Channel state information transmission method appraratus and system

A precoding method, a precoding apparatus, a Frequency Domain Equalization (FDE) method, and an FDE apparatus are provided in the embodiments of the present invention. The precoding method includes: performing offset modulation for a transmitting signal vector; calculating a precoding matrix according to the offset-modulated transmitting signal vector and a receiver decision signal vector, where the precoding matrix is used for performing precoding for the transmitting signal vector; and performing precoding for the transmitting signal vector according to the precoding matrix. Linear precoding is performed by using the offset-modulated signal on the transmitter, and therefore, the interference caused by multiple antennas and multipath propagation is reduced, the system BER is reduced, and the complexity of implementation is low.

Transmit methods with delay diversity and space-frequency diversity

In this invention, several open-loop solutions that encompass the small delay CDD codeword cycling, codeword cycling between different re-transmissions of both small and large delay CDD are proposed. In addition, an open-loop codeword cycling method for SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ, are proposed. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded by using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas.

Process for decoding alamouti block code in an ofdm system, and receiver for the same

A process for decoding a signal being representative of a Space Time or Frequency Block coding during two signaling periods (STBC) or two parallel channels (SFBC) is provided. The process receives an OFDM signal received from at least one antenna. The process also performs an OFDM demodulation in order to generate N frequency domain representations of the received signal. Then the process performs a decoding process on said OFDM demodulated signal and groups the received signal in word code, Y=(y 1 , y 2 ), to represent the signal that was received during two signaling periods (STBC) or two parallel channels (SFBC). The word code is then decoded into a matrix after which a lattice reduction algorithm is applied to the matrix in order to transform the matrix into a reduced matrix having a near orthogonal vector. Then it performs a detection process on the reduced matrix to improve noise and interference immunity.

Network coordination for improved interference cancellation

Communications by base stations in wireless communication networks may be coordinated in a manner to improve performance by mobile devices experiencing interference from non-serving base stations. In particular, base station communications may be coordinated to improve the performance of interference cancellation by mobile devices. If a user equipment (UE) experiencing interference is capable of interference cancellation, then the base stations may coordinate to increase interference to that user equipment so as to improve that UE's ability to perform interference cancellation. Base stations may also coordinate to reduce interference for a UE, regardless of the UE's ability to perform interference cancellation. Mobile device performance improvements may also be achieved by coordinating scheduling of resources by the non-serving base stations, by using communication formats compatible with interference cancellation, by spatial coordination.

TRANSMIT METHODS WITH DELAY DIVERSITY AND SPACE-FREQUENCY DIVERSITY

Several open-loop solutions encompass the small delay CDD codeword cycling and codeword cycling between different re-transmissions of both small and large delay CDD, and include an open-loop codeword cycling method for an SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas. 1. A method for transmission in a communication system , the method comprising:encoding a plurality of information bits to generate a plurality of coded bits;scrambling the plurality of coded bits to generate a plurality of scrambled bits;modulating the plurality of scrambled bits to generate a plurality of modulation symbols;mapping the plurality of modulation symbols onto the subcarriers in at least one transmission layer of a transmission resource;precoding the modulation symbols by using a precoding matrix for transmit diversity, the precoding matrix including codewords of a codebook that are changed every certain number of subcarriers, wherein indices of the codewords are determined by performing a modulo operation based on a number of transmission layers and a size of at least one subset of the codewords in the codebook.261-. (canceled) This application incorporates by reference: U.S. patent application Ser. No. 13/448,090 filed Apr. 16, 2012, now U.S. Pat. No. 8,401,107; U.S. patent application Ser. No. 12/155,319 filed Jun. 2, 2008, now U.S. Pat. No. 8,160,177; and U.S. Provisional Patent ...

System and Method for Mapping Symbols for MIMO Transmission

Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined 141-. (canceled)42. A method of receiving signals transmitted by three antennas comprising: a plurality of the OFDM symbols having a plurality of OFDM sub-carriers carrying data,', 'at least one pilot of a first antenna of the three antennas that is adjacent in one of time or frequency to a pilot of a second antenna of the three antennas, and', 'the at least one pilot of the first antenna of the three antennas is adjacent in the other of the time or frequency to a pilot of a third antenna of the three antennas; and decoding the respective sequence of OFDM symbols to generate the received signals., 'receiving, from each of the three antennas, a respective sequence of OFDM symbols, wherein the respective sequence of OFDM symbols comprises,'}43. The method of claim 42 , wherein the pilots for the three antennas are grouped collectively in groups of pilots claim 42 , each of the groups of pilots containing the pilot associated with the first antenna claim 42 , the pilot of the second antenna claim 42 , and the pilot of the third antenna claim 42 , the groups of pilots being scattered in time and frequency.44. The method of claim 43 , wherein each group of pilots comprises a first and a second pilot on a first OFDM sub- ...

Method and apparatus for information transmission in a radio communication system

A method of transmitting, by a transmitter, information in a wireless communication system, the method includes generating first and second symbols; generating first and second transmit vectors on the basis of an Alamouti code from the first and second symbols; and transmitting the first transmit vector through a first antenna and transmitting the second transmit vector through a second antenna. The first transmit vector consists of a first transmit symbol and a second transmit symbol. The second transmit vector consists of a third transmit symbol and a fourth transmit symbol. The first, second, third, and fourth transmit symbols are transmitted based on first and second resource indexes. The first symbol is a first modulation symbol for first information, and the second symbol is a second modulation symbol for second information.

APPARATUS AND METHOD FOR DIVERSITY TRANSMISSION IN A WIRELESS COMMUNICATIONS SYSTEM

An transmission apparatus of the present disclosure comprises a transmission signal generator which, in operation, generates a transmission signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and each of the two or more frequency diversity transmission schemes is specified based on a value of the Nss; and a transmitter which, in operation, transmits the generated transmission signal. 1. A transmission apparatus comprising:{'sub': ss', 'ss, 'a transmission signal generator which, in operation, generates a transmission signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (N) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and each of the two or more frequency diversity transmission schemes is specified based on a value of the N; and'}a transmitter which, in operation, transmits the generated transmission signal.2. The transmission apparatus according to claim 1 , wherein the non-legacy preamble comprises a third field for indicating whether the frequency diversity transmission scheme is applied to the data field.3. The transmission apparatus according to claim 1 , wherein the two or more frequency diversity transmission schemes include a first scheme which is a frequency diversity scheme without space diversity.4. The transmission apparatus according to claim 1 , wherein if the value of the Nequals to a first predetermined value and the non-legacy preamble indicates that the first scheme is applied to the data field claim 1 , the first scheme is ...

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL CHANNEL IN SHORTENED TRANSMISSION TIME INTERVALS

A method of receiving a downlink control channel in a user equipment may include receiving, using two or more antenna ports, a shortened physical downlink control channel (PDCCH) transmitted using a space-frequency block code (SFBC), by using at least one shortened control channel element (SCCE) for shortened transmission time interval (STTI) transmission; and monitoring the shortened PDCCH. The at least one SCCE may include at least one shortened resource element group (REG) including a number of resource elements (REs), where the number is unequal to an integer multiple of the number of antenna ports allocated to the shortened PDCCH. 1. A method of receiving a downlink control channel in a user equipment , the method comprising:receiving, using two or more antenna ports, a shortened physical downlink control channel (PDCCH) transmitted using a space-frequency block code (SFBC), by using at least one shortened control channel element (CCE) for shortened transmission time interval (TTI) transmission; andmonitoring the shortened PDCCH,wherein the at least one shortened CCE comprises at least one shortened resource element group (REG) comprising a number of allocated resource elements (REs), the number being unequal to an integer multiple of the number of the antenna ports allocated to the shortened PDCCH.2. The method of claim 1 , wherein the shortened PDCCH is a cell specific reference signal (CRS)-based shortened PDCCH.3. The method of claim 2 , wherein the at least one shortened REG comprises a resource element to which a channel state information reference signal (CSI-RS) is allocated.4. The method of claim 2 , wherein the at least one shortened REG comprises at least one RE that is not allocated to the shortened PDCCH.5. The method of claim 1 , wherein the shortened TTI is a slot-based shortened TTI or a subslot-based shortened TTI claim 1 , andthe receiving of the shortened PDCCH is performed under a time division duplex (TDD) mode when the shortened TTI is the ...

Communication system with whitening mechanism and method of operation thereof

A communication system includes: a signal analysis module configured to receive a receiver signal for communicating a transmitter signal with an interference signal; a covariance module, coupled to the signal analysis module, configured to calculate a joint-covariance corresponding to a communication subcarrier data and a further subcarrier data within the receiver signal; a preparation module, coupled to the covariance module, configured to generate a joint-whitener based on the joint-covariance for randomizing the interference signal; and a joint whitening module, coupled to the preparation module, configured to generate a joint-whitened data based on the receiver signal and the joint-whitener for communicating with a device.

DATA RESOURCE MAPPING FOR FREQUENCY-CODED SYMBOLS

A device and method for communicating frequency-coded symbols that include data elements and reference symbols are disclosed. In one aspect, a carrier frequency band includes a plurality of subcarrier frequency bands. Data elements are transmitted and received on respective pairs of adjacent subcarrier frequency bands to provide diversity. Reference symbols are transmitted and received on predetermined subcarrier frequency bands. Muting is applied to selected subcarrier frequency bands based on the number and frequency configuration of the reference symbols. 128-. (canceled)29. A device comprising:a processor;a transmitter coupled to the processor; andat least one pair of antennas coupled to the transmitter, wherein the processor is configured to:identify one or more subcarrier frequency bands for transmitting one or more corresponding reference symbols;determine a number of available subcarrier frequency bands for transmitting data symbols;determine whether to transmit the data symbols on the available subcarrier frequency bands based at least in part on a predetermined rule, wherein the predetermined rule includes muting all of the plurality of subcarrier bands of the carrier frequency when the determined number of available subcarrier frequency bands is an odd number; andmute, in response to the determining whether to transmit, all of the plurality of subcarrier bands of the carrier frequency.30. The device according to claim 29 , wherein the predetermined rule further includes allowing transmission of data symbols on the available subcarrier frequency bands when the determined number of the available subcarrier frequency bands is an even number.31. The device according to claim 29 , wherein each of the data symbols is frequency coded using space frequency block coding (SFBC).32. The device according to claim 31 , wherein each of the SFBC-coded data symbols is included in an orthogonal frequency division multiplexing (OFDM) symbol.33. The device according to ...

Data transmission method and apparatus

Embodiments of the present invention provide a data transmission method and apparatus, and the method includes: modulating to-be-sent information bits according to a lower order constellation diagram, and generating 4m lower order modulation symbols; multiplying a precoding matrix Q by a column vector including every four lower order modulation symbols in the 4m lower order modulation symbols, to obtain 4m to-be-sent higher order modulation symbols corresponding to a higher order constellation diagram; and respectively and correspondingly sending the 4m to-be-sent higher order modulation symbols on different carriers of two antennas. The to-be-sent higher order modulation symbols include some or all to-be-sent information bits. Therefore, the same signal can be simultaneously sent on different carriers of multiple antennas, and frequency diversity and space diversity are implemented, so that transceiving performance of data transmission is improved.

METHODS AND APPARATUS FOR A DATA TRANSMISSION SCHEME FOR NARROW-BAND INTERNET OF THINGS (NB-IOT)

Certain aspects of the present disclosure relate to methods and apparatus for implementing a data transmission scheme for Narrow-Band Internet of Things (NB-IoT). A User Equipment (UE) combines pairs of antenna ports to generate at least first and second combined antennas ports. The UE receives reference signals transmitted in a narrow band region of a larger system bandwidth, and for each combined port, adds the references signals received on resource elements (REs) of each of the combined pair of antenna ports. The UE determines channel estimates for each combined antenna port based on the added reference signals for the combined port. 1. A method of wireless communication comprising:configuring two or more Resource Blocks (RBs) for transmission in a cell;configuring a same scrambling sequence for the two or more RBs for the transmission in the cell; andscrambling data to be transmitted in each of the RBs with the scrambling sequence.2. The method of claim 1 , further comprising configuring a different Physical Cell Identifier in each of the two or more RBs.3. An apparatus of wireless communication claim 1 , comprising:at least one processor configured to:configure two or more Resource Blocks (RBs) for transmission in a cell;configure a same scrambling sequence for the two or more RBs for the transmission in the cell; andscramble data to be transmitted in each of the RBs with the scrambling sequence; andmemory coupled to the at least one processor.4. The apparatus of claim 3 , wherein the at least one processor is further configured to configure a different Physical Cell Identifier in each of the two or more RBs.5. An apparatus of wireless communication claim 3 , comprising:means for configuring two or more Resource Blocks (RBs) for transmission in a cell;means for configuring a same scrambling sequence for the two or more RBs for the transmission in the cell; andmeans for scrambling data to be transmitted in each of the RBs with the scrambling sequence.6. The ...

Space-time/space-frequency coding for multi-site and multi-beam transmission

The present invention relates to space-time or space-frequency coding in cellular systems. The same data is transmitted from different antennas with different coverage areas, corresponding to different cells. The different data streams have different parts of the space-time block codes applied. A mobile terminal can combine the different parts of the space-time block codes in different received signals. This provides better performance than the known techniques for single frequency networks. The invention can also be applied to antennas with different coverage areas from the same site, and different beams formed with antenna arrays.

METHOD FOR MAPPING AND DEMAPPING RESOURCE IN A WIRELESS COMMUNICATION SYSTEM AND AN APPARATUS THEREOF

A method and apparatus for mapping/demapping a resource efficiently in a wireless communication system are provided. A resource mapping method of a transmitter in a wireless communication system includes precoding pairs of symbols, arranging the pairs of precoded symbols adjacently in a resource block, and transmitting the pairs of precoded symbols in the resource block. 1. A method of receiving data in a wireless communication system using transmission diversity , the method comprising:demapping precoded data symbols from at least one resource element of a received signal according to a mapping rule; anddecoding the precoded data symbols according to a symbol precoding scheme,wherein, the precoded data symbols are not mapped to the at least one resource element if a separation between the at least one resource element that is capable of being used in the mapping of the precoded data symbols in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a resource block is two or more indexes.2. The method of claim 1 , wherein the OFDM symbol contains a Channel State Information Reference Signal (CSI-RS).3. An apparatus for receiving data in a wireless communication system using transmission diversity claim 1 , the apparatus comprising:a resource element demapper for demapping precoded data symbols from at least one resource element of a received signal according to a mapping rule; anda decoder for decoding the precoded data symbols according to a symbol precoding scheme,wherein, the precoded data symbols are not mapped to the at least one resource element if a separation between the at least one resource element that is capable of being used in the mapping of the precoded data symbols in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a resource block is two or more indexes.4. The apparatus of claim 3 , wherein the OFDM symbol contains a Channel State Information Reference Signal (CSI-RS). This application is a continuation of U.S. patent ...

