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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 34850. Отображено 100.

05-01-2012 дата публикации

Splitterless multicarrier modem

Номер: US20120002709A1

Автор: David M. Krinsky, John A. Greszczuk, Marcos Tzannes, Michael A. Tzannes, Richard W. Gross

Принадлежит: Daphimo Co BV LLC

A modem for use in Digital Subscriber Line communications transmits and receives data over the local subscriber loop in common with voice information over the loop, while avoiding the need for voice/data splitters. The modem responds to disruptions associated with “disturbance events” such as on-hook to off-hook transitions and the like by rapidly switching between pre-stored channel parameter control sets defining communications over the loop under varying conditions. In addition to changing parameter control sets responsive to a disturbance event, the modem may also change transmission power levels and other system parameters such as frequency domain equalizer characteristics. Further, provisions are made for reduced bandwidth communications under selected conditions.

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Номер записи: 1

05-01-2012 дата публикации

Modulation of Signal Field in a WLAN Frame Header

Номер: US20120002756A1

Автор: Hongyuan Zhang, Sudhir Srinivasa

Принадлежит: MARVELL WORLD TRADE LTD

A plurality of training fields of a preamble of a physical layer data unit are generated, and training fields of the plurality of training fields are mapped to respective signal streams of a plurality of streams using a mapping matrix. A signal field of the preamble of the data unit is generated, and the signal field is mapped to the plurality of signal streams using a column of the mapping matrix. The plurality of signal streams are mapped to a plurality of spatial streams, and at least i) the plurality of training fields and ii) the signal field are transmitted via the plurality of spatial streams.

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Номер записи: 2

05-01-2012 дата публикации

Terminal device and base station device

Номер: US20120004002A1

Автор: Masahiko Nanri, Takayuki Kawamura, Tsutomu Onuki

Принадлежит: Panasonic Corp

A terminal device free of interference between an RACH and a PUSCH or the like even when a base station device with a large coverage is installed. In the device, a configuration number extraction unit ( 103 ) extracts a configuration number from a BCH received by a BCH reception unit ( 102 ). A control unit ( 104 ) determines the corresponding RACH format (the necessity of repetition, the CP length TCP, the second preamble length TPRE2, and the GT length TGT) according to the configuration number, notifies a repetition unit ( 109 ) of the result of the judgment of necessity of repetition, notifies the repetition unit ( 109 ) of the second preamble length TPRE2, notifies a CP addition unit ( 110 ) of the CP length TCP, and notifies a GT addition unit ( 112 ) of the GT length TGT. When the repetition unit ( 109 ) receives the notification of performing the repetition, it performs the repetition according to the second preamble length received from a TPRE2 determination section ( 154 ). The CP addition unit ( 110 ) produces a CP according to the CP length received from a TCP determination section ( 155 ).

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Номер записи: 3

12-01-2012 дата публикации

Method and apparatus for providing a location based service

Номер: US20120009941A1

Автор: Hai Wang, LEI Zhou, Xufeng Zheng

Принадлежит: SAMSUNG ELECTRONICS CO LTD

An application method of a Location Based Service-zone (LBS-zone) is capable of implementing instruction and measurement for the LBS-zone. The method includes sending, by a serving Base Station (BS) located by a Mobile Station (MS), an instruction message indicating an LBS-zone exists, to the MS. The method also includes, when the LBS-zone exists, and the MS measures a reference signal sent by a neighbor BS in the LBS-zone, receiving, by the MS, the reference signal in the LBS-zone, which is sent by the neighbor BS and used for locating the MS, according to the instruction message. The method also includes measuring, by the MS, the reference signal, and sending a measurement result to the serving BS. Using embodiments of the invention, the MS may be enabled to obtain information of the LBS-zone accurately, so as to implement normal measurement for the LBS-zone and measurement result feedback.

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Номер записи: 4

19-01-2012 дата публикации

Method and apparatus for transmitting reference signal in multi-antenna system

Номер: US20120014477A1

Автор: Bin Chul Ihm, Hyun Soo Ko, Ja Ho KOO, Jae Hoon Chung, Moon II Lee, Seung Hee Han

Принадлежит: LG ELECTRONICS INC

A method for transmitting a reference signal in a multi-antenna system is provided. The method includes: selecting at least one orthogonal frequency division multiplexing (OFDM) symbol in a subframe containing a plurality of OFDM symbols; allocating a channel quality indication reference signal (CQI RS) capable of measuring a channel state for each of a plurality of antennas to the selected at least one OFDM symbol; and transmitting the CQI RS, wherein the CQI RS is allocated to an OFDM symbol which does not overlap with an OFDM symbol to which a common reference signal to be transmitted to all user equipments in a cell or a dedicated reference signal to be transmitted to a specific user equipment in the cell is allocated.

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Номер записи: 5

02-02-2012 дата публикации

Method of communication using frame

Номер: US20120026920A1

Автор: Dong Cheol Kim, Hyun Woo Lee, Jin Sam Kwak, Minseok Noh, Seung Hee Han, Sungho Moon, Yeong Hyeon Kwon

Принадлежит: Individual

A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.

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Номер записи: 6

02-02-2012 дата публикации

Wireless communication system, base station, server, wireless communication method, and program

Номер: US20120026962A1

Автор: Kenji Koyanagi, Takamichi Inoue, Yoshikazu Kakura

Принадлежит: NEC Corp

Provided is a wireless communication technique capable of supporting communication using a single component carrier, and communication using a plurality of component carriers. The communication using the plurality of carriers comprises a processing means for performing the signal processing in accordance with each of the carriers with respect to the common signal sequence used by the plurality of carriers. The present invention makes it possible to cope with the communication employing a single component carrier and the wireless communication employing a plurality of the component carriers. Further, PAPR of the reference signals can be made small because there is no possibility that the identical CAZAC sequence is used among the component carriers when a plurality of the component carriers are employed.

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Номер записи: 7

02-02-2012 дата публикации

Mixed mode modulation for OFDM

Номер: US20120027119A1

Автор: Edwin H.S. Shearer

Принадлежит: Individual

In a wireless OFDM communication system such as a neighborhood area network, one or more of the following features may be used to increase throughput while accommodating worst-case channel conditions. Firstly, the cyclic prefix may be chosen to be greater than or equal to the longest delay profile that could reasonably be expected so that either demodulation method can be accommodated. Secondly, the number of pilots may be chosen to be less than that required by the worst case channel so that the data rate is maximized for a large portion of the channels in use. Thirdly, the data packet may be constructed such that the demodulation mode employed for data payload encoding is signaled in the first portion of the data packet often referred to as the PHY Header. The PHY Header is always transmitted as a coherent modulation including data and pilot tones.

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Номер записи: 8

02-02-2012 дата публикации

Method for transmitting and receiving data in wireless communication system

Номер: US20120027123A1

Автор: Bin Chul Ihm, Han Gyu Cho, Jin Sam Kwak, Min Seok Noh, Sung Ho Moon, Wook Bong Lee

Принадлежит: LG ELECTRONICS INC

The present invention relates to a method for transmitting and receiving data in a wireless communication system. The method for transmitting data in a wireless communication system, according to one aspect of the present invention, comprises a step in which a base station transmits downlink data to a first terminal which supports a first system via a first region of a frame, and transmits downlink data to a second terminal which supports a second system via a second region which follows the first region corresponding to a frame offset on a time axis, wherein said frame offset is an offset of the start point of the frame for said first system and the start point of the frame for said second system, and said first region includes 3+6 (said frame offset-1) OFDM symbols.

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Номер записи: 9

16-02-2012 дата публикации

Feedback bundling for power-limited devices in wireless communications

Номер: US20120039227A1

Автор: Jelena M. Damnjanovic, Juan Montojo, Wanshi Chen

Принадлежит: Qualcomm Inc

Methods, systems, and devices are described for bundling feedback related to downlink transmissions on a plurality of component carriers (CCs). In some examples, a base station configures a multi-carrier mobile device to use different feedback bundling schemes when it determines that the mobile device is power limited. The bundling scheme configured for the mobile device may be based, in part, on one or more transmission modes of the downlink CCs. Bundling schemes may include combinations of bundling techniques and an order in which these techniques are applied. In particular, the bundling techniques may include CC bundling in combination with spatial bundling and/or feedback repetition. For efficiency and performance, a bundling scheme may require application of CC bundling before resorting to use of feedback repetition.

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Номер записи: 10

23-02-2012 дата публикации

Method and apparatus for transmitting a frame in a wireless ran system

Номер: US20120044925A1

Автор: Bong Hoe Kim, Byeong Woo Kang, Dae Won Lee, Yong Ho Seok, Yu Jin Noh

Принадлежит: LG ELECTRONICS INC

There is provided a method and apparatus for transmitting a frame which is performed by a transmission STA in a WLAN system. The method of transmitting a frame according to the present invention includes generating an MAC Protocol Data Unit (MPDU) to be transmitted to a target station, generating a PLCP Protocol Data Unit (PPDU) by attaching a Physical Layer Convergence Procedure (PLCP) header to the MPDU, and transmitting the PPDU to the target station. The PLCP header comprises a partial Association ID (AID) of the target station.

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Номер записи: 11

01-03-2012 дата публикации

Apparatus for Transmitting and Receiving Data to Provide High-Speed Data Communication and Method Thereof

Номер: US20120051474A1

Автор: Deuk-Su Lyu, Eun-Young Choi, Hee-Jung Yu, Myung-Soon Kim, Sok-Kyu Lee, Taehyun Jeon

Принадлежит: Electronics and Telecommunications Research Institute ETRI

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

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Номер записи: 12

08-03-2012 дата публикации

MIMO OFDM System

Номер: US20120057661A1

Автор: Jack Harriman Winters, Nelson Ray Sollenberger, Ye Li

Принадлежит: AT&T Corp

A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.