METHOD FOR MAPPING AND DEMAPPING RESOURCE IN A WIRELESS COMMUNICATION SYSTEM AND AN APPARATUS THEREOF

A method and apparatus for mapping/demapping a resource efficiently in a wireless communication system are provided. A resource mapping method of a transmitter in a wireless communication system includes precoding pairs of symbols, arranging the pairs of precoded symbols adjacently in a resource block, and transmitting the pairs of precoded symbols in the resource block. 1. A method of receiving data in a wireless communication system using transmission diversity , the method comprising:demapping precoded data symbols from at least one resource element of a received signal according to a mapping rule; anddecoding the precoded data symbols according to a symbol precoding scheme,wherein, the precoded data symbols are not mapped to the at least one resource element if the number of the at least one resource element that is capable of being used in the mapping in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a resource block is odd.2. The method of claim 1 , wherein the OFDM symbol contains a Channel State Information Reference Signal (CSI-RS).3. An apparatus for receiving data in a wireless communication system using transmission diversity claim 1 , the apparatus comprising:a resource element demapper for demapping precoded data symbols from at least one resource element of a received signal according to a mapping rule; anda decoder for decoding the precoded data symbols according to a symbol precoding scheme,wherein, the precoded data symbols are not mapped to the at least one resource element if the number of the at least one resource element that is capable of being used in the mapping in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a resource block is odd.4. The apparatus of claim 3 , wherein the OFDM symbol contains a Channel State Information Reference Signal (CSI-RS). This application is a continuation of U.S. patent application Ser. No. 14/041,306, filed on Sep. 30, 2013, which is a continuation of U.S. patent application Ser. ...

METHOD AND APPARATUS FOR TRANSMITTING DATA

Embodiments of the present invention disclose a method and an apparatus for transmitting data, and the method includes: first setting at least two second resource groups in each first resource group of at least one first resource group, and setting at least two reference signals in each of the second resource groups; then encoding data to be transmitted and generating two data streams from the encoded data; then, mapping the two data streams onto an available resource element of two different antenna ports, in which the reference signals corresponding to the two different antenna ports are set on two different second resource groups; and finally, transmitting, on the available resource element of the two different antenna ports, data on the two antenna ports. The present invention is applicable to the field of communications systems. 1. A method for receiving data , comprising:receiving data of two data streams and reference signals, wherein at least two second resource groups are comprised in each first resource group of at least one first resource group, wherein each of the second resource groups is capable of bearing at least two reference signals, wherein the at least two reference signals correspond to different antenna ports, wherein the two data streams are mapped onto REs of two different antenna ports and the reference signals corresponding to the two different antenna ports are borne on two different second resource groups of the first resource group; anddecoding the received data streams,wherein the reference signals comprise demodulation reference signals (DMRS).2. The method of claim 1 , wherein time and frequency resources occupied by the two different second resource groups are different from each other.3. The method of claim 1 , wherein time and frequency resource occupied by the two different second resource groups are orthogonal to each other.4. The method of claim 1 , wherein the second resource group comprises 12 resource elements (REs).5. The ...

Apparatus, system and method of multi-input-multi-output (mimo) beamformed communication with space block coding

Some demonstrative embodiments include devices, systems and/or methods of beamformed communication with space block coding. For example, an apparatus may include a controller to control a plurality of antenna subarrays to form a plurality of directional beams directed in a plurality of different directions for communicating a multi-input-multi-output (MIMO) wireless transmission, which is encoded according to a space-block coding scheme.

METHOD FOR TRANSMITTING CONTROL AND TRAINING SYMBOLS IN MULTI-USER WIRELESS COMMUNICATION SYSTEM

The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result. 1. A method of transmitting a frame in a wireless local area network , the method comprising:generating a legacy short training field (STF) used for at least one receiver to estimate an automatic gain control and a coarse frequency offset;generating a legacy long training field (LTF) used for the at least one receiver to estimate a fine frequency offset;generating a first Very High Throughput (VHT) control field including common control information which is common to each receiver;generating a VHT STF used for improving automatic gain control estimation in a wireless transmission;generating a VHT LTF used for estimating a wireless channel;generating a second VHT control field including specific control information specific to each receiver;generating a physical layer protocol data unit (PPDU) including the legacy STF, the legacy LTF, the first VHT control field, the VHT STF, the VHT LTF, the second VHT control field and a data field; andtransmitting the PPDU to the at least one receiver,wherein the specific control information includes information indicating a length of the data field for ...

Data transmission method and apparatus, and system

This application provides a data transmission method, so that data transmission reliability can be improved. The method includes: receiving, by the terminal device, a plurality of reference signals used for channel measurement; and sending, by the terminal device, a plurality of pieces of first indication information based on the at least one reference signal and a transmission scheme on which CSI feedback is based, where the plurality of pieces of first indication information are used to indicate x target precoding matrices, at least one of the plurality of pieces of first indication information is used to indicate one target precoding matrix, and the x target precoding matrices are determined based on the plurality of precoding matrices, where x is a quantity of target precoding matrices that need to be fed back, and x is an integer greater than 1.

METHOD OF CONFIGURING REFERENCE SIGNAL FOR OPEN-LOOP MULTI-ANTENNA TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

A method of receiving a downlink channel, which is received by a user equipment from an eNB in a wireless communication system, is disclosed in the present specification. Specifically, the method includes the steps of receiving a downlink control channel for receiving a DM-RS (demodulation reference signal) based downlink data channel from the eNB, and receiving the DM-RS based downlink data channel using DM-RS configuration information included in the downlink control channel. In this case, if single-codeword transmission via the DM-RS based downlink data channel is indicated by the downlink control channel, the DM-RS based downlink data channel is received using a transmission diversity scheme. If two-codewords transmission via the DM-RS based downlink data channel is indicated by the downlink control channel, the DM-RS based downlink data channel is received using a spatial multiplexing scheme. 1. A method of receiving a downlink channel from an eNB by a user equipment in a wireless communication system , the method comprising:receiving a downlink control channel for receiving a DM-RS (demodulation reference signal) based downlink data channel from the eNB; andreceiving the DM-RS based downlink data channel using DM-RS configuration information included in the downlink control channel,wherein if single-codeword transmission via the DM-RS based downlink data channel is indicated by the downlink control channel, the DM-RS based downlink data channel is received using a transmission diversity scheme, andwherein if two-codewords transmission via the DM-RS based downlink data channel is indicated by the downlink control channel, the DM-RS based downlink data channel is received using a spatial multiplexing scheme.2. The method of claim 1 , wherein if the single-codeword transmission via the DM-RS based downlink data channel is indicated by the downlink control channel claim 1 , the DM-RS based downlink data channel is received using a SFBC (space frequency block ...

APPARATUS, SYSTEM AND METHOD OF MULTI-INPUT-MULTI-OUTPUT (MIMO) BEAMFORMED COMMUNICATION WITH SPACE BLOCK CODING

Some demonstrative embodiments include devices, systems and/or methods of beamformed communication with space block coding. For example, an apparatus may include a controller to control a plurality of antenna subarrays to form a plurality of directional beams directed in a plurality of different directions for communicating a multi-input-multi-output (MIMO) wireless transmission, which is encoded according to a space-block coding scheme. 1. (canceled)2. An apparatus comprising:a memory having stored thereon instructions; and encode a stream of data symbols into first and second encoded streams according to a Space-Time-Block-Code (STBC) encoding scheme by encoding a data symbol in the stream of data symbols into a pair of encoded data symbols to be included in the first and second encoded streams, respectively; and', 'transmit a Multiple-Input-Multiple-Output (MIMO) transmission based on the first and second encoded streams by hybrid beamforming over a Directional Multi-Gigabit (DMG) channel, the hybrid beamforming comprising baseband beamforming and antenna beamforming of an antenna configuration., 'a processor configured to execute the instructions to cause a wireless communication station (STA) to3. The apparatus of configured to cause the STA to encode a first data symbol in the stream of data symbols into a first pair of encoded symbols and to encode a second data symbol in the stream of data symbols into a second pair of encoded symbols claim 2 , the second data symbol consecutive to the first data symbol claim 2 , the first pair of encoded symbols comprising the first data symbol and a complex conjugate of the first data symbol claim 2 , the second pair of encoded symbols comprising the second data symbol and a sign-inverted complex conjugate of the second data symbol.4. The apparatus of configured to cause the STA to modulate the MIMO transmission according to a Single Carrier (SC) modulation scheme.5. The apparatus of configured to cause the STA to modulate ...

APPARATUS AND METHOD FOR DIVERSITY TRANSMISSION IN A WIRELESS COMMUNICATIONS SYSTEM

An transmission apparatus of the present disclosure comprises a transmission signal generator which, in operation, generates a transmission signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and each of the two or more frequency diversity transmission schemes is specified based on a value of the Nss; and a transmitter which, in operation, transmits the generated transmission signal. 1. A station , comprising:a receiver which, in operation, receives a signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and one of the two or more frequency diversity transmission schemes is specified based on a value of the Nss; andcircuitry which, in operation, decodes the signal.2. The station according to claim 1 , wherein the non-legacy preamble comprises a third field for indicating whether at least one of the two or more frequency diversity transmission schemes is applied to the data field.3. The station according to claim 1 , wherein the two or more frequency diversity transmission schemes include a first scheme which is a frequency diversity scheme without spatial diversity.4. The station according to claim 3 , wherein if the value of the Nss equals to a first determined value and the non-legacy preamble indicates that the first scheme is applied to the data field claim 3 , the first scheme is applied to at least one of the spatial streams.5. The station according to claim 4 , wherein the first ...

MIXED SPACE TIME AND SPACE FREQUENCY BLOCK CODING

Systems and methods for mixed space time and space frequency block coding are provided. In some embodiments, a method of operating a first node in a wireless communication network for providing time and frequency diversity includes precoding modulation symbols intended for a second node according to two antenna ports on which they are to be transmitted. In a first subset of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, mapping the precoded modulation symbols to resource elements starting first with indices corresponds to frequency. In a different subset of OFDM symbols, mapping the precoded modulation symbols to resource elements in any two adjacent OFDM symbols starting first with indices corresponds to time. In this way, transmission efficiency may be increased by not having any resource elements unused. Additional flexibility for precoding may also be provided when there is no symbol pair mapped to resource elements across two resource blocks. 1. A method of operation of a first node with multiple transmit antennas in a wireless communication network for providing time and frequency diversity , comprising:precoding modulation symbols intended for a second node according to two antenna ports on which they are to be transmitted;in a first subset of Orthogonal Frequency-Division Multiplexing, OFDM, symbols, mapping the precoded modulation symbols to resource elements starting first with indices corresponding to a frequency; andin a different subset of OFDM symbols, mapping the precoded modulation symbols to resource elements in any two adjacent OFDM symbols starting first with indices corresponding to time.2. The method of further comprising:configuring the second node with a downlink semi-open-loop transmission scheme; andtransmitting, to the second node, the precoded modulation symbols over the mapped resource elements of the two antenna ports.3. The method of wherein the first subset of OFDM symbols uses Space Frequency Block Coding claim 1 , SFBC ...

Physical Broadcast Channel Design

Briefly, in accordance with one or more embodiments, apparatus of an evolved NodeB (eNB) comprises circuitry to configure one or more parameters for a 5G master information block (xMIB). The xMIB contains at least one of the following parameters: downlink system bandwidth, system frame number (SFN), or configuration for other physical channels, or a combination thereof. The apparatus of the eNB comprises circuitry to transmit the xMIB via a 5G physical broadcast channel (xPBCH) on a predefined resource, the xPBCH comprising a xPBCH. The xPBCH may use a DM-RS based transmission mode, and a beamformed xPBCH may be used for mid band and high band. 124-. (canceled)25. An apparatus of an evolved NodeB (eNB) comprising circuitry to:configure, via baseband processing circuitry, one or more parameters for a Fifth Generation (5G) master information block (xMIB), wherein the xMIB contains at least one of the following parameters: downlink system bandwidth, system frame number (SFN), or configuration for other physical channels, or a combination thereof; andtransmit, via radio-frequency processing circuitry, the xMIB via a 5G physical broadcast channel (xPBCH) on a predefined resource.26. The apparatus as claimed in claim 25 , wherein the configuration of other physical channels comprises a 5G physical downlink control channel (xPDCCH) configuration for a common search space.27. The apparatus as claimed in claim 25 , comprising baseband processing circuitry to apply a cyclic redundancy check (CRC) is attached to the xMIB.28. The apparatus as claimed in claim 27 , wherein the CRC comprises 16-bits or 24-bits claim 27 , and wherein the CRC is masked with a codeword corresponding to a number of transmit antenna ports.29. The apparatus as claimed in claim 27 , wherein a CRC mask with a codeword corresponding to the number of transmit antenna ports is not utilized for the xPBCH transmission.30. The apparatus as claimed in claim 27 , wherein the CRC is masked with a least ...

DATA TRANSMISSION METHOD AND DEVICE

A data transmission method and device are provided. The method includes that: a terminal receives indication information transmitted by a network-side device, the indication information being configured to indicate a first transmit diversity manner; and the terminal receives first data in the first transmit diversity manner. In the embodiments of the present disclosure, the network-side device transmits the indication information to the terminal to notify the terminal of the transmit diversity manner for data reception. By adopting this solution, data reception based on only a fixed transmit diversity manner in a related technology can be avoided, and the terminal may regulate the transmit diversity manner according to the indication information transmitted by the network-side device, so that flexibility of a data transmission manner is improved. 1. A data transmission method , comprising:receiving, by a terminal, indication information transmitted by a network-side device, the indication information being configured to indicate a first transmit diversity manner; andreceiving, by the terminal, first data in the first transmit diversity manner.2. The method as claimed in claim 1 , before receiving claim 1 , by the terminal claim 1 , the indication information transmitted by the network-side device claim 1 , further comprising:receiving, by the terminal, second data in a second transmit diversity manner,3. The method as claimed in claim 1 , wherein the first data is transmitted to the terminal through a first beam and a second beam claim 1 , the terminal is located in a switching region between the first beam and the second beam claim 1 , the first beam is a source beam serving the terminal before the terminal is switched to the second beam claim 1 , and the second beam is a target beam to which the terminal is switched.4. The method as claimed in claim 3 , whereinthe first beam and the second beam are transmitted by a same Transmit and Receive Point (TRP);orthe first ...