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Номер записи: 13

15-03-2012 дата публикации

Method for conducting communication using a frame structure which supports two or more wireless communication schemes

Номер: US20120063374A1

Автор: Dong Guk Lim, Han Gyu Cho, Jin Sam Kwak, Sung Ho Moon, Yeong Hyeon Kwon

Принадлежит: LG ELECTRONICS INC

Disclosed is a method for conducting communication using a frame structure which supports two or more wireless communication schemes, and an apparatus using the method. A method for constructing an FDD frame according to the present invention efficiently supports a legacy system and an enhanced system using an H-FDD frame structure. Further, the method for constructing an FDD frame according to the present invention efficiently supports a terminal and an H-FDD terminal, which use different communication systems.

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Номер записи: 14

22-03-2012 дата публикации

Systems and methods for high rate ofdm communications using first and second cyclic prefix lengths

Номер: US20120069877A1

Автор: Colin Lanzl, Dongjun Lee, Marcos C. Tzannes, Todor Cooklev

Принадлежит: Aware Inc

Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver. Likewise, when the receiver receives packets from that particular transmitter, the receiver can utilize the stored communication parameters for reception.

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Номер записи: 15

05-04-2012 дата публикации

Determining a communication channel from a plurality of possible channel bandwidths

Номер: US20120082147A1

Автор: Hongyuan Zhang, Raja Banerjea, Yong Liu

Принадлежит: MARVELL WORLD TRADE LTD

In a method of determining an available channel bandwidth in a communication system, wherein the communication system utilizes i) a set of component channels for transmitting data streams and ii) a set of access control channels, and wherein each of at least some of the access control channels partially overlaps, in frequency, at least one of the component channels, whether a primary channel of the access control channels is idle is determined. The primary channel partially overlaps, in frequency, at least a first one of the component channels. That a composite channel includes one or more of the component channels is determined based at least on a determination of whether the primary channel is idle. A signal is caused to be transmitted via the composite channel after determining that the composite channel includes one or more of the component channels.

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Номер записи: 16

26-04-2012 дата публикации

Cell selecting apparatus and cell selecting method

Номер: US20120099522A1

Автор: Yoshihiro Kawasaki

Принадлежит: Fujitsu Ltd

A cell selection apparatus is used in the environment in which multiple communication systems coexists and at least one of the communication systems use guard intervals inserted in the transmission signal. The apparatus includes delay profile creation means ( 722 ) for creating a delay profile from a received radio signal and detecting amplitudes and timing of multipath arriving waves; comparison means ( 728 ) for comparing at least one delay quantity of the multipath arriving waves with a guard interval of a signal used in at least one of said multiple communication systems; and determination means ( 730 ) for determining a cell provided by one of the communication systems to which a mobile terminal is to be connected based on the comparison result.

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Номер записи: 17

03-05-2012 дата публикации

Methods and systems for enabling feedback in wireless communication networks

Номер: US20120106483A1

Автор: Hang Zhang, Jianglei Ma, Mo-Han Fong, Peiying Zhu, Wen Tong

Принадлежит: ROCKSTAR BIDCO LP

Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

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Номер записи: 18

17-05-2012 дата публикации

Apparatus and Method for Selecting a User From a Group of Users Sharing a Channel

Номер: US20120120894A1

Автор: Hans HÖHNE

Принадлежит: Individual

An apparatus and a method for protecting persistent MAP allocation may be described. The protecting mechanism may use HARQ information or UL data as an implicit MAP ACK.

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Номер записи: 19

17-05-2012 дата публикации

Packet processing systems and methods

Номер: US20120120935A1

Автор: Mark A. Webster, Michael J. Seals

Принадлежит: Individual

Various packet processing systems and methods are disclosed. One method embodiment, among others, comprises providing a legacy long training symbol (LTS), and inserting subcarriers in the legacy LTS to form an extended LTS (ELTS).

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Номер записи: 20

17-05-2012 дата публикации

Method and apparatus for transmitting/receiving a control format indicator channel for a relay backhaul link in a wireless communication system

Номер: US20120121028A1

Автор: Gyu Jin Park, Han Gyu Cho, Jae Hoon Chung, So Yeon Kim, Sung Ho Moon, Yeong Hyeon Kwon

Принадлежит: LG ELECTRONICS INC

The present invention relates to a method and an apparatus for transmitting/receiving a control format indicator channel for a relay backhaul link in a wireless communication system. According to one aspect of the present invention, a method for transmitting a control format indicator channel for a relay backhaul link in a wireless communication system is configured such that a base station generates a relay physical control format indicator channel (hereinafter, referred to as “R-PCFICH”) containing information on a relay physical downlink control channel (hereinafter, referred to as “R-PDCCH”) region, and transmits the R-PCFICH through a first OFDM symbol of the R-PDCCH region.

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Номер записи: 21

17-05-2012 дата публикации

Apparatus for Transmitting and Receiving Data to Provide High-Speed Data Communication and Method Thereof

Номер: US20120121040A1

Автор: Deuk-Su Lyu, Eun-Young Choi, Hee-Jung Yu, Myung-Soon Kim, Sok-Kyu Lee, Taehyun Jeon

Принадлежит: Electronics and Telecommunications Research Institute ETRI

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

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Номер записи: 22

31-05-2012 дата публикации

Establishing additional reverse link carriers in multi-carrier wireless systems

Номер: US20120134330A1

Автор: Li-Hsiang Sun, Suk Woo Lee, Young C. Yoon

Принадлежит: LG ELECTRONICS INC

A method and apparatus for reliably and quickly establishing multiple reverse links in multi-carrier wireless networks is provided. Signaling channels are established the on an existing forward link in order to transmit reverse link power control bits and the acknowledgment indications.

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Номер записи: 23

31-05-2012 дата публикации

Apparatus and method for estimating channel in digital video broadcasting system

Номер: US20120134440A1

Автор: Alain Mourad, Hong-Sil Jeong, Ismael Gutierrez, Sung-Ryul Yun

Принадлежит: SAMSUNG ELECTRONICS CO LTD

A method of operation of a transmitting node in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes generating a frame including a plurality of physical layer zones, each of the plurality of physical layer zones applying different Fast Fourier Transform (FFT) sizes and different pilot patterns; and transmitting the frame.

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Номер записи: 24

07-06-2012 дата публикации

Radio communication apparatus and radio communication method

Номер: US20120140687A1

Автор: Daichi Imamura, Seigo Nakao

Принадлежит: Panasonic Corp

Provided is a radio communication device which can make Acknowledgement (ACK) reception quality and Negative Acknowledgement (NACK) reception quality to be equal to each other. The device includes: a scrambling unit ( 214 ) which multiplies a response signal after modulated, by a scrambling code “1” or “e −j(π/2) ” so as to rotate a constellation for each of response signals on a cyclic shift axis; a spread unit ( 215 ) which performs a primary spread of the response signal by using a Zero Auto Correlation (ZAC) sequence set by a control unit ( 209 ); and a spread unit ( 218 ) which performs a secondary spread of the response signal after subjected to the primary spread, by using a block-wise spread code sequence set by the control unit ( 209 ).

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Номер записи: 25

07-06-2012 дата публикации

Method and apparatus for antenna diversity in multi-input multi-output communication systems

Номер: US20120140798A1

Автор: Aamod Khandekar, Alexei Gorokhov, Dhananjay Ashok Gore, Tamer Kadous

Принадлежит: Qualcomm Inc

Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M≧1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V≧M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T≧V. Transmission symbols are generated for the mapped symbols, e.g., based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.

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Номер записи: 26

07-06-2012 дата публикации

Radio communication apparatus and radio communication method

Номер: US20120142275A1

Автор: Akihiko Nishio

Принадлежит: Panasonic Corp

A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate characteristics. In this device, an FFT unit subjects a modulated signal inputted from a modulation unit to a Fourier transformation. A pilot insertion unit inserts a pilot symbol into a plurality of individual frequency components of the modulated signal. Weight multiplication units multiply the individual frequency components and the pilot symbols inserted into the individual frequency components, by weight coefficients set at a weight coefficient setting unit. IFFT units subject the frequency components to an inverse Fourier transformation, thereby to convert the frequency components into time domains.

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Номер записи: 27

21-06-2012 дата публикации

Estimating frequency-offsets and multi-antenna channels in mimo ofdm systems

Номер: US20120155512A1

Автор: Georgios B. Giannakis, Xiaoli Ma

Принадлежит: University of Minnesota

Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequency-selective fading channels. A wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols. The transmitter applies a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, and a modulator outputs a wireless signal in accordance with the blocks of symbols. A receiver receives the wireless signal and estimates the CFO, and outputs a stream of estimated symbols based on the estimated CFO.

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Номер записи: 28

28-06-2012 дата публикации

Sequence generating method for efficient detection and method for transmitting and receiving signals using the same

Номер: US20120163348A1

Автор: Dong Cheol Kim, Hyun Woo Lee, Jin Sam Kwak, Min Seok Noh, Seung Hee Han, Yeong Hyeon Kwon

Принадлежит: LG ELECTRONICS INC

A sequence generation method for allowing a reception end to effectively detect a sequence used for a specific channel of an OFDM communication system, and a signal transmission/reception method using the same are disclosed. During the sequence generation, an index is selected from among the index set having the conjugate symmetry property between indexes, and a specific part corresponding to the frequency “0” is omitted from a transmitted signal. In addition, a reception end can calculate a cross-correlation value between a received (Rx) signal and each sequence using only one cross-correlation calculation based on the conjugate symmetry property.

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Номер записи: 29

19-07-2012 дата публикации

Feedback scheme for providing feedback on plural transmissions

Номер: US20120182914A1

Автор: Alexander Golitschek Edler Von Elbwart, Christian Wengerter, Joachim Löhr, Priya Hariharan, Seigo Nakao

Принадлежит: Panasonic Corp

The invention relates to methods and apparatuses for providing HARQ feedback in a mobile communication system using carrier aggregation. To suggest a scheme for transmitting feedback on the successful/unsuccessful decoding of transmissions that is operable in FDD mode, the invention proposes to utilize only a single one of plural radio resources available for feedback transmission for signaling feedback for multiple transmissions. A feedback sequence of ACK/NACKs for the transmissions is mapped to one feedback resource combination that is one of the radio resources available for feedback transmission and a modulation symbol of the given modulation scheme that is transmitted on said one radio resource. This scheme can also be used in cases where the number of possible feedback sequences of ACK/NACKs for the transmissions is larger than the number of feedback resource combinations available for feedback transmission.

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Номер записи: 30

19-07-2012 дата публикации

System and Method for Mapping Reference Signal Sequence in Advanced Long Term Evolution System

Номер: US20120182974A1

Автор: Bo Dai, Guanghui Yu, Xin Wu, Zhisong Zuo

Принадлежит: ZTE Corp

The present invention provides a method and system for mapping a reference signal sequence in an advanced Long Term Evolution (LTE) system, and the method and the system are used to map the reference signal sequence to an orthogonal frequency division multiplexing symbol of l. The method includes: when the system uses a normal cyclic prefix, determining the symbol l according to an expression, and mapping the reference signal sequence to a location of a sub-carrier k on the symbol l of an antenna port p. The system includes: a mapping module, a first acquiring module and a second acquiring module. The system and the method which are provided ensure the transmission performance while ensuring the interference randomization. In addition, the system and the method are compatible with existing LTE systems, thus realizing high-order Multiple Input Multiple Output (MIMO) transmission, supporting the usage of the corresponding techniques.

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Номер записи: 31

19-07-2012 дата публикации

Communication method, and transmitting apparatus and receiving apparatus using that communication method

Номер: US20120182985A1

Автор: Akihiko Matsuoka, Masayuki Orihashi, Yoichi Nakagawa, Yutaka Murakami

Принадлежит: Panasonic Corp

A transmission apparatus includes a plurality of antennas and a frame configurator that selects, in a first unit time either a first transmitting method which transmits a modulated signal from at least one of the plurality of antennas, or a second transmitting method which transmits a plurality of modulated signals from the plurality of antennas, for a first carrier group arranged for a first terminal and either the first transmitting method or the second transmitting method for a second carrier group arranged for a second terminal. The frame configurator selects, in a second unit time either the first transmitting method or the second transmitting method for the first carrier group arranged for a third terminal and either the first transmitting method or the second transmitting method for the second carrier group arranged for a fourth terminal, wherein each of carrier groups includes one or more sub-carriers.

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Номер записи: 32

02-08-2012 дата публикации

Power line communication apparatus and noise detection method thereof

Номер: US20120195384A1

Автор: Takahiro Sato

Принадлежит: Renesas Electronics Corp

A power line communication apparatus and a noise detection method that are capable of detecting noises periodically generated without extending the dynamic range of an A/D converter used therein. The power line communication apparatus according to an embodiment of the present invention includes: a power detection unit that detects powers in communication slots used for transmitting and receiving data via a power line; a channel (transmission line) estimation unit that estimates the condition of a transmission channel on the basis of a difference between an average power through unused slots that are not assigned for transmitting and receiving the data among the communication slots and instantaneous powers regarding the unused slots; and a periodicity determination unit that detects a noise that is periodically generated on the basis of the estimated condition of the transmission channel and an alternating-current cycle in the power line.

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Номер записи: 33

02-08-2012 дата публикации

Physical Layer Frame Format for Long Range WLAN

Номер: US20120195391A1

Автор: Hongyuan Zhang, Raja Banerjea, Rohit U. Nabar, Yong Liu

Принадлежит: MARVELL WORLD TRADE LTD

In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first preamble portion and a data portion of the data unit is generated. The first preamble portion includes one or more long training fields. The first preamble portion and the data portion are modulated using a plurality of orthogonal frequency division multiplexing (OFDM) symbols. Symbol duration of each OFDM symbol is at least 8 μs. The data unit is generated to include the plurality of OFDM symbols.

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Номер записи: 34

09-08-2012 дата публикации

Methods of uplink channelization in lte

Номер: US20120201120A1

Автор: Jianzhong Zhang, Joonyoung Cho

Принадлежит: Individual

Methods of a slot-level remapping physical uplink control channels into two resource blocks respectively located at two slots of a subframe, are generally adapted to a 3 GPP LTE physical uplink where ACK/NAK resource blocks may be applied by the extended cyclic prefix, adapted to a complex 3GPP LTE physical uplink where mixed resource blocks (where the ACK/NAK and CQI channels coexist) may be applied by the normal cyclic prefix, and adapted to a complex 3GPP LTE physical uplink where mixed resource blocks (where the ACK/NAK and CQI channels coexist) may be applied by the extended cyclic prefix.

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Номер записи: 35

16-08-2012 дата публикации

Method for generating and transmitting frame in a wireless local area network and apparatus for supporting the same

Номер: US20120207140A1

Автор: Heejung Yu, Hun Sik Kang, Il Gu LEE, Min Ho CHEONG, Sok Kyu Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

A channel sounding method in a wireless local area network (WLAN) system is provided. The method, performed by a transmitter, includes transmitting a null data packet announcement (NDPA) frame to a receiver to initiate a channel sounding procedure; transmitting a null data packet (NDP) to the receiver and receiving a feedback frame. The feedback frame includes a plurality of segment frames and a channel feedback report. The channel feedback report is split into a plurality of feedback segments. Each of the plurality of feedback segments is respectively included in each of the plurality of segment frames. The each of the plurality of segment frames includes a first-segment subfield indicating whether the each of the plurality of feedback segment included is a first segment and a remaining-segment subfield indicating the number of remaining feedback segments.

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Номер записи: 36

16-08-2012 дата публикации

Multi-clock phy preamble design and detection

Номер: US20120207232A1

Автор: Hongyuan Zhang, Raja Banerjea

Принадлежит: Marvell International Ltd

In a method for detecting a clock rate of a data unit, the data unit is received via a communication channel. The data unit includes i) a first preamble portion and ii) an orthogonal frequency division multiplexing (OFDM) portion following the first preamble portion. The OFDM portion includes a second preamble portion including one or more long training fields. Based on the first preamble portion, whether a clock rate of the OFDM portion is a first clock rate or a second clock rate lower than the first clock rate is determined based on the first preamble portion.

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Номер записи: 37

16-08-2012 дата публикации

Signaling to application lack of requested bandwidth

Номер: US20120207233A1

Автор: Amer A. Hassan, Christian Huitema, D. Gabriel Frost, Deyun Wu, Thomas W. Kuehnel

Принадлежит: Microsoft Corp

A system for signaling an application when a requested data rate and Quality of Service cannot be achieved using OFDM wireless data transmission, and the application proceeds by either renegotiating QoS and data rate, or waiting until they requested rate and QoS are met.

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Номер записи: 38

23-08-2012 дата публикации

Repetitive transmissions in multi-carrier based wireless access techniques

Номер: US20120216092A1

Автор: Jae-Won Chang, Jin-Hyuk Jung, Jin-Young Chun, Moon-Il Lee

Принадлежит: LG ELECTRONICS INC

According to one embodiment, a method for repetitive transmission using a plurality of sub-carriers includes: preparing a symbol to be transmitted using the plurality of sub-carriers within a single time domain unit; repeating the symbol a predetermined number (N) of times; applying a corresponding one of N different cyclic shift values to each of the N repeated symbols to be transmitted using the plurality of sub-carriers within the single time domain unit; performing an IFFT (Inverse Fast Fourier Transform) on each of the N repeated symbols to which the corresponding one of the N different cyclic shift values is applied; and transmitting the N repeated symbols on which the IFFT is performed using the plurality of sub-carriers.

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Номер записи: 39

30-08-2012 дата публикации

Receiving device, receiving method, communication system, and communication method

Номер: US20120219079A1

Автор: Ryota Yamada, Takashi Yoshimoto

Принадлежит: Individual

Provided is a receiving device including: a receiving unit that receives a multicarrier modulation signal; an interference cancelling unit that removes a modulation symbol replica generated using a decoding process result, from the signal received by the receiving unit, and outputs the resultant signal; and a signal detecting unit that decodes the signal outputted by the interference cancelling unit, and outputs the decoding process result. The interference cancelling unit generates the modulation symbol replica with the use of the decoding process result of part of data modulation symbols constituting the signal received by the receiving unit.

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Номер записи: 40

06-09-2012 дата публикации

Systems and methods for handling crosstalk vectoring failures in multi-card vectoring groups

Номер: US20120224674A1

Автор: Arlynn Wayne Wilson, Fred Chu, Richard Goodson

Принадлежит: Individual

A communication system comprises a plurality of line cards having transceivers coupled to a plurality of subscriber lines. Each line card has at least one active transceiver within the same vectoring group, and each line card also has vector logic capable of cancelling crosstalk induced by an active transceiver that is a member of the vectoring group. In the event of a vectoring fault that prevents a line card from receiving vectoring information from at least on other line card, the vector logic is configured to disable vectoring for the interferers affected by the error in order to prevent vectoring operations based on obsolete vectoring coefficients from adversely affecting the quality of the communicated signals. The transceivers communicating signals affected by the suspended vectoring operations are also configured to adjust their constellation density profiles, thereby reducing their data rates, to accommodate the increased noise level resulting from the loss of vectoring. By handling the vectoring fault in such manner, communication can continue without requiring a retrain.

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Номер записи: 41

06-09-2012 дата публикации

Systems and methods selectively excluding tones from vectoring

Номер: US20120224683A1

Автор: Arlynn Wayne Wilson, Fred Chu, Richard Goodson

Принадлежит: Individual

A discrete multi-tone (DMT) transceiver communicates tones across a subscriber line. Vectoring is employed in an effort to reduce the effects of crosstalk. However, for some tones, such as tones significantly affected by radio frequency interference (RFI) or other forms of alien noise, vectoring may actually introduce distortions such that the vectoring degrades rather than improves overall signal quality. Control logic of the DMT transceiver is configured to sense when tones are affected by significant levels of alien noise and to exclude such tones from vectoring, thereby improving signal quality for such tones. The control logic also may lower the constellation densities of such tones in order to accommodate the vectoring exclusions applied to such tones.