TRANSMIT DIVERSITY FOR UPLINK CONTROL CHANNEL USING DISCRETE FOURIER TRANSFORM SPREAD ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (DFT-S-OFDM) WAVEFORMS

Methods and apparatuses are described herein for transmit diversity in an uplink control channel. A wireless transmit/receive unit (WTRU) may perform a Discrete Fourier Transform (DFT) precoding operation on a data symbol sequence segment to generate a DFT precoded segment. The WTRU may then perform a Space Frequency Block Coding (SFBC) operation on the DFT precoded segment to generate a SFBC processed segment. The data symbols of the DFT precoded segment may be reordered in the SFBC processed segment. The WTRU may map the DFT precoded segment to a first set of contiguous subcarriers and the SFBC processed segment to a second set of contiguous subcarriers. The WTRU may then transmit a first DFT spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) signal on the first set of contiguous subcarriers via a first antenna port and a second DFT-s-OFDM signal on the second set of contiguous subcarriers via a second antenna port. 1. A method for use in a wireless transmit/receive unit (WTRU) , the method comprising:splitting a data symbol input sequence into one or more data symbol sequence segments, wherein a number of the one or more data symbol sequence segments is determined based on at least one of a channel delay spread, a modulation order, or a bandwidth allocation;performing a first Discrete Fourier Transform (DFT) precoding operation on a first data symbol sequence segment from the one or more data symbol sequence segments to generate a first DFT precoded segment;performing a first Space Frequency Block Coding (SFBC) operation on the first DFT precoded segment to generate a first SFBC processed segment, wherein data symbols of the first DFT precoded segment is reordered in the first SFBC processed segment;mapping the first DFT precoded segment to a first set of contiguous subcarriers and the first SFBC processed segment to a second set of contiguous subcarriers; andtransmitting a first Discrete Fourier Transform spread Orthogonal Frequency Division ...

Spatio-Temporal Processing for Communication

A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element and/or single receiver antenna element. The system is not restricted to wireless contexts and may exploit any channel having multiple inputs or multiple outputs and certain other characteristics. Multi-path effects in a transmission medium cause a multiplicative increase in capacity.

Method and Apparatus for Implementing Space Frequency Block Coding in an Orthogonal Frequency Division Multiplexing Wireless Communication System

The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes. 1. (canceled)2. A device configured to perform space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system , the device comprising:a plurality of antennas; and generate a channel coded data stream comprising a plurality of data bits;', 'SFBC encode the channel coded data stream to generate an SFBC encoded data stream;', 'beamform the SFBC encoded data stream to generate a SFBC encoded beamformed data stream; and', 'transmit the SFBC encoded beamformed data stream via the plurality of antennas as an OFDM signal., 'a processor configured to3. The device of claim 2 , wherein the processor is configured to:SFBC encode the channel coded data stream using a plurality of pairs of OFDM sub-carriers; andtransmit the SFBC encoded beamformed data stream over the plurality of pairs of OFDM sub-carriers using the plurality of antennas as the OFDM signal.4. The device of claim 3 , wherein a portion of the channel coded data stream that is SFBC encoded using a pair of OFDM sub- ...

METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING

A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream. 138-. (canceled)39. A method for transmitting multiple data streams in an Institute of Electrical and Electronics Engineers (IEEE) 802.11 device , the method comprising:generating a first spatial stream and a second spatial stream; processing each of the first spatial stream and the second spatial stream to generate two or more space-time streams,', 'mapping the space-time streams associated with the first STA to a plurality of data streams, and', 'transmitting the plurality of data streams via a plurality of antennas to the first STA;, 'on a condition that the first spatial stream and the second spatial stream belong to a first station (STA) processing the first spatial stream to generate a first set of two or more space-time streams and the second spatial stream to generate a second set of two or more space-time streams,', 'mapping the first set of space-time streams and the second set of space-time streams to a plurality of data streams, and', 'transmitting the data streams via a plurality of ...

METHOD AND APPARATUS FOR TRANSMITTING SIGNAL USING SPACE TIME BLOCK CODE OR SPACE FREQUENCY BLOCK CODE IN MULTI-CARRIER SYSTEM

An STBC/SFBC-based signal transmission method and apparatus is provided for use in a multi-carrier system. A method for a transmitter to transmit a signal to a receiver in a diversity transmission mode according to the present invention includes transmitting a filter index indicating a filter allocated to the receiver and transmitting Space Time Block Code (STBC) symbols to the receiver at symbol positions selected based on the filter index. 1. A method for a transmitter to transmit a signal to a receiver in a diversity transmission mode , the method comprising:transmitting, to a receiver, a filter index indicating a filter allocated to the receiver; andtransmitting, to the receiver, Space Time Block Code (STBC) symbols at symbol positions selected based on the filter index.2. The method of claim 1 , further comprising:transmitting, to the receiver, an indicator indicating start of the diversity transmission mode; andreceiving, from the receiver, a capability indicator indicating transmission modes supported by the receiver.3. The method of claim 1 , wherein the symbol positions are determined based on at least one of difference values claim 1 , in time and frequency domains claim 1 , between a symbol position from which a greatest interference occurs to a reference symbol indicated by the filter index.4. The method of claim 1 , further comprising configuring claim 1 , when no information on the filter index is stored in the transmitter claim 1 , interference information in association with the filter index.5. A method for a receiver to receive a signal from a transmitter in a diversity transmission mode claim 1 , the method comprising:receiving, from a transmitter, a filter index indicating a filter which the transmitter allocates to the receiver; andreceiving, from the transmitter, STBC symbols at symbol positions selected based on the filter index.6. The method of claim 5 , further comprising:receiving, from the transmitter, an indicator indicating start of the ...

Transmitting spread signal in communication system

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.

Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system

The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

DISTRIBUTED MIMO AND/OR TRANSMIT DIVERSITY IN A CLOUD-RAN SYSTEM

One embodiment is directed to a system that implements a downlink transmission mode that precodes sequences of symbols using a precoder matrix selected from a codebook. Linear transformations are performed on the sequences of precoded symbols using a distribution matrix. The distribution matrix is configured so that each of a plurality of precoder matrices provides perfect steering of transmit power to a corresponding one of a plurality of disjoint subsets of the antenna ports used for the downlink transmission mode. Also, the distribution matrix can be configured so that at least one precoder matrix provides peak power at all of the antenna ports used for the downlink transmission mode. 1. A method of reusing a resource element to transmit user data to a plurality of items of user equipment using a downlink transmission mode that uses multiple antenna ports , wherein the downlink transmission mode precodes sequences of symbols using a precoder matrix selected from a codebook , wherein the precoding produces sequences of precoded symbols , the method comprising:performing linear transformations on the sequences of precoded symbols using a distribution matrix, wherein the distribution matrix is configured so that each of a plurality of precoder matrices provides perfect steering of transmit power to a corresponding one of a plurality of disjoint subsets of the antenna ports used for the downlink transmission mode;determining if the resource element can be reused to transmit user data to the plurality of items of user equipment; and assigning a respective simulcast group to each of the plurality of items of user equipment that uses a respective one of the plurality of disjoint subsets of antenna ports; and', 'transmitting user data to each of the items of user equipment using a respective precoder matrix that provides perfect steering to the respective subset of antenna ports in the respective simulcast group for that item of user equipment., 'when the resource ...

WIRELESS DEVICE COMMUNICATIONS SYSTEM

A device includes circuitry configured to determine feedforward and feedback coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based on previously received signals. The equalizer output is determined by applying the feedforward and feedback coefficients of the AFD-DFE to a received signal, and the feedforward and feedback coefficients of the AFD-DFE are updated based on the equalizer output. 1. A wireless device communications system , comprising:a wireless device comprising a transmitter to transmit an RF signal, anda base station comprising a receiver to receive the RF signal, generate a plurality of signal matrices based on received signals,', 'determine feedforward coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based in part on the signal matrices,', 'generate a plurality of decision matrices based on transformed feedforward coefficients,', 'determine feedback coefficients for the AFD-DFE based in part on the plurality of decision matrices,', 'generate a first matrix having the plurality of signal matrices and the decision matrices,', 'generate a second matrix including the feedforward coefficients and the feedback coefficients of the AFD-DFE,', 'determine an equalizer output as a function of the first matrix and the second matrix such that the function includes the plurality of signal matrices multiplied by the feedback coefficients, and', 'update the feedforward and feedback coefficients of the AFD-DFE based on the equalizer output., 'wherein the wireless device comprises circuitry configured to'}2. The wireless device communications system of claim 1 , wherein the circuitry is further configured to determine the feedforward and feedback coefficients based on a recursive least squares (RLS) calculation.3. The wireless device communications system of claim 2 , wherein the circuitry is further configured to determine the RLS calculation with at least one constraint.4. The wireless device ...

CHANNEL STATE INFORMATION TRANSMISSION METHOD, APPARATUS AND SYSTEM

A precoding method, a precoding apparatus, a Frequency Domain Equalization (FDE) method, and an FDE apparatus are provided in the embodiments of the present invention. The precoding method includes: performing offset modulation for a transmitting signal vector; calculating a precoding matrix according to the offset-modulated transmitting signal vector and a receiver decision signal vector, where the precoding matrix is used for performing precoding for the transmitting signal vector; and performing precoding for the transmitting signal vector according to the precoding matrix. Linear precoding is performed by using the offset-modulated signal on the transmitter, and therefore, the interference caused by multiple antennas and multipath propagation is reduced, the system BER is reduced, and the complexity of implementation is low. 1. A Frequency Domain Equalization (FDE) method , comprising:obtaining a receiver receiving signal frequency domain vector according to offset-modulated transmitting signal from a transmitter, and using the receiving signal frequency domain vector and its conjugate vector as receiver input signals;calculating out an FDE matrix according to the transmitter transmitting signal and a receiver FDE output signal, wherein the FDE matrix is used for performing linear FDE for the receiver input signal, and an FDE output signal is obtained by multiplying the input signal by the FDE matrix; andusing the FDE matrix to perform FDE for the input signal.2. The FDE method according to claim 1 , wherein:the calculating out the FDE matrix, which is used for performing FDE for the receiver input signal, according to the transmitter transmitting signal and the receiver FDE output signal comprises:obtaining the FDE matrix used for performing linear FDE for the receiver input signal by making a mean square error between the transmitter transmitting signal and the receiver output signal to be minimum.3. The FDE method according to claim 2 , wherein:before ...

DOWNLINK CONTROL CHANNEL DESIGN FOR BEAMFORMING SYSTEMS

Described is an apparatus of a first User Equipment (UE) operable to communicate with on a wireless network. The apparatus may comprise a first circuitry, and a second circuitry. The first circuitry may be operable to establish a parameter set defining 5G Physical Downlink Control Channel (xPDCCH) transmission to the UE. The second circuitry may be operable to generate, for transmission to the UE, one or more messages including the parameter set. 125-. (canceled)26. An apparatus of an Evolved Node B (eNB) operable to communicate with a User Equipment (UE) on a wireless network , comprising: establish a parameter set defining 5G Physical Downlink Control Channel (xPDCCH) transmission to the UE, and', 'generate, for transmission to the UE, one or more messages including the parameter set; and, 'one or more processors toan interface to output the one or more messages including the parameter set to a transceiver circuitry, for transmission to the UE.27. The apparatus of claim 26 , wherein the one or more processors are to:generate, for transmission to the UE, an xPDCCH in accordance with the parameter set.28. The apparatus of claim 26 , wherein the one or more messages comprise a first message including a first parameter of the parameter set and a second message including a second parameter of the parameter set claim 26 , and wherein to generate the one or more messages claim 26 , the one or more processors are to:generate the first message for transmission via broadcast signaling to a plurality of UEs, including the UE; andgenerate the second message for transmission via unicast signaling specifically to the UE.29. The apparatus of claim 26 , wherein to establish the parameter set claim 26 , the one or more processors are to:establish one or more parameters that identify a size of a Resource Block Group (RBG) within individual subframes, the RBG being associated with xPDCCH transmission; andinclude, within the parameter set, the one or more parameters.30. The apparatus ...

Sidelink control information for vehicle-to-vehicle communications

Embodiments of the present disclosure describe methods and apparatuses for sidelink control information for vehicle-to-vehicle communications.

METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING WITH UNEQUAL MODULATION AND CODING SCHEMES

A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream. 1. A method for spatial data processing , the method comprising:modulating a first spatial stream of input data using a first modulation scheme; performing space time block coding, STBC, on the first spatial stream to generate a first space-time stream, and a second space-time stream;', 'performing STBC on the second spatial stream to generate a third space-time stream and a fourth space-time stream; and', 'transmitting the first space-time stream, the second space-time stream, the third space-time stream, and the fourth space-time stream via a plurality of antennas., 'modulating a second spatial stream of the input data using a second modulation scheme, wherein the second modulation scheme is of a higher order than the first modulation scheme;'}2. The method of claim 1 , further comprising:multiplying an antenna mapping matrix with the first space-time stream, the second space-time stream, the third space-time stream, and the fourth space-time stream.3. The method of claim 2 , wherein the antenna ...

Parallel bit interleaver

A bit interleaving method applying a bit permutation process to a QC LDPC codeword made up of N cyclic blocks of Q bits each, dividing the processed codeword into constellation words of M bits each, and applying an intra-cyclic-block permutation process to the cyclic blocks, where the codeword is divided into F×N/M folding sections of M/F cyclic blocks each and the constellation words are each associated with one of the folding sections, and the bit permutation process is applied such that the constellation words are each made up of F bits from each of M/F different cyclic blocks in the associated section, after the permutation process.

METHOD AND APPARATUS FOR COMBINING SPACE-FREQUENCY BLOCK CODING, SPATIAL MULTIPLEXING AND BEAMFORMING IN A MIMO-OFDM SYSTEM

A method and apparatus for combining space-frequency block coding (SFBC) in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system is described herein. A transmitter, according to one embodiment, may include four antennas and circuitry configured to transmit in an OFDM symbol time period using both frequency diversity and SFBC. For frequency diversity at least one first data element may be repeated producing at least two second data elements and the two second data elements are transmitted using different subcarriers. For space frequency block coding, a pair of third data elements may be space frequency block coded producing four fourth data elements. The four fourth data elements may be transmitted using two subcarriers and only two of the four antennas. 112.-. (canceled)13. A device for transmitting data symbols comprising:four antennas;a receiver configured to receive channel state information (CSI), wherein the CSI includes a channel quality indicator (CQI) for each of a plurality of groups of subcarriers;a transmitter configured to determine a number of streams for transmission using spatial multiplexing and determine a modulation and coding scheme for each of the plurality of groups of subcarriers based on each CQI;the transmitter further configured to transmit first data symbols using the plurality of groups of subcarriers and the determined number of streams; andthe transmitter further configured to transmit second data symbols using space frequency block coding (SFBC), wherein each pair of the second data symbols are SFBC coded to be transmitted on only two of four antennas.14. The transmitting device of wherein the transmitter is further configured to transmit data symbols using multiple input multiple output (MIMO).15. A device for receiving data symbols comprising:a transmitter configured to transmit channel state information (CSI), wherein the CSI includes a channel quality indicator (CQI) for each of a ...

Method and apparatus for transmitting and receiving signal using multiple antennas

An operation method of a first communication node includes generating a plurality of modulation symbols for information bits; determining a symbol mapping pattern based on a number N t of antennas of the first communication node, a number N L of spatial layers multiplexed in a same frequency resource, and a number N SSF of modulation symbols belonging to one space-frequency grid; mapping the plurality of modulation symbols to a space-frequency domain based on the symbol mapping pattern; and transmitting the plurality of modulation symbols mapped to the space-frequency domain to a second communication node using the antennas.

METHODS AND APPARATUS FOR A DATA TRANSMISSION SCHEME FOR NARROW-BAND INTERNET OF THINGS (NB-IOT)

Certain aspects of the present disclosure relate to methods and apparatus for implementing a data transmission scheme for Narrow-Band Internet of Things (NB-IoT). A User Equipment (UE) combines pairs of antenna ports to generate at least first and second combined antennas ports. The UE receives reference signals transmitted in a narrow band region of a larger system bandwidth, and for each combined port, adds the references signals received on resource elements (REs) of each of the combined pair of antenna ports. The UE determines channel estimates for each combined antenna port based on the added reference signals for the combined port. 1. A method of wireless communications by a User Equipment (UE) , comprising:combining pairs of antenna ports to generate at least first and second combined antenna ports;receiving reference signals transmitted in a narrow band region of a larger system bandwidth;for each combined antenna port, adding the reference signals received on resource elements (REs) of each of the combined pair of antenna ports; anddetermining channel estimates for each combined antenna port based on the added reference signals for the combined antenna port.2. The method of claim 1 , wherein adding the reference signals received on resource elements (REs) of each of the combined pair of antenna ports further comprises:obtaining a first descrambled signal by descrambling the REs of a first antenna port with a first scrambling sequence;obtaining a second descrambled signal by descrambling the REs of a second antenna port with a second scrambling sequence;combining the first descrambled signal with the second descrambled signal.3. The method of claim 2 , wherein the combining comprises adding the descrambled signals.4. The method of claim 2 , wherein the combining comprises:performing time and/or frequency interpolation on the descrambled signals; andadding the interpolated descrambled signals.5. The method of claim 1 , further comprising:receiving same data ...

Receiver

Appropriate reception processing is performed using a CRS-based estimation method for a covariance matrix R I+N . An IRC receiver 10 according to the present invention includes: a covariance matrix estimation unit 12/13 configured to estimate a covariance matrix R I+N based on a CRS; a missing element insertion unit 14 configured to insert a given value into an inestimable element in an interference-signal covariance matrix R I+N (“˜” is on R) of interference signal components contained in the estimated covariance matrix R I+N ; an IRC reception weight generation unit 16 configured to generate an IRC reception weight W IRC by using the control signal and the covariance matrix R I+N having the given value inserted thereinto; and a signal separation unit 17 configured to separate the data signal from a received signal by using the generated reception weight and the control signal.

DATA RESOURCE MAPPING FOR FREQUENCY-CODED SYMBOLS

A device and method for communicating frequency-coded symbols that include data elements and reference symbols are disclosed. In one aspect, a carrier frequency band includes a plurality of subcarrier frequency bands. Data elements are transmitted and received on respective pairs of adjacent subcarrier frequency bands to provide diversity. Reference symbols are transmitted and received on predetermined subcarrier frequency bands. Muting is applied to selected subcarrier frequency bands based on the number and frequency configuration of the reference symbols. 128-. (canceled)29. A method for data reception on a plurality of subcarrier frequency bands , comprising:identifying a first set of subcarrier frequency bands, the first set of subcarrier frequency bands including subcarrier frequency bands allocated for receiving one or more corresponding reference symbols;identifying a second set of subcarrier frequency bands, the second set of subcarrier frequency bands including subcarrier frequency bands available for receiving data elements, wherein each subcarrier frequency band is associated with no more than one of the first set and second set of subcarrier frequency bands;determining a first set of pairs of subcarrier frequency bands from said second set of subcarrier frequency bands, each pair of the first set of pairs including a first subcarrier frequency band and a second subcarrier frequency band adjacent to the first subcarrier frequency band;determining a second set of pairs of subcarrier frequency bands from said second set of subcarrier frequency bands, each pair of the second set of pairs including a first subcarrier frequency band and a second subcarrier frequency band where the gap between the first subcarrier frequency band and the second subcarrier frequency band is no larger than a predetermined threshold, wherein each subcarrier frequency band is associated with no more than one pair from the first set of pairs and the second set of pairs;muting any ...

METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATION SYSTEM

The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes. 1. A wireless transmit/receive unit (WTRU) comprising:a transceiver;a processor configured to:receive, via the transceiver, an orthogonal frequency division multiplexing (OFDM) signal, wherein the OFDM signal comprises a channel coded data stream that was space frequency block coding (SFBC) encoding such that the SFBC encoding was performed using a plurality of pairs of OFDM sub-carriers, and wherein a first pair of OFDM sub-carriers of an OFDM symbol is mapped to a first pair of antenna ports and a second pair of OFDM sub-carriers of the OFDM symbol is mapped to a second pair of antenna ports.2. The WTRU of claim 1 , wherein a portion of the channel coded data stream that is SFBC encoded using the first pair of OFDM sub-carriers of the OFDM symbol is SFBC encoded independently of another portion of the channel coded data stream that is SFBC encoded using the second pair of OFDM sub-carriers of the OFDM symbol.3. The WTRU of claim 1 , wherein the processor is further configured to send channel quality information (CQI) claim 1 ...

TRANSMISSION AND RECEPTION METHODS IMPLEMENTED IN COMMUNICATION DEVICES AND ASSOCIATED COMMUNICATION DEVICES

The present disclosure provides a transmission method comprising splitting a block of bits to be transmitted into a number of groups each consisting of k+2q bits, wherein k and q are natural numbers and each of the groups includes a subgroup consisting of k bits and two subgroups each consisting of q bits and performing 2-ary QAM modulation on the subgroups of q bits from the groups of k+2q bits to obtain QAM symbols, respectively. The QAM symbols are processed so that two QAM symbols obtained from the two subgroups of q bits in each of the groups of k+2q bits are mapped onto at least two antennas as consecutive processed symbols. Through the use of 2-ary FSK modulation, a frequency tone to which the two consecutive processed symbols are allocated is selected according to the subgroup of k bits from each of the groups of k+2q bits before transmission. 1. A transmission method implemented in a communication device with multiple antennas , comprising:splitting a block of bits to be transmitted into a number of groups each consisting of k+2q bits, wherein k and q are natural numbers and each of the groups includes a subgroup consisting of k bits and two subgroups each consisting of q bits;{'sup': 'q', 'performing 2-ary Quadrature Amplitude Modulation (QAM) modulation on the subgroups of q bits from the groups of k+2q bits to obtain QAM symbols, respectively;'}processing the QAM symbols according to a transmit diversity scheme, so that two QAM symbols obtained from the two subgroups of q bits in each of the groups of k+2q bits are mapped onto each of at least two of said multiple antennas as two consecutive processed symbols;{'sup': 'k', 'selecting, through the use of 2-ary Frequency Shift Keying (FSK) modulation, a frequency tone to which the two consecutive processed symbols are allocated, according to the subgroup of k bits from said each of the groups of k+2q bits; and'}transmitting the processed QAM symbols through said multiple antennas.2. The method of claim 1 , ...

RECEIVER

Provided is a receiver to improve the accuracy of estimating a covariance matrix Rbased on a data signal. In an IRC receiver according to the present invention, a data signal is configured to be transmitted in an SFBC pair including two resource elements, an estimated covariance matrix Ris configured to include a first covariance matrix R(2m) including a desired signal component in even-numbered resource elements in the SFBC pair and a second covariance matrix R(2m+1) including a desired signal component in odd-numbered resource elements in the space frequency block coding scheme unit, and a covariance matrix averaging unit and a covariance matrix generation unit are configured to perform, as the aforementioned predetermined process, an averaging process on each of elements in the first covariance matrix R(2m) and elements in the second covariance matrix R(2m+1). 1. A receiver , which receives a data signal and a control signal transmitted using a space frequency block coding scheme , comprising:a covariance matrix estimation unit that estimates a covariance matrix on the basis of the data signal;a covariance matrix generation unit that performs a predetermined process on the estimated covariance matrix;a reception weight generation unit that generates a reception weight by using the covariance matrix subjected to the predetermined process and the control signal; anda signal separation unit that separates the data signal from a received signal by using the generated reception weight and the control signal,wherein the data signal is configured to be transmitted in a space frequency block coding scheme unit including two resource elements,the estimated covariance matrix is configured to include a first covariance matrix including a desired signal component in an even-numbered resource element in the space frequency block coding scheme unit and a second covariance matrix including a desired signal component in an odd-numbered resource element in the space frequency ...

METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATION SYSTEM

The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes. 1. A transmitter comprising:a plurality of transmit antennas; andcircuitry configured to generate a channel coded data stream;wherein the circuitry is further configured to perform space frequency block coding (SFBC) encoding on the channel coded data stream in an open loop mode such that the SFBC encoding is performed using a plurality of pairs of orthogonal frequency division multiplexing (OFDM) sub-carriers, wherein a first pair of OFDM sub-carriers of an OFDM symbol is mapped to a first pair of antenna ports and a second pair of OFDM sub-carriers of the OFDM symbol is mapped to a second pair of antenna ports; andwherein the circuitry is further configured to transmit the SFBC encoded data over the plurality of pairs of OFDM sub-carriers using the plurality of transmit antennas as an OFDM signal.2. The transmitter of claim 1 , wherein a portion of the channel coded data stream that is SFBC encoded using the first pair of OFDM sub-carriers of the OFDM symbol is SFBC encoded independently of another portion of the channel ...

METHOD FOR TRANSMITTING CONTROL AND TRAINING SYMBOLS IN MULTI-USER WIRELESS COMMUNICATION SYSTEM

The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result. 1. A wireless communication method comprising:receiving a legacy short training field;receiving a legacy long training field;receiving a legacy signal field;receiving a first non-legacy signal field;receiving a second non-legacy signal field using a first subfield of the first non-legacy signal field, the first subfield of the first non-legacy signal field indicating a modulation and coding scheme of the second non-legacy signal field;receiving a non-legacy long training fields; andreceiving a data field.2. The method of claim 1 , wherein the first non-legacy signal field further comprises a second subfield indicating a number of symbols of the second non-legacy signal field.3. The method of claim 2 , wherein the first non-legacy signal field further comprises a third subfield indicating a number of symbols of the non-legacy long training fields.4. The method of claim 3 , wherein the second non-legacy signal field comprises a first subfield indicating a modulation and coding scheme of the data field.5. The method of claim 4 , wherein the second non-legacy signal field further comprises a ...

Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, and method therefor

A transmitting device is disclosed. The transmitting device includes a controller that groups a plurality of transmitters into a plurality of groups including three or more groups and a plurality of code units that generate different output streams based on a data stream with respect to the plurality of groups. The controller delivers the output streams to the plurality of groups.

METHOD AND APPARATUS FOR TRANSMITTING DATA

Embodiments of the present invention disclose a method and an apparatus for transmitting data, and the method includes: first setting at least two second resource groups in each first resource group of at least one first resource group, and setting at least two reference signals in each of the second resource groups; then encoding data to be transmitted and generating two data streams from the encoded data; then, mapping the two data streams onto an available resource element of two different antenna ports, in which the reference signals corresponding to the two different antenna ports are set on two different second resource groups; and finally, transmitting, on the available resource element of the two different antenna ports, data on the two antenna ports. The present invention is applicable to the field of communications systems. 111.-. (canceled)12. A method for receiving data , wherein at least two second resource groups are comprised in each first resource group of at least one first resource group , wherein each of the second resource groups is capable of bearing at least two reference signals , and the at least two reference signals are corresponding to different antenna ports , and wherein the second resource group comprises 12 resource elements (REs) , the method comprising:receiving data of two data streams and reference signals, wherein the two data streams are mapped onto REs of two different antenna ports and the reference signals corresponding to the two different antenna ports are borne on two different second resource groups of the first resource group; anddecoding the received data streams.13. The method of claim 12 , wherein the two different second resource groups are orthogonal to each other in time and frequency.14. The method of claim 12 , wherein the first resource group comprises two of the second resource group.15. The method of claim 12 , wherein the data is enhanced physical downlink control channel (E-PDCCH) data.16. The method of claim ...

METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING WITH UNEQUAL MODULATION AND CODING SCHEMES

A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream. 138-. (canceled)39. A method for implementing spatial data processing , the method comprising:selecting a first modulation and coding scheme, MCS, and a second MCS, wherein the selected first MCS comprises a first modulation scheme, and the selected second MCS comprises a second modulation scheme, and wherein the selected second modulation scheme is of higher order than the selected first modulation scheme;parsing encoded input data to generate a first spatial stream and a second spatial stream;mapping the encoded first spatial stream using the selected first modulation scheme associated with the selected first MCS;mapping the encoded second spatial stream using the selected second modulation scheme associated with the selected second MCS;performing space time block coding, STBC, on the mapped first spatial stream to generate a first space-time stream, a second space-time stream; andperforming STBC on the mapped second spatial stream to generate a third space-time stream and a fourth space-time ...

Data transmission method and apparatus

Embodiments of the present invention provide a data transmission method and apparatus, and the method includes: modulating to-be-sent information bits according to a lower order constellation diagram, and generating 4m lower order modulation symbols; multiplying a precoding matrix Q by a column vector including every four lower order modulation symbols in the 4m lower order modulation symbols, to obtain 4m to-be-sent higher order modulation symbols corresponding to a higher order constellation diagram; and respectively and correspondingly sending the 4m to-be-sent higher order modulation symbols on different carriers of two antennas. The to-be-sent higher order modulation symbols include some or all to-be-sent information bits. Therefore, the same signal can be simultaneously sent on different carriers of multiple antennas, and frequency diversity and space diversity are implemented, so that transceiving performance of data transmission is improved.