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Номер записи: 42

20-09-2012 дата публикации

Transmission station, receiving station, wireless communication system, and wireless communication method

Номер: US20120236832A1

Автор: Daisuke Ogawa

Принадлежит: Fujitsu Ltd

A transmission station includes a communication section configured to perform transmission and reception of data with a receiving station by using a plurality of wireless carriers whose frequency bands differ from one another, and a processor configured to obtain reception qualities of a plurality of wireless carriers which are reported from the receiving station, and configured to assign a gap for each of the wireless carriers, in accordance with the obtained reception quality of the each of the wireless carriers, the gap being a period over which transmission of the data is stopped.

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Номер записи: 43

20-09-2012 дата публикации

Quadrature communications device with power combiner and related methods

Номер: US20120236965A1

Автор: Khurram Muhammad

Принадлежит: Research in Motion Ltd

A communications device may include In-phase (I) power amplifiers configured to generate I amplified signals, Quadrature (Q) power amplifiers configured to generate Q amplified signals, an I controller coupled to the I power amplifiers and configured to selectively enable some of the I power amplifiers, and a Q controller coupled to the Q power amplifiers and configured to selectively enable some of the Q power amplifiers. The communications device may also include a power combiner configured to combine the I amplified signals and the Q amplified signals in a combined amplified signal, and an antenna coupled to the power combiner.

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Номер записи: 44

27-09-2012 дата публикации

Use of semiconductor optical amplifiers-based intensity modulator in signal transmission

Номер: US20120243876A1

Автор: Jianming Tang

Принадлежит: Bangor University

The present invention discloses the use of a semiconductor optical amplifier in a transceiver in order to increase the number of end users without reducing the bandwidth allocated to each user.

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Номер записи: 45

04-10-2012 дата публикации

Spatial spreading in a multi-antenna communication system

Номер: US20120250788A1

Автор: Jay Rodney Walton, John W. Ketchum, Lizhong Zheng, Mark S. Wallace, Steven J. Howard

Принадлежит: Qualcomm Inc

Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain N D data symbol blocks to be transmitted in N M transmission spans, where N D ≧1 and N M >1. The N D blocks are partitioned into N M data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via N T transmit antennas in one transmission span. The N D data symbol blocks are thus spatially processed with N M steering matrices and observe an ensemble of channels.

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Номер записи: 46

04-10-2012 дата публикации

Schemes for detecting guard intervals in ofdm system

Номер: US20120250807A1

Автор: S. Harish Krishnan, Shrinivas Bhat

Принадлежит: Saankhya Labs Pvt Ltd

A receiver and method of detecting a guard interval estimate accurately by performing an Nth order polynomial based non-linear quantization on a pre-estimated guard interval in a received Orthogonal Frequency Division Multiplexing (OFDM) signal in a receiver is provided. The pre-estimated guard interval is obtained by performing normalized auto-correlation on the received OFDM signal. The method includes (i) performing a rounding operation on (a) one or more m th coefficient of the polynomial and (b) the pre-estimated guard interval to obtain an indexing parameter ‘k’, and detecting the guard interval estimate based on (i) a value of k, and (ii) a guard interval from one or more guard intervals that are stored in a look up table. The guard interval estimate is detected in accordance with an equation: {tilde over (L)}=L[k−4], where ‘L’ is the guard interval stored in the look up table that corresponds to the value of k.

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Номер записи: 47

11-10-2012 дата публикации

Transmission and reception apparatus and method

Номер: US20120257688A1

Автор: Akihiko Matsuoka, Masayuki Orihashi, Yutaka Murakami

Принадлежит: Panasonic Corp

A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

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Номер записи: 48

18-10-2012 дата публикации

Header encoding/decoding

Номер: US20120266042A1

Автор: Ba-Zhong Shen, Trachewsky Jason A

Принадлежит: Broadcom Corp

In a communication device that is operative to perform decoding, a log-likelihood ratio (LLR) circuitry operates to calculate LLRs corresponding to every bit location within a received bit sequence. This received bit sequence may include a header and a data portion (both of which may be included within a frame that also includes a preamble). The header is composed of information bits, a duplicate of those information bits (such as may be generated in accordance with repetition encoding), and redundancy bits. The header includes information corresponding to frame or data including frame length, a code type by which the data are encoded, a code rate by which the data are encoded, and a modulation by which symbols of the data are modulated. Once the header has been decoded, then the data corresponding thereto is decoded by a block decoder circuitry to make estimates of that data.

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Номер записи: 49

15-11-2012 дата публикации

Techniques for signaling reference signal parameters in a wireless communication system

Номер: US20120287872A1

Автор: James W. McCoy

Принадлежит: Individual

A technique for operating a wireless communication device includes assigning a reference signal bandwidth to a reference signal. Cyclic shift control bits (associated with the reference signal) are then allocated based on the assigned reference signal bandwidth. The allocated cyclic shift control bits specify a cyclic shift associated with the reference signal.

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Номер записи: 50

22-11-2012 дата публикации

Preamble configuring method in the wireless lan system, and a method for a frame synchronization

Номер: US20120294296A1

Автор: Sok-Kyu Lee, Woo-Yong Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz a wireless local area network system, the method comprising arranging a short preamble having a plurality of repetitive S symbols, and an IS symbol, and arranging a long preamble having a long cyclic prefix (CP) and a plurality of L symbols for frame synchronization and symbol timing by performing auto-correlation according to the length of window of the auto-correlation.

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Номер записи: 51

22-11-2012 дата публикации

Short guard interval with green field preamble

Номер: US20120294392A1

Автор: Hongyuan Zhang

Принадлежит: MARVELL WORLD TRADE LTD

Systems, methods, and other embodiments associated with a single stream wireless communication with a greenfield preamble that uses a short guard interval are described. According to one embodiment, a wireless communication device includes a receiver configured to receive an orthogonal frequency-division multiplexing (OFDM) signal. The OFDM signal includes a greenfield preamble. The wireless communication device includes an interval select logic configured to determine a type of guard intervals in the OFDM signal based, at least in part, on the greenfield preamble. The wireless communication device includes a signal processor configured to process the OFDM signal based, at least in part, on the type of the guard intervals as determined by the interval select logic.

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Номер записи: 52

29-11-2012 дата публикации

Method and apparatus for transmitting control information in wireless communication system

Номер: US20120300726A1

Автор: Jae Hoon Chung, Moon Il Lee, Seung Hee Han, Sung Ho Moon

Принадлежит: LG ELECTRONICS INC

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control signal via a PUCCH in a wireless communication system, and to an apparatus for the method, wherein the method comprises the following steps: joint-coding a plurality of pieces of control information to obtain a single codeword; obtaining a first modulation symbol sequence from the single codeword; obtaining, from the first modulation symbol sequence, a plurality of second modulation symbol sequences corresponding to each slot in the PUCCH; cyclically shifting the plurality of second modulation symbol sequences in a time domain to obtain a plurality of third modulation symbol sequences; performing a discrete Fourier transform (DFT) precoding process on the plurality of third modulation symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH.

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Номер записи: 53

06-12-2012 дата публикации

Methods and apparatus to transmit and receive synchronization signal and system information in a wireless communication system

Номер: US20120307726A1

Автор: Farooq Khan, Ying Li, Zhouyue Pi

Принадлежит: SAMSUNG ELECTRONICS CO LTD

A base station transmits a plurality of primary synchronization channel (PSC) symbols to a mobile station in a slot of a subframe of a frame-based wireless communication system. The base station also transmits a plurality of secondary synchronization channel (SSC) symbols to the mobile station in the slot of the subframe. The mobile station determines a preferred receiver beam based on the plurality of received consecutive PSC symbols.

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Номер записи: 54

13-12-2012 дата публикации

Method and apparatus for implementing preamble generation

Номер: US20120314561A1

Автор: Tianmin Ren, Yining Xie

Принадлежит: ZTE Corp

The disclosure involves a method and an apparatus for implementing preamble generation. The method comprises: obtaining a first parameter value according to a root sequence number of a Zadoff-Chu (ZC) sequence; obtaining an initial value of a first sequence, according to a length and a cyclic shift value of the ZC sequence and the obtained first parameter value; performing iterative calculatings on the first sequence according to the initial value of the first sequence and the first parameter value; performing iterative calculatings on a second sequence according to the iteratively calculated values of the first sequence and a preset initial value of the second sequence; performing Discrete Fourier Transform (DFT) on the iteratively calculated values of the second sequence. The method and apparatus in the disclosure can achieve low complexity and high calculation precision in the calculation process and greatly reduce the amount of calculation and storage.

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Номер записи: 55

27-12-2012 дата публикации

Method and apparatus for transmitting a frame in a wireless ran system

Номер: US20120327862A1

Автор: Bong Hoe Kim, Byeong Woo Kang, Dae Won Lee, Yong Ho Seok, Yu Jin Noh

Принадлежит: Individual

There is provided a method and apparatus for transmitting a frame which is performed by a transmission STA in a WLAN system. The method of transmitting a frame includes generating an MAC Protocol Data Unit (MPDU) to be transmitted to a target station, generating a PLCP Protocol Data Unit (PPDU) by attaching a Physical Layer Convergence Procedure (PLCP) header to the MPDU, and transmitting the PPDU to the target station. The PLCP header comprises a partial Association ID (AID) of the target station.

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Номер записи: 56

27-12-2012 дата публикации

Terrestrial Based High Speed Data Communications Mesh Network

Номер: US20120327906A1

Автор: Donald Alcorn

Принадлежит: SMARTSKY NETWORKS LLC

A network for providing high speed data communications may include multiple terrestrial transmission stations that are located within overlapping communications range and a mobile receiver station. The terrestrial transmission stations provide a continuous and uninterrupted high speed data communications link with the mobile receiver station employing a wireless radio access network protocol.

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Номер записи: 57

03-01-2013 дата публикации

Control Channels in Multicarrier OFDM Transmission

Номер: US20130003672A1

Автор: Esmael Dinan

Принадлежит: Individual

A base station transmits control information on a subframe of a first carrier starting from the first OFDM symbol of the subframe. The control information provides transmission format and scheduling information for data packets transmitted on a first data channel of the first carrier. The base station transmits a control message on the first data channel to a wireless device. The control message configures radio resources of a second data channel to start from the first OFDM symbol of subframes of a second carrier. The base station transmits data packets on the second data channel.