Method and apparatus for information transmission in a radio communication system

A method of transmitting, by a transmitter, information in a wireless communication system, the method includes generating first and second symbols; generating first and second transmit vectors on the basis of an Alamouti code from the first and second symbols; and transmitting the first transmit vector through a first antenna and transmitting the second transmit vector through a second antenna. The first transmit vector consists of a first transmit symbol and a second transmit symbol. The second transmit vector consists of a third transmit symbol and a fourth transmit symbol. The first, second, third, and fourth transmit symbols are transmitted based on first and second resource indexes. The first symbol is a first modulation symbol for first information, and the second symbol is a second modulation symbol for second information.

DATA RESOURCE MAPPING FOR FREQUENCY-CODED SYMBOLS

A device and method for communicating frequency-coded symbols that include data elements and reference symbols are disclosed. In one aspect, a carrier frequency band includes a plurality of subcarrier frequency bands. Data elements are transmitted and received on respective pairs of adjacent subcarrier frequency bands to provide diversity. Reference symbols are transmitted and received on predetermined subcarrier frequency bands. Muting is applied to selected subcarrier frequency bands based on the number and frequency configuration of the reference symbols. 128-. (canceled)29. A device comprising:a processor;a transmitter coupled to the processor; andat least one pair of antennas coupled to the transmitter, wherein the processor is configured to:identify one or more subcarrier frequency bands for transmitting one or more corresponding reference symbols;determine a number of available subcarrier frequency bands for transmitting data symbols;determine whether to transmit the data symbols on the available subcarrier frequency bands based at least in part on a predetermined rule, wherein the predetermined rule includes muting all of the plurality of subcarrier bands of the carrier frequency when the determined number of available subcarrier frequency bands is an odd number; andmute, in response to the determining whether to transmit, all of the plurality of subcarrier bands of the carrier frequency.30. The device according to claim 29 , wherein the predetermined rule further includes allowing transmission of data symbols on the available subcarrier frequency bands when the determined number of the available subcarrier frequency bands is an even number.31. The device according to claim 29 , wherein each of the data symbols is frequency coded using space frequency block coding (SFBC).32. The device according to claim 31 , wherein each of the SFBC-coded data symbols is included in an orthogonal frequency division multiplexing (OFDM) symbol.33. The device according to ...

First And Second Radio Nodes And Methods Therein, For Performing A Radio Communication

A first radio node (), a second radio node () and methods therein, for transmitting and receiving a data block in a radio network. The first radio node () selects () at least one of: 1) time diversity mode, 2) frequency diversity mode, and spatial diversity mode, based on a first comparison between an estimated signal quality of each diversity mode and a quality threshold, and/or a second comparison between an estimated round trip time of each diversity mode and a round trip time threshold. The first radio node () further performs () a first transmission of the data block, and the second radio node () identifies () the diversity mode(s) selected by the first radio node (). The first radio node () then performs () a second transmission of the data block according to the selected diversity mode(s) so that the second radio node () can decode () the data block by combining the first and second transmissions of the data block. 166-. (canceled)67. A method , performed by a first radio node , for transmitting a data block to a second radio node in a radio network , the method comprising the first radio node: 1) time diversity mode comprising transmitting the data block in multiple time intervals;', '2) frequency diversity mode comprising transmitting the data block on multiple frequencies, and', '3) spatial diversity mode comprising transmitting the data block from multiple locations;, 'selecting at least one diversity mode out of a first comparison between an estimated signal quality of each diversity mode and a quality threshold; and', 'a second comparison between an estimated round trip time of each diversity mode and a round trip time threshold;, 'wherein the selecting is based on at least one ofperforming a first transmission of the data block to the second radio node; andperforming at least a second transmission of the data block to the second radio node according to the selected at least one diversity mode.68. The method of claim 67 , wherein the selecting is ...

Wireless sc-fdma communications system

A device includes circuitry configured to determine feedforward and feedback coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based on previously received signals. The equalizer output is determined by applying the feedforward and feedback coefficients of the AFD-DFE to a received signal, and the feedforward and feedback coefficients of the AFD-DFE are updated based on the equalizer output.

WIRELESS SC-FDMA COMMUNICATIONS SYSTEM

A device includes circuitry configured to determine feedforward and feedback coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based on previously received signals. The equalizer output is determined by applying the feedforward and feedback coefficients of the AFD-DFE to a received signal, and the feedforward and feedback coefficients of the AFD-DFE are updated based on the equalizer output. 1: A wireless device SC-FDMA communications system , comprising:a wireless device comprising a transmitter to transmit an RF signal, anda base station comprising a receiver to receive the RF signal, generate a plurality of signal matrices based on received signals,', 'determine feedforward coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based in part on the signal matrices,', 'generate a plurality of decision matrices based on transformed feedforward coefficients,', 'determine feedback coefficients for the AFD-DFE based in part on the plurality of decision matrices,', 'generate a first matrix having the plurality of signal matrices and the decision matrices,', 'generate a second matrix including the feedforward coefficients and a third matrix including the feedback coefficients of the AFD-DFE,', 'determine an equalizer output as a function of the first matrix, the second matrix and the third matrix such that the function includes adding a first product comprising the plurality of signal matrices premultiplied by a variation of the second matrix and a second product comprising the plurality of decision matrices being premultiplied by a variation of the third matrix, wherein the equalizer output is determined for Spatially-Multiplexed (SM)SC-FDMA signals', 'update the feedforward and feedback coefficients of the AFD-DFE based on the equalizer output,', 'equalize the received signals using the equalizer output, and', 'decode the equalized signals., 'wherein the wireless device comprises circuitry configured to'}2 ...

DOWNLINK DATA TRANSMISSION METHOD, EQUIPMENT, AND SYSTEM

Disclosed are a downlink data transmission method, equipment, and system, used for reducing the data transmission pressure of a data forward transmission interface. The method comprises: first equipment receives, by means of a forward transmission interface, data of a scheduled terminal sent by second equipment, the data of the scheduled terminal being data obtained after the second equipment performs first spatial preprocessing on baseband data of the scheduled terminal; the first equipment performs second spatial preprocessing on the data of the scheduled terminal; and the first equipment converts the data, obtained after second spatial preprocessing, into a radio-frequency signal, and sends the radio-frequency signal. 1. A method for transmitting downlink data , the method comprising:receiving, by a first device, data of a scheduled terminal transmitted by a second device via a fronthaul interface, wherein the data of the scheduled terminal are data obtained by the second device via performing first space-domain preprocessing on baseband data of the scheduled terminal;processing, by the first device, second space-domain preprocessing on the data of the scheduled terminal; andconverting, by the first device, data obtained as a result of the second space-domain preprocessing into a radio frequency signal, and transmitting the radio frequency signal.2. The method according to claim 1 , wherein the first space-domain preprocessing at least comprises: scrambling and modulating the baseband data of the scheduled terminal; andthe second space-domain preprocessing at least comprises: performing beam-forming or pre-coding processing on the data of the scheduled terminal.3. The method according to claim 2 , wherein the method further comprises:receiving, by the first device, a resource allocation scheme of the scheduled terminal, and a beam-forming vector or a pre-coding matrix used by the scheduled terminal in the resource allocation scheme, transmitted by the second ...

TRANSMITTER AND RECEIVER AND METHODS OF TRANSMITTING AND RECEIVING

A transmitter transmits payload data using Orthogonal Frequency Division Multiplexed (OFDM) symbols, the transmitter including a frame builder to receive the payload data and to receive signalling data for use in detecting and recovering the payload data at a receiver, and to form the payload data into data-units for transmission. A modulator modulates plural sub-carriers of one or more OFDM symbols with the signalling data and the payload data in accordance with a modulation scheme to provide for each of plural sub-carriers a modulation symbol, a prefixing circuit prefixes a guard interval to the one or more OFDM symbols, and a transmission circuit transmits the one or more OFDM symbols. The modulator includes an I/Q interleaver to receive a real component of the modulation symbol of each of the one or more sub-carriers and to interleave the real component of the modulation symbols differently to the imaginary component. 1. A transmitter for transmitting payload data using Orthogonal Frequency Division Multiplexed (OFDM) symbols , the transmitter comprisinga frame builder configured to receive the payload data to be transmitted and to receive signalling data for use in detecting and recovering the payload data at a receiver, and to form the payload data into data-units for transmission,a modulator configured to modulate a plurality of sub-carriers of one or more OFDM symbols with the signalling data and the payload data in accordance with a modulation scheme to provide for each of the plurality of sub-carriers a modulation symbol,a prefixing circuit configured to prefix a guard interval to the one or more OFDM symbols, anda transmission circuit configured to transmit the one or more OFDM symbols, wherein the modulator includes a I/Q interleaver, which is configured to receive real and imaginary components of the modulation symbols for each of the one or more sub-carriers of the one or more OFDM symbols and to interleave the real component of the modulation symbols ...

METHOD AND APPARATUS FOR TRANSMITTING DATA

Embodiments of the present invention disclose a method and an apparatus for transmitting data, and the method includes: first setting at least two second resource groups in each first resource group of at least one first resource group, and setting at least two reference signals in each of the second resource groups; then encoding data to be transmitted and generating two data streams from the encoded data; then, mapping the two data streams onto an available resource element of two different antenna ports, in which the reference signals corresponding to the two different antenna ports are set on two different second resource groups; and finally, transmitting, on the available resource element of the two different antenna ports, data on the two antenna ports. The present invention is applicable to the field of communications systems. 1. A method for receiving data , comprising:receiving, by first user equipment (UE), two streams and reference signals associated with the two streams, wherein at least two second resource groups are comprised in a first resource group, wherein each of the second resource groups comprises one or more time and frequency resources and is capable of bearing at least two reference signals, wherein the at least two reference signals correspond to different antenna ports, wherein the two streams respectively correspond to two different antenna ports which the reference signals associated with the two streams respectively correspond to and the reference signals associated with the two streams are respectively borne on two different second resource groups of the first resource group, wherein the two different antenna ports are respectively from antenna ports corresponding to the two different second resource groups and used by the first UE and an antenna port that is other than the two antenna ports used by the first UE and that is from the antenna ports corresponding to the at least two second resource groups is capable of supporting stream ...

Simultaneous Transmission of Data Units in Multiple Frequency Segments

A first aggregated MAC protocol data unit (A-MPDU) is generated for transmission over a first frequency segment of a communication channel, and a second A-MPDU is generated for transmission over a second frequency segment of the communication channel. A PHY protocol data unit (PPDU) is generated to include the plurality of A-MPDUs and a second PPDU is generated to include the second A-MPDU. A first transmit processor generates a first RF signal for transmission of the first PPDU over the first frequency segment and a second transmit processor generates a second RF signal for transmission of the second PPDU over the second frequency segment. The first RF signal is transmitted in the first frequency segment simultaneously with the second RF signal being transmitted in the second frequency segment. 1. A method for simultaneous transmission of data over a plurality of frequency segments of a communication channel , the method comprising:generating, at one or more synchronized control (MAC) processors implemented on one or more integrated circuit (IC) devices, a plurality of aggregated MAC protocol data units (A-MPDUs) for transmission over the plurality of frequency segments, including generating at least a first A-MPDU for transmission over a first frequency segment among the plurality of frequency segments and a second A-MPDU for transmission over a second frequency segment among the plurality of frequency segments;providing, with the one or more synchronized MAC processors, the plurality of A-MPDUs to one or more physical layer (PHY) processors implemented on the one or more IC devices, the one or more PHY processors including at least a first transmit processor corresponding to the first frequency segment and a second transmit processor corresponding to the second frequency segment;generating, with the one or more PHY processors, a plurality of PHY protocol data units (PPDUs) to include the plurality of A-MPDUs, including i) generating a first data portion of a ...

SYSTEM AND METHOD FOR APPLYING ADAPTIVE FREQUENCY-DOMAIN RLS DFE FOR UPLINK SC-FDMA

A device includes circuitry configured to determine feedforward and feedback coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based on previously received signals. The equalizer output is determined by applying the feedforward and feedback coefficients of the AFD-DFE to a received signal, and the feedforward and feedback coefficients of the AFD-DFE are updated based on the equalizer output. 1. A device comprising: determine feedforward and feedback coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based on previously received signals,', 'determine an equalizer output by applying the feedforward and feedback coefficients of the AFD-DFE to a received signal, and', 'update the feedforward and feedback coefficients of the AFD-DFE based on the equalizer output., 'circuitry configured to'}2. The device of claim 1 , wherein the circuitry is further configured to determine the feedforward and feedback coefficients based on a recursive least squares (RLS) calculation.3. The device of claim 2 , wherein the circuitry is further configured to determine the RLS calculation with at least one constraint.4. The device of claim 1 , wherein the circuitry is further configured to apply a three-tap AFD-DFE to the received signal.5. The device of claim 1 , wherein the circuitry is further configured to operate in a training mode wherein the feedforward and feedback coefficients of the AFD-DFE are updated based on a training signal.6. The device of claim 5 , wherein the circuitry is further configured to update the feedforward and feedback coefficients of the AFD-DFE based on a difference between the training signal and the equalizer output.7. The device of claim 6 , wherein the circuitry is further configured to determine that convergence has occurred when the difference between the training signal and the equalizer output is less than a predetermined threshold.8. The device of claim 1 , wherein the circuitry is ...

Method and apparatus for combining space-frequency block coding, spatial multiplexing and beamforming in a mimo-ofdm system

A method and apparatus for combining space-frequency block coding (SFBC) in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system is described herein. A transmitter, according to one embodiment, may include four antennas and circuitry configured to transmit in an OFDM symbol time period using both frequency diversity and SFBC. For frequency diversity at least one first data element may be repeated producing at least two second data elements and the two second data elements are transmitted using different subcarriers. For space frequency block coding, a pair of third data elements may be space frequency block coded producing four fourth data elements. The four fourth data elements may be transmitted using two subcarriers and only two of the four antennas.

METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME

A method for transmitting an uplink control channel from a UE to an eNB in a wireless communication system is disclosed. The method comprises the steps of classifying each of a plurality of resource blocks allocated to a system bandwidth into a plurality of sub-resource blocks; mapping the uplink control channel into a first sub-resource block of a minimum index and a second sub-resource block of a maximum index in accordance with a transmission diversity scheme; and transmitting the uplink control channel to the eNB. 1. A method for transmitting an uplink control channel from a user equipment (UE) to an eNodeB (eNB) in a wireless communication system , the method comprising:classifying each of a plurality of resource blocks (RBs) allocated to a system bandwidth into a plurality of sub-resource blocks (sub-RBs);mapping the uplink control channel into a first sub-resource block (sub-RB) of a minimum index and a second sub-RB of a maximum index in accordance with a transmission diversity scheme; andtransmitting the uplink control channel to the eNB.2. The method according to claim 1 , wherein the sub-RBs include 4 or 6 subcarriers.3. The method according to claim 1 , wherein a maximum transmission power for transmitting the uplink control channel is maintained uniformly regardless of the number of the plurality of RBs.4. The method according to claim 1 , wherein the step of mapping the uplink control channel includes:generating a control information sequence for uplink control information and a reference signal sequence for a reference signal on the basis of a number of first resource elements for the uplink control information and a number of second resource elements for the reference signal, wherein the first resource elements and the second resource elements are included in at least one of the first sub-RB and the second sub-RB; andmapping the generated control information sequence into the first resource elements and mapping the generated reference signal sequence ...

TERMINAL DEVICE, INFRASTRUCTURE EQUIPMENT, METHODS AND INTEGRATED CIRCUITRY

A terminal device, infrastructure equipment, methods and integrated circuitry for use with a wireless telecommunications network. The terminal device comprises a receiver configured to receive a first signal, the first signal being transmitted using a first number of antenna ports and encoded according to the first number of antenna ports, the first number of antenna ports being predetermined, and to receive a second signal, the second signal being transmitted using a second number of antenna ports and encoded according to the second number of antenna ports, the second number of antenna ports being indicated by the first signal. The terminal device also comprises a controller that configures the receiver to decode the first signal using the predetermined first number of antenna ports, and decode the second signal using the second number of antenna ports indicated by the first signal. 1. A terminal device for use with a wireless telecommunications network , the terminal device comprising: to receive a first signal, the first signal being transmitted using a first number of antenna ports and encoded according to the first number of antenna ports, the first number of antenna ports being predetermined, and', 'to receive a second signal, the second signal being transmitted using a second number of antenna ports and encoded according to the second number of antenna ports, the second number of antenna ports being indicated by the first signal; and, 'a receiver configureda controller configured to decode the first signal using the predetermined first number of antenna ports, and decode the second signal using the second number of antenna ports indicated by the first signal.2. The terminal device according to claim 1 , wherein the first signal is transmitted using a Narrow Band Physical Broadcast Channel (NB-PBCH) claim 1 , and the second signal is transmitted using one of a Narrow Band Physical Downlink Control Channel (NB-PDCCH) and a Narrow Band Physical Downlink Shared ...

Data Transmission Method and Apparatus

A method includes determining, by a first device, a first resource set and a second resource set in a first transmission subframe; determining a data transmission manner on the first resource set and the second resource set; and implementing data transmission with a second device based on the determined data transmission manner by using the first transmission subframe, where the first resource set is a set of remaining resource elements other than resource elements paired based on a first pairing rule in all resource elements used for data transmission in the first transmission subframe, and the second resource set is a set of the resource elements paired based on the first pairing rule in the first transmission subframe.

DATA TRANSMISSION METHOD AND APPARATUS

Embodiments of the present invention provide a data transmission method and apparatus, and the method includes: modulating to-be-sent information bits according to a lower order constellation diagram, and generating 4m lower order modulation symbols; multiplying a precoding matrix Q by a column vector including every four lower order modulation symbols in the 4m lower order modulation symbols, to obtain 4m to-be-sent higher order modulation symbols corresponding to a higher order constellation diagram; and respectively and correspondingly sending the 4m to-be-sent higher order modulation symbols on different carriers of two antennas. The to-be-sent higher order modulation symbols include some or all to-be-sent information bits. Therefore, the same signal can be simultaneously sent on different carriers of multiple antennas, and frequency diversity and space diversity are implemented, so that transceiving performance of data transmission is improved. 1. A method of receiving data , comprising:performing channel equalization on signals that are received by two antennas on a first subcarrier to obtain 2m estimated values of first higher order modulation symbols;performing channel equalization on signals that are received by the two antennas on a second subcarrier to obtain 2m estimated values of second higher order modulation symbols;demodulating the 2m estimated values of first higher order modulation symbols in a mapping manner of a higher order constellation diagram to obtain a first estimated value of information bits sent by a transmit end;demodulating the 2m estimated values of second higher order modulation symbols in the mapping manner of the higher order constellation diagram to obtain a second estimated value of the information bits sent by the transmit end; andcombining the first estimated value of the information bits sent by the transmit end and the second estimated value of the information bits sent by the transmit end to obtain an estimated value of the ...

Selective Symbol Repetition for SFBC on sPDCCH

When the number of Spatial Block Coded (SBC) modulation symbols in a Physical Resource Block (PRB) is not divided evenly by the number of SBC antenna ports, an SBC coded modulation symbol of a group of SBC coded modulation symbols is repeated, where the same Resource Element (RE) location is repeated on all antennas. In some embodiments, the repeated symbol is adjacent to a modulation symbol of the group that is not repeated. In other embodiments, the repeated modulation symbol is in an adjacent subcarrier to the subcarrier that carries the modulation symbol that is repeated. RE groups with relatively larger numbers of non-zero modulation symbols on a given antenna port and PRB occupy different antenna ports in different PRBs. 131-. (canceled)32. A method , performed by a base station operative in a wireless communication network , of selectively repeating a modulation symbol in an antenna diversity transmission of a control channel , the method comprising: each plurality of RE groups is associated with an antenna port;', 'one or more RE groups of each plurality of RE groups comprise M REs, and at least one RE group of each plurality of RE groups comprises N1 REs; and', 'groups of modulation symbols correspond to the RE groups;, 'dividing a plurality of Resource Elements (REs) into multiple pluralities of RE groups, whereinfor each plurality of RE groups, repeating a modulation symbol of a group of modulation symbols corresponding to the RE group of N1 REs; andtransmitting the modulation symbols within each plurality of RE groups on the antenna port associated with the plurality of RE groups.33. The method of claim 32 , wherein N1 differs from M.34. The method of claim 32 , further comprising:transmitting the copied modulation symbol in a subcarrier adjacent to a subcarrier in which a modulation symbol that is not copied is transmitted.35. The method of claim 32 , wherein the copied modulation symbol occupies the last RE of the group of N1 REs claim 32 , and the ...

PARALLEL BIT INTERLEAVER

A bit interleaving method involves applying a bit permutation process to bits of a QC-LDPC codeword made up of N cyclic blocks each including Q bits, and dividing the codeword after the permutation process into a plurality of constellation words each including M bits, the codeword being divided into F×N′/M folding sections (N′ being a subset of N selected cyclic blocks and being a multiple of M/F), each of the constellation words being associated with one of the F×N′/M folding sections, and the bit permutation process being applied such that each of the constellation words includes F bits from each of M/F different cyclic blocks in a given folding section associated with a given constellation word. 1. A bit interleaving method for interleaving bits of a codeword generated based on a low-density parity check coding scheme , a parity-check matrix of the low-density parity check coding scheme having a quasi-cyclic structure , the bit interleaving method comprising:applying a bit permutation process to the codeword made up of N cyclic blocks each consisting of Q bits, to reorder the bits of the codeword in accordance with a bit permutation rule defining a reordering of the bits;dividing the codeword after the bit permutation process into a plurality of constellation words, each of the constellation words being made up of M bits; and N is not a multiple of M,', 'the bit permutation rule is a rule for applying column-row permutation of writing the Q bits in each of N′=N −X cyclic blocks of the N cyclic blocks in a row direction to a row among M rows of a matrix and reading in a column direction, where X is a remainder of N divided by M, and', 'X cyclic blocks include a cyclic block in a parity section of the codeword., 'mapping each of the constellation words onto a modulated signal, wherein'}2. A signal processing method for processing a signal transmitted by modulating N×Q/M constellation words , the constellation words being generated by applying a bit reordering ...

Apparatus and method for reusing resources in extended bandwidth

Processing circuitry, which is configured to process a wireless signal received through at least one antenna, includes: at least one segment deparser configured to generate a data stream from segments respectively corresponding to different frequency bands; at least one rearranger configured to rearrange the data stream to generate a rearranged data stream; and a stream deparser configured to generate a bitstream based on the data stream or the rearranged data stream according to a reception mode, the reception mode being defined based on a bandwidth and multiple-input and multiple-output (MIMO) used for transmission of the wireless signal.

MIMO WLAN system

A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration.

Transmit diversity in a wireless communication system

A method for transmitting data via multiple antennas by modulating data to be transmitted into a plurality of modulated symbols, encoding each pair of modulated symbols from among said plurality of symbols in accordance with a transmission diversity scheme to result in a plurality of N by N matrices, with each N by N matrix corresponding to each pair of modulated symbols, generating a M by M code matrix comprised of the plurality of N by N matrices, orthogonally spreading the M by M code matrix to generate an output matrix, generating a plurality of row-permuted matrices by exchanging at least one pair of rows in the output matrix, and transmitting the symbols in the plurality of row-permuted matrices via a plurality of antennas by using either a space time transmission diversity scheme, a space frequency transmission diversity scheme, or a combination of a space time transmission diversity scheme and a space frequency transmission diversity scheme.

Pilot boosting and traffic to pilot ratio estimation in a wireless communication system

Methods and circuits for assigning pilot boosting factors and calculating traffic to pilot ratios in a wireless communication system. The data to be transmitted is first modulated to generate a plurality of data modulation symbols. The plurality of data modulation symbols and a plurality of reference signal symbols are mapped into transmission resources of each of a plurality of antennas in accordance with a transmit diversity scheme. The transmission resources of each of the antennas are divided into a plurality of subcarriers in a frequency domain and a plurality of time units in a time domain. Then, a power scaling factor are assigned for data modulation symbols on each of the antennas in dependence upon power levels of the reference signal symbols to maintain a fixed power level across the plurality of antennas in each time unit. Finally, the data modulation symbols and the reference signal symbols are transmitted via the plurality of antennas in accordance with the mapping scheme and the assigned scaling factors.

Method and apparatus for resource management in a wireless communication system

Systems and methodologies are described that facilitate improved resource management in a wireless communication system. As described herein, supergroups can be formed from groups of Physical Hybrid Automatic Repeat Request Channels (PHICHs) such that respective PHICH supergroups are multiplexed onto respective non-overlapping resource element subsets, thereby improving resource usage efficiency for the extended cyclic prefix case and limited numbers of transmit antennas. In one example described herein, even-indexed PHICH groups are mapped to a selected subset of resource elements in a group while odd-indexed PHICH groups are mapped to the remaining resource elements in the group. This mapping can be performed by modifying orthogonal sequences associated with the PHICH groups and/or by performing resource mapping in different manners for respective PHICH supergroups. Upon receiving a transmission of mapped PHICH information, a receiving entity can leverage knowledge of the mapping to decode transmitted PHICH information using the proper resource subset(s).

无线通信系统中用于资源管理的方法和装置

本发明描述了用于在无线通信系统中帮助实现改进资源管理的系统和方法。如本发明所描述的，可以从物理混合自动重传请求信道(PHICH)组中形成超组，以使各PHICH超组在互不重叠的各资源元素子集上进行复用，从而在扩展的循环前缀的情况和发射天线数目受限的情况下，改善资源使用效率。在本发明描述的一个例子中，将具有偶数索引的PHICH组映射到从一组资源元素中选出的资源元素子集，将具有奇数索引的PHICH组映射到该组中剩余的资源元素。这个映射可以通过修改与所述PHICH组相关的正交序列的方式和/或通过对各PHICH超组执行不同的资源映射方式来执行。在接收到映射的PHICH信息的传输后，接收实体可以利用所述映射的信息，使用合适的资源子集对发送的PHICH信息进行解码。

System of wireless local computer network with multiple inputs and multiple outputs

FIELD: radio engineering, communications. SUBSTANCE: wireless system applies multiplexing with orthogonal frequency division (OFDM) and duplexing with time division (TDD). The system uses a channel structure with several configurable transport channels, supports many speeds of transfer and modes of transfer, which may be configured on the basis of channel conditions and capabilities of user terminals, applies pilot structures with several types of a pilot-signal for different functions, realises circuits of transfer speed, synchronisation and capacity control for proper operation of the system, and uses random access for access to the system by user terminals, quick confirmation and quick assignment of resources. Calibration may be carried out to take into account differences in frequency responses of transfer/reception circuits in a point of access and user terminals. Spatial processing may then be simplified by using preferences of reversible nature in uplinks and downlinks and calibration. EFFECT: invention provides for multiple speeds of transfer and modes of transfer. 21 cl, 33 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 485 698 (13) C2 (51) МПК H04L 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2008121016/07, 24.10.2003 (72) Автор(ы): УОЛТОН Дж. Родни (US), УОЛЛЭЙС Марк С. (US), КЕТЧУМ Джон У. (US), ГОВАРД Стивен Дж. (US) (24) Дата начала отсчета срока действия патента: 24.10.2003 (73) Патентообладатель(и): КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) 2 4 8 5 6 9 8 (43) Дата публикации заявки: 10.12.2009 Бюл. № 34 (45) Опубликовано: 20.06.2013 Бюл. № 17 2 4 8 5 6 9 8 R U Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. А.В.Мицу, рег.№ 364 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: US 2002/0154705 A1, 24.10.2002. RU 2141168 C1, 10.11.1999. WO 01/76110 A2, 11.10.2001. (54) СИСТЕМА БЕСПРОВОДНОЙ ЛОКАЛЬНОЙ ...