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Номер записи: 58

10-01-2013 дата публикации

Method and apparatus for an adaptive filter architecture

Номер: US20130010852A1

Автор: Amr Abdelmonem, Sean S. Cordone

Принадлежит: ISCO International LLC

A system that incorporates teachings of the subject disclosure may include, for example, a method for identifying a spectral region in a radio frequency spectrum, determining a signal strength of the spectral region, determining a correlation factor by correlating the signal strength of the spectral region, detecting according to the correlation factor interference in the spectral region, generating coefficient data to substantially suppress the interference in the spectral region, configuring a filter according to the coefficient data to substantially suppress the interference in the spectral region and produce a digital filtered signal, and transmitting the digital filtered signal to a base station. Other embodiments are disclosed.

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Номер записи: 59

17-01-2013 дата публикации

Signaling method in an ofdm multiple access system

Номер: US20130016678A1

Автор: Junyi Li, Rajiv Laroia, Sathyadev Venkata Uppala

Принадлежит: Qualcomm Inc

A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

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Номер записи: 60

17-01-2013 дата публикации

Method and apparatus for determining channel state information

Номер: US20130016767A1

Автор: Andreas Bury, Johan Pean

Принадлежит: INTEL MOBILE COMMUNICATIONS TECHNOLOGY DRESDEN GMBH

A mobile station receiving a signal from a base station experiences time/frequency varying channel conditions. In order to get the maximum throughput from a base-station, it is necessary to adjust the modulation and coding schemes to the actual channel quality. To do so, mobile receivers are required to probe the radio channel condition and feedback a limited set of estimated channel state information parameters such as CQI, RI, and PMI. The invention uses modulation-specific mutual information as a basic metric for CQI-PMI-RI computation to yield high bandwidth efficiency under both flat fading and interference conditions as well as time and frequency selective fading and interference conditions, at reasonable complexity.

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Номер записи: 61

24-01-2013 дата публикации

Feedback information in a multi-carrier wireless telecommunications network

Номер: US20130021913A1

Автор: Matthew P. J. Baker, Sarah Boumendil, Shin Horng Wong

Принадлежит: Alcatel Lucent SAS

Apparatus and method for encoding and transmitting feedback information from a first network node to a second network node in a multi-carrier wireless telecommunications network. The first network node is operable to receive signals from the second network node on two or more reception carriers and transmit data to the second network node on one or more transmission carriers. Each reception carrier being transmitted within an associated a radio band. The method comprises the steps of: (i) monitoring for a signal on at least two of the reception carriers; (ii) generating feedback information for at least two of the reception carriers based upon received signals; (iii) grouping the feedback information for reception carriers being transmitted within the same radio band; and encoding said grouped feedback information for two or more reception carriers being transmitted within the same radio band; and iv) transmitting the encoded feedback information to the second network node on one or more transmission carriers.

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Номер записи: 62

24-01-2013 дата публикации

Recovering data from a secondary one of simultaneous signals, such as orthogonal-frequency-division-multiplexed (ofdm) signals, that include a same frequency

Номер: US20130022091A1

Автор: George A. Vlantis, KARTHIK Muralidhar

Принадлежит: STMICROELECTRONICS ASIA PACIFIC PTE LTD, STMicroelectronics lnc USA

An embodiment of a receiver includes a channel estimator and a data-recovery unit. The channel estimator is configured to determine a characteristic of a channel over which a first signal, which is received simultaneously with a second signal, propagated, the first and second signals respectively having first and second components that include approximately a frequency. And the data-recovery unit is configured to recover data from the first signal in response to the determined channel characteristic. For example, such a receiver may be able to receive simultaneously, and over the same channel space, orthogonal-frequency-division-multiplexed (OFDM) signals that include one or more of the same subcarrier frequencies, and to recover data from one or more of the OFDM signals despite the frequency overlap. A receiver with this capability may allow an increase in the effective bandwidth of the channel space, and thus may allow more devices to simultaneously share the channel space.

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Номер записи: 63

14-02-2013 дата публикации

Synchronization of a Receiver to a Desired Signal

Номер: US20130039404A1

Автор: Sujai Chari

Принадлежит: Posedge Inc

Apparatuses, methods and systems of synchronizing a receiver to a desired signal are disclosed. One method includes obtaining synchronization information of an interfering signal, and adjusting an out-of-band response of a receiver filter based at least in part on the synchronization information of the interfering signal, wherein the in-band response of the receiver filter is determined by frequency components of the desired signal.

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Номер записи: 64

21-02-2013 дата публикации

Long range wlan data unit format

Номер: US20130044688A1

Автор: Harish Ramamurthy, Hongyuan Zhang, Yong Liu

Принадлежит: MARVELL WORLD TRADE LTD

In a method for generating a data unit for transmission in a wireless network, a physical layer (PHY) preamble is generated. A field to indicate whether an acknowledgment data unit is intended to follow the data unit is generated and included in the PHY preamble. A media access control layer (MAC) header is generated, and the data unit is generated to include the PHY preamble and the MAC header. The data unit is transmitted.

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Номер записи: 65

14-03-2013 дата публикации

Receiving apparatus and data obtaining method

Номер: US20130064184A1

Автор: Hiroyuki Ishii

Принадлежит: Individual

A receiving apparatus for communication area evaluation includes a receiving unit configured to receive a first signal transmitted from a base station; a delay profile calculation unit configured to calculate a downlink delay profile based on the first signal; and an estimated value calculation unit configured to calculate an estimated cyclic prefix length based on the calculated downlink delay profile.

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Номер записи: 66

28-03-2013 дата публикации

Method and apparatus for allocating and transmitting time and frequency resource for resource request indicator

Номер: US20130077598A1

Автор: Chengyu Wang, Sha Ma, Shujun Dang, Tianle Deng, Xianghua Wang, Xiaobo Chen

Принадлежит: Huawei Technologies Co Ltd

Method and apparatus are provided to allocate a time and frequency resource of a resource request indicator (RRI) and to transmit an RRI. Codes are allocated for an RRI and other (such as non-RRI) uplink control signaling. The RRI and other uplink control signaling can be multiplexed in the same time and frequency resource, such as through multiplexing in a code division manner.

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Номер записи: 67

28-03-2013 дата публикации

Signal transmission method and apparatus using codebook in wireless communication system supporting multiple antennas

Номер: US20130077660A1

Автор: Hyun Soo Ko, Jae Hoon Chung, Moon Il Lee, Seung Hee Han

Принадлежит: LG ELECTRONICS INC

The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the PMI, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2×2 matrix containing four matrices (W1s), the matrix (W1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2×2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient “a” of a phase, and the first column of the second row being multiplied by “−a”.

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Номер записи: 68

18-04-2013 дата публикации

Ofdm communication system and method having a reduced peak-to-average power ratio

Номер: US20130094614A1

Автор: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger

Принадлежит: AT&T Corp

An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.

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Номер записи: 69

25-04-2013 дата публикации

Transmission of Information in a Wireless Communication System

Номер: US20130100833A1

Автор: HUA Xu, Mark Earnshaw, Mo-Han Fong, Robert Mark Harrison, Sean McBeath, Youn Heo, Zhijun Cai

Принадлежит: Individual

Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method of transmission in a wireless communication system comprises determining by a wireless device ( 201 ) a configuration of a plurality of power amplifiers ( 207 ) to achieve a single antenna transmission mode; amplifying a signal by said wireless device ( 201 ) using the configuration of the plurality of power amplifiers ( 207 ) to form a plurality of amplified signals; simultaneously transmitting at or about the same time by the wireless device ( 201 ) to a base station ( 202 ) the plurality of amplified signals from a plurality of physical antennas ( 212 ), wherein the plurality of physical antennas ( 212 ) are coupled to the configuration of the plurality of power amplifiers ( 207 ); and wherein the measured transmit power from the totality of the plurality of physical antennas ( 212 ) is about the same as the required transmit power using the single antenna transmission mode.

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Номер записи: 70

25-04-2013 дата публикации

HYBRID ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS WTRU AND METHOD

Номер: US20130100995A1

Автор: Pan Jung-Lin, Tsai Yingming, Zhang Guodong

Принадлежит:

A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data. 119-. (canceled)20. An apparatus , comprising circuitry to:receive information mapped to a first group, a second group, and a third group of subcarriers for transmission in a first symbol time interval;wherein a first portion of the information is spread, using orthogonal sequences, on the first group of subcarriers for a plurality of user equipments (UE)s;wherein a second portion of the information is mapped on the second group of subcarriers for one UE; andwherein a third portion of the information is pilot information mapped to the third group of subcarriers.21. The apparatus of claim 20 , wherein each of the orthogonal sequences used for each UE of the plurality of UEs is different.22. The apparatus of claim 20 , wherein the second portion of the information is not spread using orthogonal sequences.23. The apparatus of claim 20 , wherein the pilot information is spread over the third group of subcarriers.24. The apparatus of claim 20 , further comprising mapping the second portion of information on a second symbol time interval.25. The apparatus of claim 24 , wherein the second portion of information is mapped to consecutive subcarriers in the second symbol time interval.26. The apparatus of claim 20 , wherein the first portion of the information is spread on the first group of subcarriers in the frequency domain.27. A wireless transmit/receive unit (WTRU) claim 20 , to:spread multi-user input data using orthogonal sequences in a first symbol time interval of a orthogonal frequency multiple access (OFDMA) frame; wherein the multi-user input data is for a ...

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Номер записи: 71

25-04-2013 дата публикации

Sub-Band Power Scaling Reporting and Sub-Band Transmit Power Estimation

Номер: US20130101055A1

Автор: Anand Dabak, Il Han Kim, Kumaran Vijayasankar, Ramanuja Venantham, Tarkesh Pande

Принадлежит: Texas Instruments Inc

Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method performed by a PLC device, such as a PLC meter, may include selecting one or more transmit sub-bands on which to transmit frames, where the transmit sub-bands comprise groups of six carrier frequencies. The PLC device then generates a frame comprising a tone map that indicates which transmit sub-bands are used to carry data for the frame. The tone map using two bits per transmit sub-band to indicate a status of each transmit sub-band. The PLC device then transmits the frame on the selected transmit sub-bands using OFDM. A resolution bit and a mode bit may be used to provide additional information about the transmit sub-bands, such as an amount of power adjustment that has been applied to carrier frequencies and whether dummy bits are transmitted on unused carrier frequencies.

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Номер записи: 72

02-05-2013 дата публикации

Low Latency Channel Estimation for Downlink MIMO

Номер: US20130107694A1

Автор: Elias Jonsson, YANG Hu

Принадлежит: Telefonaktiebolaget LM Ericsson AB

When more than two layers are multiplexed in one CDM group, length-4 OCC has to be used across both clusters in one subframe. This means that slot-by-slot channel estimation according to conventional schemes cannot be exploited and Doppler impact cannot be well overcome. By introducing virtual variables and virtual channel samples that are used in processing two time slots in a subframe independently and applying a frequency domain filter based on the virtual variables and then performing postprocessing based on virtual channel samples, slot-by-slot processing is possible to reduce latency and overcome Doppler impact. Code de-spreading of length-4 OCC is no longer processed in time domain, but in frequency domain with two adjacent CDM subgroups. As a result, the frequency domain filtering can start earlier whereby detection latency and processing time for OCC of length longer than 2 is reduced. It can also be used for the length-2 OCC.

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Номер записи: 73

02-05-2013 дата публикации

COMMUNICATION DEVICE AND COMMUNICATION SYSTEM

Номер: US20130107976A1

Автор: Kajiwara Keishi, Matsutani Takashi, Motooka Shigenori

Принадлежит: MegaChips Corporation

A communication device includes: a reception element for receiving a radio signal modulated in a first modulation scheme or a second modulation scheme; a first demodulation element for demodulating the received radio signal in a first demodulation scheme corresponding to the first modulation scheme; a second demodulation element for demodulating the received radio signal in a second demodulation scheme corresponding to the second modulation scheme; and a modulation scheme detection section for detecting a modulation scheme of the received radio signal. The received radio signal includes modulation scheme determination information. The modulation scheme detection section detects the modulation scheme of the received radio signal based on a result of demodulation of the modulation scheme determination information performed by the first demodulation element and a result of demodulation of the modulation scheme determination information performed by the second demodulation element. 18-. (canceled)9. A communication device comprising:a reception element for receiving a radio signal modulated in a first modulation scheme or a second modulation scheme;a first demodulation element for demodulating said radio signal in a first demodulation scheme corresponding to said first modulation scheme;a second demodulation element for demodulating said radio signal in a second demodulation scheme corresponding to said second modulation scheme; anda modulation scheme detection element for detecting a modulation scheme of said radio signal,whereinsaid radio signal includes predetermined information,said modulation scheme detection element detects the modulation scheme of said radio signal based on a result of demodulation of said predetermined information performed by said first demodulation element and a result of demodulation of said predetermined information performed by said second demodulation element.108. The communication device according to claim , whereinsaid modulation scheme ...

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Номер записи: 74

09-05-2013 дата публикации

Almost-Blank Subframe Configuration Detection in Heterogeneous Networks

Номер: US20130114435A1

Автор: Fredrik Nordström, Jianfeng Wang, Matthias Kamuf, Shaohua Li

Принадлежит: Telefonaktiebolaget LM Ericsson AB

A method for detecting an Almost-Blank Subframe (ABS) configuration for an interfering macro cell of a heterogeneous network is implemented in a wireless terminal. For one or more resource blocks in a received signal, a first power metric is calculated as a function of channel response estimates determined for predicted cell-specific (or common) reference signal (CRS) resource element locations in a plurality of symbols. For the one or more resource blocks in the received signal, a second power metric is calculated as a function of channel response estimates determined for the predicted CRS resource element locations in a single one of the plurality of symbols. A difference between the first and second power metrics is compared to a threshold, and responsive to the comparison a determination is made as to whether the macro cell is operating in a Multicast and Broadcast Single Frequency Network (MBSFN) mode or a non-MBSFN mode.

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Номер записи: 75

16-05-2013 дата публикации

SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING

Номер: US20130121131A1

Автор: Anderson Brian D., Berg Darrell, Boualouang Somvay, Brede Jeffrey, Buska Steven P., Chiappetta Joseph F., Dapper Mark J., Downs Matt, Elpers Mark D., Enfield Debra Lee, Ferris Tammy, Fort Michael J., Geile Michael J., Hall Joe, Herrmann James J., Hill Terrance J., Kirscht Robert J., Logajan John M., Lou Heng, Nelson Calvin G., Opoczynski Adam, Roberts Harold A., Russell David S., Samant Niranjan R., Sarnikowski Scott, Smigelski Thomas, Solum Jeff, Tucker Thomas C., Wadman Mark S.

Принадлежит:

Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals to produce a receiver output; a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals; a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform to the data transmitted by the transmitter; the processor coupled to the receiver, wherein the processor applies a Fourier transform to the receiver output; and a controller programmed to instruct the transmitter to transmit at least one symbol representing a request for bandwidth allocation on a first carrier; wherein the controller is further programmed to determine when a collision has occurred on the first carrier. 1. A remote unit using frequency guard bands in a multipoint-to-point communication system in which orthogonal frequency division multiplexed carriers are used for carrying upstream and downstream communications , and in which more than one remote unit , after receiving allocations of orthogonal frequency division multiplexed carriers for upstream communications , may transmit upstream communications that are received at a host at the same time , the remote unit comprising:a radio frequency receiver communicatively coupled with the host unit, the radio frequency receiver receiving downstream communications carried on orthogonal carriers;a radio frequency transmitter communicatively coupled with the host unit in a multipoint-to-point configuration, the radio frequency transmitter configured to transmit upstream payload communications using orthogonal carriers allocated by the host;the radio frequency transmitter including at least one converter that generates an analog signal based on ...

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Номер записи: 76

16-05-2013 дата публикации

Receiver and method of estimating signal to noise power ratio

Номер: US20130122843A1

Автор: Masahito Sakai

Принадлежит: NEC Corp, NTT DOCOMO INC

Provided are a receiver and a method of estimating signal to noise power ratio. The receiver estimates a signal-to-noise power ratio, according to an average value of a signal power and an average value of a noise power of a reference signal mapped to the received signal, estimates signal-to-noise power ratio by means of EESM operation according to each signal-to-noise power ratio of the reference signal, makes a judgment on a magnitude of either the signal-to-noise power ratio appointed according to the average values or the signal-to-noise power ratio estimated by means of the EESM operation, and outputs one of the signal-to-noise power ratio appointed according to the average values and the signal-to-noise power ratio estimated by means of the EESM operation, as a reception quality SNR, in response to the judgment result.

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Номер записи: 77

23-05-2013 дата публикации

Transmission method, transmitter, and receiver for multi antenna wireless communication system

Номер: US20130129001A1

Автор: Koji Akita, Ren Sakata

Принадлежит: Toshiba Corp

A transmitter includes first generator to generate pilot source signal by modulating pilot sequence, second generator to generate data source signal with time length longer than that of pilot source signal by modulating data sequence, first cyclic shifter to perform cyclic shift of first shift amount to pilot source signal to generate first pilot signal, second cyclic shifter to performs cyclic shift of second shift amount to data source signal to generate first data signal, third cyclic shifter to perform cyclic shift of third shift amount to pilot source signal to generate second pilot signal, fourth cyclic shifter to perform cyclic shift of fourth shift amount to data source signal to generate second data signal, first transmit antenna to transmit first pilot signal and first data signal, and second transmit antenna to transmit second pilot signal and second data signal.

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Номер записи: 78

06-06-2013 дата публикации

Control Channel Detection

Номер: US20130142288A1

Автор: Esmael Hejazi Dinan

Принадлежит: Individual

A wireless device at least demodulates, descrambles and decodes a first control signal to generate a first signal. The wireless device processes the first signal by at least encoding, scrambling, modulating and scaling the first signal. The wireless device subtracts the processed first signal from received signals to generate a second signal. The wireless device at least demodulates, descrambles and decodes the second signal to generate a second control message.

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Номер записи: 79

13-06-2013 дата публикации

System and method for ask ofdm transmission and reception

Номер: US20130148764A1

Автор: Shouxing Qu

Принадлежит: Research in Motion Ltd

An OFDM system and method using amplitude shift keying (ASK) for subcarrier modulation is provided. Because ASK is used, the signal of each symbol in time domain is conjugate-symmetric. In addition, among the discrete numbers of each symbol, two of them are always real. These properties are utilized such that only half of the numbers of each symbol sequence are transmitted. The generated baseband signal can be a complex or a real signal. As a result, the bandwidth efficiency of the derived ASK-OFDM is the same as that of QAM-OFDM.

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Номер записи: 80

20-06-2013 дата публикации

Multiple channel system for a twisted pair telephone wire local loop system

Номер: US20130155893A1

Автор: Dale Brian Halling, Edward R. Folds, Nelson Leon Ledbetter, Phillip George Skeba, Thomas J.J. Starr

Принадлежит: AT&T INTELLECTUAL PROPERTY I LP

Example multiple channel systems for a twisted pair telephone wire local loop system are disclosed. An example method includes implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway.

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Номер записи: 81

20-06-2013 дата публикации

System and method for frequency diversity

Номер: US20130156124A1

Автор: Ashok Mantravadi, Fuyun Ling, Michael Mao Wang, Murali Ramaswamy Chari, Raghuraman Krishnamoorthi, Rajiv Vijayan

Принадлежит: Qualcomm Inc

A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved in the bit reversal fashion.