Multi input multi output wifi system

본 발명은 MIMO, OFDM 및 TDD를 이용하는 다중 액세스 MIMO WLAN 시스템에 관한 것으로서, (1) 다수의 구성 가능 전송 채널을 갖는 채널 구조를 이용하고, (2) 채널 상태 및 사용자 단말 능력에 따라서 구성 가능한 다중 레이트 및 송신 모드를 지원하며, (3) 다양한 기능을 위해 여러 가지 타입의 파일럿(예를 들면 비컨 파일럿, MIMO, 스티어링 참조, 캐리어 파일럿)을 이용하고,(4) 적절한 시스템 동작을 위해 레이트, 타이밍, 전력 제어 루프를 구현하며,(5) 사용자 단말에 의한 랜덤 액세스, 신속한 승인, 및 신속한 자원 할당을 위해 랜덤 액세스를 이용한다. 액세스 포인트와 사용자 단말에서의 송수신 체인 간의 주파수 응답을 보상하기 위해 교정을 수행하고, 다운링크와 업링크의 가역 특성과 상기 교정의 이점을 이용하여 이후 공간 처리를 단순화할 수 있다. The present invention relates to a multiple access MIMO WLAN system using MIMO, OFDM, and TDD, comprising: (1) a channel structure with multiple configurable transport channels, and (2) multiple configurable according to channel conditions and user terminal capabilities. Support rate and transmission mode, (3) use different types of pilots (e.g. beacon pilot, MIMO, steering reference, carrier pilot) for various functions, and (4) rate, timing for proper system operation Implement a power control loop, and (5) use random access for random access, quick grants, and fast resource allocation by the user terminal. Calibration may be performed to compensate for the frequency response between the access point and the transmit / receive chain at the user terminal, and the subsequent spatial processing may be simplified using the reversible characteristics of the downlink and uplink and the benefits of the calibration.

Method for processing spatial distribution for multi-antenna communication system

FIELD: methods for processing data for distribution during transmission in multi-antenna communication system. SUBSTANCE: for spatial distribution in multi-antenna OFDM system the transmitter conducts encoding, interleaving and indication of symbols for traffic data to produce data symbols, the transmitter processes each pair of data symbols to produce two pairs of transmitted symbols for transmission through a pair of antennas either (1) in two periods of OFDM symbol for spatial-temporal distribution during transmission, or (2) in two sub-ranges for spatial-temporal distribution during transmission. For data transmission, NT(NT-1)/2 various pairs of antennas are used, where various pairs of antennas are used for adjacent sub-ranges, where NT represents the number of antennas, the system may maintain a set of sizes of OFDM symbols, for various sizes of OFDM symbols, identical circuits are used for encoding, interleaving and modulation to facilitate processing in transmitter and receiver, the transmitter performs OFDM modulation for the stream of transferred symbols for each antenna according to selected size of OFDM symbol, the receiver conducts complementary processing. EFFECT: ensured spatial distribution. 8 cl, 11 dwg ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 321 951 (13) C2 (51) ÌÏÊ H04B 7/204 (2006.01) H04J 11/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (72) Àâòîð(û): ÓÎËÒÎÍ Äæåé Ð. (US), ÊÅÒ×ÓÌ Äæîí Ó. (US), ÓÎËËÝÉÑ Ìàðê (US), ÃÎÂÀÐÄ Ñòèâåí Äæ. (US) (21), (22) Çà âêà: 2005115854/09, 27.10.2003 (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 27.10.2003 (73) Ïàòåíòîîáëàäàòåëü(è): ÊÂÝËÊÎÌÌ ÈÍÊÎÐÏÎÐÅÉÒÅÄ (US) (43) Äàòà ïóáëèêàöèè çà âêè: 10.10.2005 R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 25.10.2002 (ïï.1-52) US 60/421,309 (45) Îïóáëèêîâàíî: 10.04.2008 Áþë. ¹ 10 2 3 2 1 9 5 1 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: ÅÐ 1241824 À1, 18.09.2002. RU 2158479 Ñ2, 27.10.2000. ÅÐ ...

data transmission method and hybrid automatic repeat request method using adaptive mapper

The data transmission method performs bit-by-bit remapping on the signal constellation to form a plurality of data symbols. The plurality of data symbols are modulated and transmitted. Remapping of signal constellations allows for additional diversity gain while gaining spatio-temporal diversity gain on the channel without additional complexity. This is easy to apply without changing the receiver structure according to the prior art. Mapper, diversity, MIMO, HARQ, composite automatic retransmission,

data retransmission method for improving diversity gain

다이버시티 이득을 높이는 데이터 재전송 방법을 제공한다. 초기 전송 블록을 전송하고, 상기 초기 전송 블록에 대한 재전송 요청 신호를 수신한다. 상기 재전송 요청 신호에 따라 상기 초기 전송 블록을 구성하는 비트 간의 교환 또는 역산을 통해 재맵핑한 재전송 전송 블록을 생성한다. 상기 재전송 전송 블록을 전송한다. 비트의 채널 신뢰도를 평균적으로 향상시킬 수 있고, 재전송시 신호 성상 상의 비트별 맵핑을 시간 및/또는 공간 다중화를 고려하여 수행함으로써 채널의 변화에 따른 맵핑 다이버시티를 확보할 수 있다. A data retransmission method for increasing diversity gain is provided. Transmit an initial transport block and receive a retransmission request signal for the initial transport block. The retransmission transport block is generated by remapping through inversion or inversion between bits constituting the initial transport block according to the retransmission request signal. Transmit the retransmission transport block. The channel reliability of bits can be improved on average, and mapping diversity according to channel changes can be secured by performing bit-by-bit mapping on signal properties in consideration of time and / or spatial multiplexing during retransmission.

System of wireless local computer network with multiple inputs and multiple outputs

FIELD: radio engineering, communications. SUBSTANCE: system applies multiplexing with orthogonal frequency division (OFDM) and duplexing with time division (TDD). The system uses a channel structure with several configurable transport channels, supports many speeds of transfer and modes of transfer, which may be configured on the basis of channel conditions and capabilities of user terminals, applies pilot structures with several types of a pilot-signal (for instance, beacon, MIMO, controlled reference and pilot signal of a carrier) for different functions, realises circuits of transfer speed, synchronisation and capacity control for proper operation of the system, and uses random access for access to the system by user terminals, quick confirmation and quick assignment of resources. Calibration may be carried out to take into account differences in frequency responses of transfer/reception circuits in a point of access and user terminals. Spatial processing may then be simplified by using preferences of reversible nature in uplinks and downlinks and calibration. EFFECT: invention provides for multiple speeds of transfer and modes of transfer. 14 cl, 33 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 485 697 (13) C2 (51) МПК H04L 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2008121015/07, 24.10.2003 (72) Автор(ы): УОЛТОН Дж. Родни (US), УОЛЛЭЙС Марк С. (US), КЕТЧУМ Джон У. (US), ГОВАРД Стивен Дж. (US) (24) Дата начала отсчета срока действия патента: 24.10.2003 (73) Патентообладатель(и): КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) 2 4 8 5 6 9 7 (43) Дата публикации заявки: 10.12.2009 Бюл. № 34 (45) Опубликовано: 20.06.2013 Бюл. № 17 2 4 8 5 6 9 7 R U Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. А.В.Мицу, рег.№ 364 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: US 2002/0154705 A1, 24.10.2002. RU 2141168 C1, 10.11.1999. WO 01 ...

Apparatus and method for generating simbol for multiple antennas

낮은 수신 복잡도를 가지며 안테나 수의 증가에 유연성을 가지는 다중 안테나를 위한 심볼 생성 장치가 개시된다. 심볼 생성 장치는 복수의 채널에 각각 대응하는 복수의 시공간 채널 부호화기와 푸리에 역변환기 그룹을 포함한다. 각각의 시공간 채널 부호화기는 대응하는 채널로부터 디지털 변조된 심볼 그룹을 입력받아 복수의 공간 영역 및 하나 이상의 시간 영역에 대하여 시공간 부호화하고 복수의 위상값으로 위상 이동시켜 복수의 위상 이동된 시공간 코드워드를 생성한다. 그리고 푸리에 역변환기 그룹은 복수의 채널에 각각 대응하는 복수의 부반송파에서 상기 복수의 위상 이동된 시공간 코드워드를 가지고 푸리에 역변환을 수행하여 복수의 푸리에 역변환된 신호를 생성한다. Alamouti, Cylic delay diversity(CCD), Cylic shift diversity(CSD), Space-frequency block code(SFBC), Space-time block code(STBC) Disclosed is a symbol generation apparatus for multiple antennas having low reception complexity and flexibility in increasing the number of antennas. The symbol generation apparatus includes a plurality of space-time channel encoders and Fourier inverse transformer groups respectively corresponding to the plurality of channels. Each space-time channel coder receives a digitally modulated group of symbols from a corresponding channel and performs space-time encoding on a plurality of space domains and one or more time domains and phase shifts the plurality of phase values to generate a plurality of phase-shifted space-time codewords. do. The Fourier inverse transformer group generates Fourier inverse transformed signals by performing Fourier inverse transform with the plurality of phase shifted space-time codewords on a plurality of subcarriers respectively corresponding to a plurality of channels. Alamouti, Cylic delay diversity (CCD), Cylic shift diversity (CSD), Space-frequency block code (SFBC), Space-time block code (STBC)

Wireless local area network system with multiple inputs and multiple outputs

FIELD: information technology. SUBSTANCE: system uses channel structure with several configurable transport channels. The system supports multiple data transmission speed values and modes, which can be configured on the basis of channel conditions and user terminal perfromance level. The system also uses pilot structures with several pilot signal type, for instance, beacon (MIMO), controlled template and carrier pilot signal) for different functions, implements transmission speed , synchronisation and power control circuits to provide appropriate system operation, and uses random access for system access by user terminals, fast acknowledgement and quick resource assignment. To compensate for differences in frequency response of transmission/receiving circuits, calibration can be performed in access point and user terminals. Three-dimensional processing can be facilitated using advantages of downstream and upstream lines, as well as calibration. EFFECT: increase of transmission bandwidth capacity. 18 cl, 33 dwg, 36 tbl ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 335 852 (13) C2 (51) ÌÏÊ H04L 1/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (72) Àâòîð(û): ÓÎËÒÎÍ Äæ. Ðîäíè (US), ÓÎËËÝÉÑ Ìàðê Ñ. (US), ÊÅÒ×ÓÌ Äæîí Ó. (US), ÃÎÂÀÐÄ Ñòèâåí Äæ. (US) (21), (22) Çà âêà: 2005115862/09, 24.10.2003 (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 24.10.2003 (73) Ïàòåíòîîáëàäàòåëü(è): ÊÂÝËÊÎÌÌ ÈÍÊÎÐÏÎÐÅÉÒÅÄ (US) (43) Äàòà ïóáëèêàöèè çà âêè: 20.01.2006 R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 25.10.2002 US 60/421,309 (45) Îïóáëèêîâàíî: 10.10.2008 Áþë. ¹ 28 2 3 3 5 8 5 2 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: WO 02078211 À, 03.10.2002. RU 2141168 C1, 10.11.1999. US 6452981 Â1, 17.09.2002. WO 0176110 À, 11.10.2001. (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 25.05.2005 2 3 3 5 8 5 2 R U (87) Ïóáëèêàöè PCT: WO 2004/039011 (06.05.2004) C 2 C 2 (86) Çà âêà PCT: US 03/34514 (24.10.2003) Àäðåñ äë ...

Method for transmitting control and training symbol in multiple user wireless communication system

본 발명은 다중 사용자 무선 통신 시스템에서 전송 효율 향상을 위한 제어 및 훈련 심볼 전송 방법 및 장치에 대한 것이다. 본 발명의 일 실시 예에 따른 방법은, 다중 사용자 무선 통신 시스템에서 제어 및 훈련 심볼 전송 방법으로, 동시에 서로 다른 데이터를 각 단말들로 전송할 시 각 데이터들의 요구 전송률이 각 단말들에서 채널 추정을 통해 만족할 수 있는지를 판단하는 과정과, 상기 판단 결과 각 데이터의 요구 전송률이 만족되지 않는 경우 상기 제어 및 훈련 심볼을 시간, 주파수, 코드 영역의 조합을 이용하여 단말별로 구분할 수 있도록 데이터 프레임을 구성하여 각 단말별로 전송하는 과정을 포함한다. The present invention relates to a control and training symbol transmission method and apparatus for improving transmission efficiency in a multi-user wireless communication system. The method according to an embodiment of the present invention is a control and training symbol transmission method in a multi-user wireless communication system. When transmitting different data to each terminal at the same time, the required data rate of each data is determined through channel estimation at each terminal. Determining whether it can be satisfied, and when the requested transmission rate of each data is not satisfied, the data frame is configured to distinguish the control and training symbols for each terminal using a combination of time, frequency, and code region. It includes the process of transmitting for each terminal.

다중 사용자 무선 통신 시스템에서 제어 및 훈련 심볼 전송 방법

본 발명은 다중 사용자 무선 통신 시스템에서 전송 효율 향상을 위한 제어 및 훈련 심볼 전송 방법 및 장치에 대한 것이다. 통신 방법은, 레거시 숏 트레이닝 필드(legacy short training field, L-STF)를 송신하는 단계, 레거시 롱 트레이닝 필드(legacy long training field, L-LTF)를 송신하는 단계, 레거시 시그널 필드(legacy signal field)를 송신하는 단계, 제1 논-레거시 시그널 필드(first non-legacy signal field)를 송신하는 단계, 상기 제1 논-레거시 시그널 필드의 제1 서브필드(subfield)에 의해 지시되는 MCS(modulation and coding scheme)에 따라 생성된 제2 논-레거시 시그널 필드를 송신하는 단계, 논-레거시 롱 트레이닝 필드(non-legacy long training field, L-LTF)를 송신하는 단계, 및 데이터 필드를 송신하는 단계를 포함할 수 있다.

Method for transmitting control and training symbol in multiple user wireless communication system

본 발명은 다중 사용자 무선 통신 시스템에서 전송 효율 향상을 위한 제어 및 훈련 심볼 전송 방법 및 장치에 대한 것이다. 통신 방법은, 레거시 숏 트레이닝 필드(legacy short training field, L-STF)를 수신하는 단계, 레거시 롱 트레이닝 필드(legacy long training field, L-LTF)를 수신하는 단계, 레거시 시그널 필드(legacy signal field)를 수신하는 단계, 제1 논-레거시 시그널 필드(first non-legacy signal field)를 수신하는 단계, 상기 제1 논-레거시 시그널 필드의 제1 서브필드(subfield)를 이용하여 제2 논-레거시 시그널 필드를 수신하는 단계, 상기 제1 논-레거시 시그널 필드의 상기 제1 서브필드는 상기 제2 논-레거시 시그널 필드의 MCS(modulation and coding scheme)을 지시하며, 논-레거시 롱 트레이닝 필드(non-legacy long training field, L-LTF)를 수신하는 단계, 및 데이터 필드를 수신하는 단계를 포함할 수 있다. The present invention relates to a control and training symbol transmission method and apparatus for improving transmission efficiency in a multi-user wireless communication system. The communication method includes the steps of receiving a legacy short training field (L-STF), receiving a legacy long training field (L-LTF), a legacy signal field Receiving a, receiving a first non-legacy signal field, a second non-legacy signal using a first subfield of the first non-legacy signal field receiving a field, wherein the first subfield of the first non-legacy signal field indicates a modulation and coding scheme (MCS) of the second non-legacy signal field, and a non-legacy long training field (non- It may include receiving a legacy long training field, L-LTF), and receiving a data field.

Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system

본 발명은 직교 주파수 분할 다중화(OFDM) 무선 통신 시스템에서 공간 주파수 블럭 코딩(SFBC)을 구현하는 방법 및 장치에 관한 것이다. 본 발명은 폐루프 모드와 개루프 모드에서 모두 적용가능하다. 폐루프 모드에서, 전력 로딩과 고유 빔 형성은 채널 상태 정보(CSI)에 기초하여 수행된다. 채널 코딩된 데이터 스트림은 둘 이상의 데이터 스트림으로 다중화된다. 전력 로딩은 다중화된 데이터 스트림 각각에 대한 CSI에 기초하여 수행된다. FBC 인코딩은 쌍으로 구성된 서브캐리어 각각에 대한 데이터 스트림에 대하여 수행된다. 그 후, 고유 빔 형성(eigen-beamforming)이 CSI에 기초하여 수행되어 고유 빔을 다수의 송신 안테나에 분배한다. 전력 로딩은 둘 이상의 SFBC 인코딩 블럭 또는 각 고유 모드로 수행될 수 있다. 또한, 전력 로딩은 약한 고유 모드에서 서브캐리어 또는 서브캐리어 그룹에 걸쳐 수행될 수 있다. The present invention relates to a method and apparatus for implementing spatial frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable in both closed and open loop modes. In closed loop mode, power loading and native beamforming are performed based on channel state information (CSI). Channel coded data streams are multiplexed into two or more data streams. Power loading is performed based on the CSI for each of the multiplexed data streams. FBC encoding is performed on the data streams for each of the paired subcarriers. Eigen-beamforming is then performed based on the CSI to distribute the eigenbeam to multiple transmit antennas. Power loading may be performed in two or more SFBC encoding blocks or in each unique mode. In addition, power loading may be performed across subcarriers or groups of subcarriers in a weak native mode.

Method of radio data emission, emitter and receiver using the method

본 발명은 무선통신 영역에 관한 것으로, 더욱 상세하게는 특히, OFDM 기반 전송기술과 관련되어 사용되는 MIMO(Multiple Input Multiple Output) 또는 MISO(Multiple Input Single Output)의 컨텍스트(context)에서 유용한 코딩(coding)과 디코딩(decoding)기술에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication domain, and more particularly, to a wireless communication domain, which is useful in a context of multiple input multiple output (MIMO) or multiple input single output (MISO) ) And a decoding technique. 본 발명은 잘 선택된 2X2 공간 주파수 블럭 코드(SFBC, Space Frequency Block Code)를 각 주파수 페어 k와 k+N/2에 적용하는 공간 주파수 블럭 코드를 제안한다. The present invention proposes a space frequency block code that applies a well-selected 2X2 space frequency block code (SFBC) to each frequency pair k and k + N / 2. 상기 제안된 SFBC는 몇몇 공간 다이버시티를 소개함으로써 좋은 성능을 발휘하면서 각 안테나에 대해 정포락(Constant envelope) 특성을 유지한다. The proposed SFBC maintains a constant envelope characteristic for each antenna while exhibiting good performance by introducing some spatial diversity. 무선통신, 정포락, SFBC, 방사기, 송신기 Wireless communication, Foresight, SFBC, Emitter, Transmitter

Method and apparatus for managing resources in wireless communication system

FIELD: information technology. SUBSTANCE: supergroups can be formed from groups of Physical Hybrid Automatic Repeat Request Channels (PHICH) such that respective PHICH supergroups are multiplexed onto respective non-overlapping resource element subgroups, thereby improving resource usage efficiency for the extended cyclic prefix case and limited number of transmitting antennae. In one example described herein, even-indexed PHICH groups are mapped to a selected subset of resource elements in a group while odd-indexed PHICH groups are mapped to the remaining resource elements in the group. This mapping can be performed by modifying orthogonal sequences associated with the PHICH groups and/or by performing resource mapping using other techniques for respective PHICH supergroups. Upon receiving a transmission of mapped PHICH information, a receiving entity can use knowledge of the mapping to decode transmitted PHICH information using the proper resource subgroup(s). EFFECT: improved resource management in a wireless communication system. 50 cl, 17 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 451 405 (13) C1 (51) МПК H04L 1/16 (2006.01) H04W 48/12 (2009.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010143396/08, 24.03.2009 (24) Дата начала отсчета срока действия патента: 24.03.2009 (73) Патентообладатель(и): КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) R U Приоритет(ы): (30) Конвенционный приоритет: 24.03.2008 US 61/038,875 11.03.2009 US 12/402,349 (72) Автор(ы): МОНТОХО Хуан (US), ЛО Тао (US), ЧЖАН Сяося (US) (45) Опубликовано: 20.05.2012 Бюл. № 14 2 4 5 1 4 0 5 2 4 5 1 4 0 5 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 25.10.2010 C 1 C 1 (56) Список документов, цитированных в отчете о поиске: WO 2006/099577 A1, 21.09.2006. RU 2198474 C2, 10.02.2003. WO 2006/132835 A1, 14.12.2006. NORTEL: «PHICH Mapping for 4-th System», 07.01.2008, найдено в Интернете: Подробнее

Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system

본 발명은 직교 주파수 분할 다중화(OFDM) 무선 통신 시스템에서 공간 주파수 블럭 코딩(SFBC)을 구현하는 방법 및 장치에 관한 것이다. 본 발명은 폐루프 모드와 개루프 모드에서 모두 적용가능하다. 폐루프 모드에서, 전력 로딩과 고유 빔 형성은 채널 상태 정보(CSI)에 기초하여 수행된다. 채널 코딩된 데이터 스트림은 둘 이상의 데이터 스트림으로 다중화된다. 전력 로딩은 다중화된 데이터 스트림 각각에 대한 CSI에 기초하여 수행된다. FBC 인코딩은 쌍으로 구성된 서브캐리어 각각에 대한 데이터 스트림에 대하여 수행된다. 그 후, 고유 빔 형성(eigen-beamforming)이 CSI에 기초하여 수행되어 고유 빔을 다수의 송신 안테나에 분배한다. 전력 로딩은 둘 이상의 SFBC 인코딩 블럭 또는 각 고유 모드로 수행될 수 있다. 또한, 전력 로딩은 약한 고유 모드에서 서브캐리어 또는 서브캐리어 그룹에 걸쳐 수행될 수 있다. The present invention relates to a method and apparatus for implementing spatial frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable in both closed and open loop modes. In closed loop mode, power loading and native beamforming are performed based on channel state information (CSI). Channel coded data streams are multiplexed into two or more data streams. Power loading is performed based on the CSI for each of the multiplexed data streams. FBC encoding is performed on the data streams for each of the paired subcarriers. Eigen-beamforming is then performed based on the CSI to distribute the eigenbeam to multiple transmit antennas. Power loading may be performed in two or more SFBC encoding blocks or in each unique mode. In addition, power loading may be performed across subcarriers or groups of subcarriers in a weak native mode.

Method for transmitting data in multiple antenna system

다중 안테나 시스템의 데이터 전송 방법을 제공한다. 상기 방법은 코드블록을 채널 인코딩하는 단계, 상기 채널 인코딩된 코드블록을 공간 다중화하여 복수의 데이터 스트림을 생성하되, 상기 채널 인코딩된 코드블록은 상기 복수의 데이터 스트림에 균등하게 맵핑되는 단계 및 상기 복수의 데이터 스트림을 다중 안테나를 통해 전송하는 단계를 포함한다. 공간 다중화로 인한 공간 다이버시티 이득을 추가적으로 확보할 수 있다. Provides a data transmission method of a multi-antenna system. The method includes channel encoding code blocks, spatially multiplexing the channel encoded code blocks to generate a plurality of data streams, wherein the channel encoded code blocks are mapped equally to the plurality of data streams and the plurality of data streams. Transmitting the data stream of the multiple antennas. Additional spatial diversity gains due to spatial multiplexing can be obtained.

用于数据传输的方法、装置和系统

本申请提供了一种用于数据传输的方法、装置和系统，能够提高数据传输的可靠性。该方法应用于包含有网络设备和终端设备的通信系统中，网络设备和终端设备预先保存有多个预编码矩阵，该方法包括：终端设备接收用于信道测量的多个参考信号；该终端设备根据该至少一个参考信号和CSI反馈基于的传输方案，发送多个第一指示信息，该多个第一指示信息用于指示x个目标预编码矩阵，该多个第一指示信息中的至少一个第一指示信息用于指示一个目标预编码矩阵，该x个目标预编码矩阵是基于多个预编码矩阵确定，其中，x为需要反馈的目标预编码矩阵的数量，x为大于1的整数。

Insertion before DFT of reference signal for SC-SFBC

본 발명은 무선 통신 시스템을 통해서 송신되는 무선 신호 내에 제 1 및 제 2 참조 신호를 삽입하는 것에 관한 것이고, 무선 신호는 특정한 SC-SFBC 방식에 따라 방사되고, 그 방법은 와 같은 K개의 정수를 구하는 것과, 제 1 및 제 2 참조 신호의 각 쌍 i에 대하여, 제 1 참조 신호의 샘플이 무선 신호 내의, 특정한 SC-SFBC 방식에 의해 처리되는 심볼의 블록 내의 제 1 위치에 의존하는 시간 주기 내에 있도록, 무선 신호 내에 제 1 참조 신호를 삽입하는 것과, 제 2 참조 신호의 샘플이 무선 신호 내의, 심볼의 동일한 블록 내의 제 1 위치에 따라 특정한 위치에 의존하는 시간 주기 내에 있도록, 무선 신호 내에 제 2 참조 신호를 삽입하는 것을 포함한다. The present invention relates to inserting first and second reference signals into a wireless signal transmitted through a wireless communication system, the wireless signal being emitted according to a specific SC-SFBC scheme, the method comprising: to find K integers equal to , and, for each pair i of the first and second reference signals, the first position in the block of symbols where the sample of the first reference signal is processed by a specific SC-SFBC scheme, within the radio signal. inserting the first reference signal in the radio signal so that it is within a time period that depends on , inserting the second reference signal into the radio signal.

Orthogonal frequency division multiplexing (OFDM) method and apparatus for protecting and authenticating wirelessly transmitted digital information

A method and apparatus for protecting and authenticating wirelessly transmitted digital information using numerous techniques. The apparatus may be a wireless orthogonal frequency division multiplexing (OFDM) communication system, a base station, a wireless transmit/receive unit (WTRU), a transmitter, a receiver and/or an integrated circuit (IC). The wireless OFDM communication system includes a transmitter which steganographically embeds digital information in an OFDM communication signal and wirelessly transmits the OFDM communication signal. The system further includes a receiver which receives the OFDM communication signal and extracts the steganographically embedded digital information from the received OFDM communication signal.

Apparatus and method of time space frequency block coding

본 발명은 3 개의 송신 안테나들을 사용하고 데이터 전송 레이트를 2로 갖는 통신시스템의 송신기에서 관한 것으로, 특히 수신기로부터 피드백 받은 채널상태정보에 따라 입력되는 심볼열을 소정 규칙에 의해 복수개의 송신 안테나를 통해 전송하는 방식을 사용하여 코딩 이득을 최대화하는 3 개의 송신 안테나들을 사용하고 데이터 전송 레이트를 2로 갖는 통신시스템의 송신기에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter of a communication system using three transmit antennas and having a data transmission rate of 2. In particular, a symbol string input according to channel state information received from a receiver is transmitted through a plurality of transmit antennas according to a predetermined rule. A transmitter in a communication system using three transmit antennas that maximize coding gain using a transmission scheme and having a data transmission rate of two. 시공간 주파수 블록 부호화, 다이버시티 이득, 데이터 레이트, 채널 궤환 Space-Time Frequency Block Coding, Diversity Gain, Data Rate, Channel Feedback

一种用于下行发送分集的数据处理方法及基站

本发明提供了一种用于下行发送分集的数据处理方法及基站，其中该方法包括：得到由第一类型数据符号和第二类型数据符号间隔排列形成的数据符号组，所述第一类型的数据符号的重要性较高；确定与所述当前时隙对应的第一天线端口配对方式；对于包含参考信号的正交频分复用OFDM符号，在当前时隙，按照第一天线端口配对方式对数据符号组对应的发射分集矩阵中的符号执行天线端口和子载波映射处理，其中，与第一类型数据符号相关的数据符号所在的子载波距离所述同一天线端口的参考信号所在的子载波较近；对映射到子载波上的符号执行反快速傅立叶变换和循环前缀插入处理之后，映射到物理天线后发送。本发明能够使得较重要的符号得到更好的保护。

Spatio-temporal frequency block coding apparatus and method for improving performance

method for transmitting signals using space time code

본 발명은 시공간 부호에 관한 것으로, 보다 구체적으로 다양한 채널 부호화 방법을 포함한 채널 환경의 변화를 고려한 시공간 부호에 관한 것이다. 본 발명은 상술한 목적을 달성하기 위해, 시공간 부호를 이용하여 신호를 송신하는 방법에 있어서, 공간 다중화(Spatial Multiplexing) 방식의 선형 변환 행렬의 일부 열(column) 및 GOD(Generalized Optimal Diversity) 부호의 선형 변환 행렬의 일부 열(column)을 이용하여 제1 행렬을 구성하는 단계; 상기 구성된 제1 행렬에 제1 유니터리 행렬(unitary matrix)을 곱하여 선형 변환 행렬을 생성하는 단계; 및 상기 생성된 선형 변환 행렬을 이용하여 상기 신호를 송신하는 단계를 포함한다. STC, 채널 부호, SM, GOD, 유니터리 행렬 The present invention relates to a space-time code, and more particularly, to a space-time code in consideration of changes in channel environment including various channel coding methods. In order to achieve the above object, the present invention provides a method for transmitting a signal using a space-time code, the method comprising a partial column and a Generalized Optimal Diversity (GOD) code of a linear transformation matrix of a spatial multiplexing scheme. Constructing a first matrix using some columns of the linear transformation matrix; Generating a linear transformation matrix by multiplying the constructed first matrix by a first unitary matrix; And transmitting the signal using the generated linear transformation matrix. STC, Channel Sign, SM, GOD, Unitary Matrix