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Номер записи: 82

04-07-2013 дата публикации

Special Subframe Configuration in Wireless Networks

Номер: US20130170376A1

Автор: Esmael Hejazi Dinan

Принадлежит: Individual

A base station configures a first set of subframes on a first carrier as special subframes. The base station transmits at least one unicast control message to a wireless device. The at least one unicast control message configures a second carrier. The base station configures the second carrier to enter a special subframe for every subframe in which the first carrier enters a special subframe, and the second carrier is activated.

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Номер записи: 83

04-07-2013 дата публикации

Almost Blank Subframe Indication in Wireless Networks

Номер: US20130170396A1

Автор: Esmael Hejazi Dinan

Принадлежит: Individual

A base station transmits a first unicast control message configuring transmission parameters of a first carrier for a wireless device. The base station transmits at least one second unicast message configuring measurement parameters of a second carrier. The measurement configuration comprises a first and a second measurement subframe allocation bitmap for the second carrier. The base station receives first and second channel state information from the wireless device. The base station transmits data packets to the wireless device. The data packets are encoded and modulated based on the first and second channel state information.

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Номер записи: 84

04-07-2013 дата публикации

SPLITTERLESS MULTICARRIER MODEM

Номер: US20130170632A1

Автор: Greszczuk John A., Gross Richard W., Krinsky David M., Tzannes Marcos C., Tzannes Michael A.

Принадлежит: Intellectual Ventures II LLC

A modem for use in Digital Subscriber Line communications transmits and receives data over the local subscriber loop in common with voice information over the loop, while avoiding the need for voice/data splitters. The modem responds to disruptions associated with “disturbance events” such as on-hook to off-hook transitions and the like by rapidly switching between pre-stored channel parameter control sets defining communications over the loop under varying conditions. In addition to changing parameter control sets responsive to a disturbance event, the modem may also change transmission power levels and other system parameters such as frequency domain equalizer characteristics. Further, provisions are made for reduced bandwidth communications under selected conditions. 1. (canceled)2. A method in asymmetric digital subscriber loop (ADSL) communications having both upstream and downstream communication subchannels formed from a plurality of subchannels , comprising:storing a first table defining data communications during a first communication condition between a modem and a second modem connected to said loop in an absence of disturbance events;storing a second table defining data communications during a second communication condition between said modem and said second modem responsive to shifts in an amplitude and phase of at least one of said communication subchannels over successive frames; andgenerating a signal to initiate switching of said first and second tables when said shifts exhibit a defined pattern.3. The method of claim 2 , wherein said first and second tables define a number of bits transmitted over the respective communication subchannels.4. The method of claim 2 , wherein said disturbance events comprise signaling events selected from a group including off-hook claim 2 , on-hook claim 2 , ringing claim 2 , and busy.5. The method of claim 2 , wherein said generating the signal to initiate switching of said first and second tables includes ...

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Номер записи: 85

18-07-2013 дата публикации

Data unit format for single user beamforming in long-range wireless local area networks (wlans)

Номер: US20130182662A1

Автор: Hongyuan Zhang, Raja Banerjea

Принадлежит: MARVELL WORLD TRADE LTD

A method includes generating a preamble of a first data unit according to a first format. Generating the preamble of the first data unit according to the first format includes generating a first preamble portion of the first data unit and generating a second preamble portion of the first data unit. The first preamble portion of the first data unit includes information indicating to a receiving device that the first data unit is a single-user data unit, and the second preamble portion of the first data unit follows the first preamble portion of the first data unit. The method also includes applying a beamforming steering matrix to the second preamble portion of the first data unit but not to the first preamble portion of the first data unit.

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Номер записи: 86

18-07-2013 дата публикации

Method and device for transmitting control information

Номер: US20130182675A1

Автор: Dongyoun Seo, Joonkui Ahn, Mingyu Kim, Suckchel Yang

Принадлежит: LG ELECTRONICS INC

The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus for the same. The present invention relates to a method and to a device for said method which comprises the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and transmitting a bit value corresponding to the plurality of HARQ-ACKs by using the selected uplink control channel resource.

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Номер записи: 87

01-08-2013 дата публикации

Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications

Номер: US20130194992A1

Автор: Matthew James Fischer

Принадлежит: Broadcom Corp

Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications. If a communication (e.g., transmission) attempt fails (e.g., by a wireless station (STA), smart meter station (SMSTA), etc.), then a backoff snooze countdown may be performed before a subsequent communication is attempted. Also, if communication activity is detected on the communication medium, then such a backoff snooze countdown may be performed before monitoring the communication medium or a subsequent communication attempt is made. Such a backoff snooze countdown may be based on a codeword value (e.g., such as provided within a beacon received from an access point (AP)), and different respective backoff snooze countdowns may be made based on different respective codeword values. Such backoff snooze countdowns are performed outside of a restricted access window (RAW) in which only devices of a particular class (e.g., low-power, Z, etc.) have access to the communication medium.

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Номер записи: 88

01-08-2013 дата публикации

Cyclic prefix in evolved multimedia broadcast multicast service with high transmit power

Номер: US20130195002A1

Автор: Gordon Kent Walker, Jun Wang, Xiaoxia Zhang

Принадлежит: Qualcomm Inc

A method, an apparatus, and a computer program product for wireless communication are provided in which a cyclic prefix duration for orthogonal frequency division multiple access symbols is determined. The cyclic prefix duration is calculated to reduce inter-symbol interference associated with a transmitter located at a distance that is more than 5 kilometers from one or more user equipment. Subcarrier spacing is determined and a symbol size for the symbols is determined. One or more of an enhanced Node B and a user equipment is configured with the cyclic prefix duration, the subcarrier spacing and the symbol size.

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Номер записи: 89

01-08-2013 дата публикации

Centralized control of intra-cell device-to-device communication

Номер: US20130195026A1

Автор: Kerstin Johnsson, Nageen Himayat, Shilpa Talwar

Принадлежит: Intel Corp

An apparatus and method to centrally establish and control intra-cell device-to-device connections on licensed bands of a wireless communications network are disclosed herein. An eNodeB receives a request from a first device to communicate with a second device or a request from the first device for content or service. The eNodeB schedules a device discovery between the first device and at least a candidate device. The eNodeB determines establishing the device-to-device connection between the first device and the candidate device based on a discovery report generated by one of the first or candidate device. The discovery report comprises information about signal quality of transmission from the other one of the first or candidate device that is received by the one of the first or candidate device during the scheduled device discovery.

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Номер записи: 90

01-08-2013 дата публикации

METHOD FOR MULTIPLEXING UPLINK CONTROL INFORMATION ON A PHYSICAL UPLINK SHARED CHANNEL

Номер: US20130195122A1

Автор: Li Shupeng

Принадлежит: ZTE USA INC.

A method of selecting resource element for UCI transmission and countering a ping-pong effect includes adjusting transmission parameters without adjusting a channel quality indicator/pre-coding matrix index. The transmission parameters include a modulation coding set of a transport block and a transport block size. Another method of selecting resource element for UCI transmission and countering the ping-pong effect includes selecting a transport block having a highest modulation coding set index or the transport block having a lowest modulation coding set index. Alternatively, the evolved Node B may select the transport block having a largest size or the transport block having the smallest size. 1. A method of countering a ping-pong effect , the method comprising:adjusting, by an evolved node B, a transmission parameter, wherein the transmission parameter includes at least one of a modulation coding set of a transport block and a transport block size.2. A method of countering a ping-pong effect in a wireless system , the method comprising:selecting, at an evolved node B, a transport block having one of a highest modulation coding set index, a lowest modulation coding set index, a largest transport block size, or a smallest transport block size.3. A method of selecting a code word to transmit a channel quality indicator/pre-coding matrix index in a wireless system having user equipment in a single user-multiple input multiple output mode , the method comprising:disabling, on a physical downlink control channel, a first code word; andmultiplexing or transmitting the channel quality indicator/pre-coding matrix index on a transport block corresponding to a second code word.4. A method of selecting a code word to transmit a channel quality indicator/pre-coding matrix index in a wireless system having user equipment in a single user-multiple input multiple output mode , the method comprising:transmitting the channel quality indicator/pre-coding matrix index on a transport ...

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Номер записи: 91

15-08-2013 дата публикации

Method for transmitting sounding reference signal in multiple antenna wireless communication system and apparatus therefor

Номер: US20130208773A1

Автор: Hyunsoo Ko, Jaehoon Chung, Minseok Noh, Moon-Il Lee

Принадлежит: LG ELECTRONICS INC

A method for transmitting a sounding reference signal from a user equipment in a MIMO antenna wireless communication system is disclosed. The method comprises receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value n SRS cs and an initial transmissionComb parameter value k TC ; setting an interval between cyclic shift values corresponding to each antenna port based on the initial cyclic shift value, to reach a maximum interval; setting a transmissionComb parameter value corresponding to a specific one of the antenna ports to a value different from the initial transmissionComb parameter value if the initial cyclic shift value is a previously set value and the number of antenna ports is 4; and transmitting the sounding reference signal to the base station through each antenna port by using the set cyclic shift value and transmissionComb parameter value.

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Номер записи: 92

15-08-2013 дата публикации

ADAPTIVE IMPULSE NOISE MITIGATION

Номер: US20130208816A1

Автор: Khangosstar Javad, Mehboob Anser, Zhang Li

Принадлежит: PACE PLC

A data transmission system and method is provided for the transmission data signal to one or receiving locations. A Multi Mode Compressive Sensing (MMCS) scheme is provided which adaptively changes the number of pilots used to reconstruct the Impulsive Noise (IN) depending on the IN's current severity so as to mitigate the same and stabilise the Bit Error Rate (BER) of the transmitted data signals and so improve the overall transmission system data throughput. The system can also allow for a variable IN mitigation range in order to allow the concurrent control of the BER and data throughput in the data transmission system. 1. A method for the mitigation of the effects of Impulsive Noise (IN) in an Orthogonal Frequency Division Multiplexing (OFDM) based data communication system characterised in that said method includes the steps of transmitting a plurality of OFDM frames via said communication system as a signal to one or more receiving locations , identifying a number of impulses occurring with respect to the data signal at that time and/or at a predetermined time and , if the said number of impulses exceeds at least one predefined level , changing the required number of zero-subcarriers used in the data signal in order to reconstruct the IN for the next transmission of OFDM frames.2. A method according to wherein the estimating of the number of impulses is performed continuously and the method adapted in response thereto.3. A method according to wherein the method utilises compressive sensing to reconstruct the IN.4. A method according to wherein once the IN has been reconstructed claim 1 , it is subtracted from the signal in the time domain.5. A method according to wherein the IN is subtracted from the received OFDM frame.6. A method according to wherein the method is applied to the data communication system in which the IN sparsity changes variably over time.7. A method according to wherein the communication system is a Power Line Communication (PLC) system.8. ...

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Номер записи: 93

15-08-2013 дата публикации

SYSTEMS, METHODS, AND DEVICES TO PERFORM INTERLEAVING

Номер: US20130208821A1

Автор: Sampath Hemanth, Van Nee Didier Johannes Richard, Vermani Sameer, Yang Lin

Принадлежит: QUALCOMM INCORPORATED

An apparatus includes an interleaver configured to interleave encoded data and to output a series of interleaved bits to be transmitted via a 1 MHz orthogonal frequency-division multiplexing (OFDM) transmission. The apparatus also includes a modulator configured to modulate the interleaved bits and a transform module configured to transform the modulated bits. A transmit module of the apparatus is configured to transmit the transformed bits included in one or more spatial streams of the 1 MHz OFDM transmission. 1. A wireless communications apparatus comprising: a block size of twenty four;', 'an interleaver depth of eight;', 'interleaved rotation indexes of 0, 2, 1, 3 corresponding to up to four spatial streams; and', 'a base subcarrier rotation of less than or equal to nine; and, 'an interleaver configured to interleave encoded data and to output a series of interleaved bits, the interleaver comprising one or more stream interleavers corresponding to one or more spatial streams, the one or more stream interleavers configured to perform interleaving based ona transmit module configured to transmit the interleaved bits included in the one or more spatial streams.2. The wireless communication apparatus of claim 1 , wherein the base subcarrier rotation is equal to two.3. The wireless communication apparatus of claim 1 , further comprising one or more antennas configured to transmit the one or more spatial streams.4. The wireless communication apparatus of claim 1 , wherein the interleaver comprise a stream parser configured to parse the encoded data to each of the one or more stream interleavers.5. The wireless communication apparatus of claim 1 , wherein the transmit module is configured to transmit using a 1 MHz multiple input multiple output orthogonal frequency-division multiplexing (MIMO-OFDM) transmission.6. The wireless communication apparatus of claim 1 , wherein the transmit module is configured to transmit orthogonal frequency-division multiplexing (OFDM) ...

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Номер записи: 94

15-08-2013 дата публикации

PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM

Номер: US20130208824A1

Автор: STIRLING-GALLACHER Richard, WANG Zhaocheng

Принадлежит: Sony Deutschland GmbH

A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension. 1. (canceled)2. A transmitter that transmits data symbols in an orthogonal frequency division multiplex (OFDM) system , the transmitter comprising: a first pair of symbols for channel estimation via a first subcarrier from a first source, the first pair of symbols based on a first pattern;', 'a second pair of symbols for channel estimation via the first subcarrier from a second source spatially different from the first source, the second pair of symbols based on a second pattern and being orthogonal to the first pair of symbols;', 'a first data symbol from one of the first source and the second source; and', 'a second data symbol from another of the first source and the second source., 'circuitry configured to control transmission of3. The transmitter of claim 2 , whereina first symbol of the first pair of symbols and a first symbol of the second pair of symbols are identical, anda second symbol of the second pair of symbols is inverted with respect to a second symbol of the first pair of symbols.4. The transmitter of claim 2 , whereina first symbol of the second pair of symbols is inverted with ...

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Номер записи: 95

22-08-2013 дата публикации

Overlay Modulation Technique for COFDM Signals Based on Amplitude Offsets

Номер: US20130215984A1

Автор: Carl Scarpa, Christopher Strolle, Edward Schell

Принадлежит: Sirius XM Radio Inc

Systems and methods are presented for transmitting additional data over preexisting differential COFDM signals by changing the amplitude of the legacy data symbols. In exemplary embodiments of the present invention, additional data capacity can be achieved for a COFDM signal which is completely backwards compatible with existing legacy satellite broadcast communications systems. In exemplary embodiments of the present invention, additional information can be overlaid on a legacy COFDM signal by applying an amplitude offset to the legacy symbols. In exemplary embodiments of the present invention, special receiver processing can be implemented to extract this additional information, which can include performing channel equalization across frequency bins to isolate the amplitude modulated overlay signal. For example, at each FFT symbol time, average power across neighboring active data bins can be used to determine the localized power at the corresponding FFT bins, and a channel inversion can then, for example, be performed on the data bins to restore, as best as possible, the original transmitted symbol amplitude.

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Номер записи: 96

22-08-2013 дата публикации

SYSTEMS AND METHODS FOR DETECTING TRANSMISSIONS BASED ON 32-POINT AND 64-POINT FAST FOURIER TRANSFORMS

Номер: US20130215993A1

Автор: Taghavi Nasrabadi Mohammad Hossein, Vermani Sameer

Принадлежит: QUALCOMM INCORPORATED

Systems, methods, and devices for communicating and detecting training sequences are described herein. In one aspect, a method of wireless communication is provided. The method comprises receiving one or more short training field (STF) sequences comprising sixty-four values or less. The STF sequences comprise zero and non-zero values. The non-zero values are located at one or more indices of the STF that are separated by a multiple of at least four. The method further comprises determining a first correlation between the STF and the STF shifted by a first shift length. The method further comprises determining a second correlation between the STF and the STF shifted by a second shift length. The method further comprises determining a fast Fourier transform (FFT) size based on the first correlation and the second correlation. The method further comprises decoding one or more data symbols based at least in part on the determined FFT size. 1. A method of wireless communication , comprising:receiving one or more short training field (STF) sequences comprising sixty-four tone values or less, wherein the one or more STF sequences comprise zero and non-zero tone values, wherein the non-zero tone values are located at one or more indices of the STF that are a separated by a multiple of at least four;determining a first correlation between the STF and the STF shifted by a first shift length;determining a second correlation between the STF and the STF shifted by a second shift length;determining a fast Fourier transform (FFT) size based on the first correlation and the second correlation; anddecoding one or more data symbols based at least in part on the determined FFT size.2. The method of claim 1 , wherein the first shift length is double the second shift length.3. The method of claim 1 , wherein the first shift length corresponds to a periodicity of a short training symbol for a 32-point FFT STF.4. The method of claim 3 , wherein the first shift length is one fourth of the ...

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Номер записи: 97

22-08-2013 дата публикации

Dual-Stream Signal (SIG) Field Encoding with Higher Order Modulation

Номер: US20130216002A1

Автор: Aboul-Magd Osama, Shum Au Kwok, Suh Junghoon

Принадлежит: Futurewei Technologies, Inc.

Signal (SIF) field capacity can be significantly increased by encoding SIG field data using two streams in accordance with a space-time block code (STBC) encoding scheme. Dual-stream SIG field encoding allows for the utilization of higher order modulation schemes, such as quadrature phase-shift keying (QPSK), which increases SIG field capacity. Dual-stream encoded SIG fields are transmitted using an omnidirectional beam to allow mobile stations to accurately decode the SIG field irrespective of their spatial location. 1. A method for communicating in a wireless network , the method comprising:encoding signal (SIG) field data in accordance with a space-time block code (STBC) encoding scheme to obtain an encoded SIG field; andtransmitting the encoded SIG field in a preamble of a frame.2. The method of claim 1 , wherein transmitting the encoded SIG field in the preamble of a frame comprises:transmitting the encoded SIG field using an omnidirectional beam.3. The method of claim 1 , wherein encoding the SIG field data in accordance with the STBC encoding scheme comprises encoding the SIG fields data using two transmit streams.4. The method of claim 3 , further comprising:transmitting two long training fields (LTFs) in the preamble of the frame, the two LTFs being positioned before the encoded SIG field, wherein the two LTFs provide channel estimation for the two transmit streams.5. An apparatus for transmitting data claim 3 , the apparatus comprising:a processor; and encode signal (SIG) field data in accordance with a space-time block code (STBC) encoding scheme to obtain an encoded SIG field; and', 'transmit the encoded SIG field in a preamble of a frame., 'a computer readable storage medium storing programming for execution by the processor, the programming including instructions to6. A method for communicating in a wireless network claim 3 , the method comprising:generating, by a communications device, a signal (SIG) field using two transmit streams; andtransmitting ...

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Номер записи: 98

29-08-2013 дата публикации

Method and apparatus for generating, transmitting, and receiving a data frame in a wireless communication system

Номер: US20130223349A1

Автор: Jaewoo Park, Jeeyon Choi, Sok-Kyu Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

The present invention relates to a technique relating to a method and apparatus for generating, transmitting, and receiving a data frame having a newly proposed format in a wireless communication system. According to the technique, the method for generating a data frame in a wireless communication system comprises the following steps: generating at least one first subframe; generating at least one second subframe; and generating a data frame including the first and second subframes, wherein the first and second subframes include length information of a MAC protocol data unit (MPDU) contained in the first and second subframes, and the length information of the MPDU contained in the second subframe is zero.

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Номер записи: 99

29-08-2013 дата публикации

Method and apparatus for sequence hopping in single carrier frequency division multiple access (sc-fdma) communication systems

Номер: US20130223389A1

Автор: Aris Papasakellariou, Joon-Young Cho

Принадлежит: SAMSUNG ELECTRONICS CO LTD

Methods and apparatus are provided for transmitting a reference-signal and a data signal by a user equipment in a communication system. The data signal is generated. A sequence is determined for the reference-signal. The reference-signal is transmitted based on the sequence and the data signal through at least one resource block. The sequence is determined based on sequence-hopping if the number of resource blocks is equal to or greater than the predetermined value. The sequence is determined without sequence-hopping if the number of resource blocks is less than a predetermined value.

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Номер записи: 100