Sending terminal, receiving terminal directly realizing spread-spectrum ultra-wideband and method thereof

The invention relates to a sending terminal for implementing DS-UWB. The invention comprises: an encoder for decoding data frames to send, a spread spectrum modulator capable of performing PN sequence spectrum spreading and BPSK modulating to the data outputted by the decoder, a waveshaper capable of performing wave shaping to the data outputted by the spread spectrum modulator to get digital baseband waveshape, a digital-to-analog converter capable of performing digital-to-analog conversion to the digital baseband waveshape outputted by the waveshaper to get simulative baseband waveshape, a low pass filter capable of performing low pass filtering to the simulative baseband waveshape outputted by the digital-to-analog converter; an up-converter capable of performing up conversion to the simulative baseband waveshape outputted by the low pass filter, and an RF signal emission processor capable of performing emission processing to the signal outputted by the up-converter. The sending terminal ...

Flow control method and device based on pre-distribution

The invention discloses a pre-allocation-based flow control method, which comprises the steps of: carrying out initialization, acquiring the available average band width for best-effort service of each link; setting the initial injection rate of best-effort service of each link to be the average service volume of the link; allocating the shortest path for best-effort service of all links; settingthe target injection rate of best-effort service to lead the load factors of all links to be lower than 1; and according to the target injection rate, flow control is carried out by designing networkinterfaces and changing storage and transmission methods of data in an IP nucleus send buffer. The invention also discloses a pre-allocation-based flow control device. Taking advantage of the servicepredictability of network-on-chips, the invention reduces the service suddenness, lowers the congestion possibility and improves the network-on-chip performance by restricting the injection rate of best-effort ...

Method for ensuring service quality for designing network on chip

A method for guaranteeing service quality which is used for designing a network-on-chip belongs to the field of designing network-on-chips and is characterized in that the method comprises: dividing IP block operations into service quality guarantee operations GS which is composed of delay guarantee GL and bandwidth assurance GB operations and best effort operations BE, sending the BE operations into a synthesizer after the BE operations are packed, sending the GL operations into the synthesizer through a buffer area, sending the GB operations into the buffer area and then entering into the synthesizer according to different destination addresses and bandwidth requirements, sending all operations into a router successively according to the priority, adopting a microchip numbering route mode by the GS operations, renewing microchip number into a number of a next link according to a routing table whose route preallocation results are initiated, then, sending to a corresponding buffer area ...

Service quality guarantee method for broadband radio access network media accessing control layer

This invention belongs to a classification of service quality Broad Band wireless access network technology, its characteristics is that the service is divided into five categories and increase of variable-length packet, variable bit rate, real-time services fluctuations gentle flow; The sub-stations and base stations are made a detailed functional breakdown, the business services is established by admission control module to accept or reject IP layers; reading bandwidth allocation module with a wide range of services requested bandwidth connections with the quality of service parameters and distribution system available bandwidth, different sub-stations authorized obtained the total bandwidth; using uplink and downlink scheduling of the total bandwidth in accordance with its mandate and the necessary bandwidth, by service Priority service connecting the various dispatching through lower physical layer interface to send the media access control layer of data and control information. Not ...

Matched filtering method

The invention discloses a matched filtering method in which a square wave is used as a swash response of a matched filter, and various filtering coefficients are fixed values. In the invention, the square wave is used as the swash response of the matched filter, and the filtering coefficients are fixed values, thus floating point multiplication required when the traditional matched filter selects an image of a selective forming filter can be avoided, and summation and accumulation of various items are just needed, thereby decreasing achievement difficulty of hardware; the length of the swash response of the matched filter is designed to be a sign period, if the multiple of the sampling is N, order of the filter is N or N+1 which is far smaller than the NK (K is the lasting sign period number of the swash response of the forming filter) of the traditional matched filter, thereby further reducing the achievement requirement of the hardness; and R paths are selected to carry out parallel treatment ...

Method and device for double self-following frequency prediction to restore end branch clock

The invention is suited for multiplex technique of digital communication. It provices a digitization method of restoring receive-end shunt circuit clock in reconnected system and the device. The technical characteristic is as following: obtaining insert ratio by statistics of inserted frame numbers, processing the clock according to the insert ratio, then getting the receive-end shunt circuit clock of reconnected system. The advantages are: easy to be integrated, wide seizing region, without flutter accumulation. It is used to digital microwave communication, satellite commuication and optical fiber communication extensively.

Equipment and method for analyzing network simulation

The invention discloses equipment for analyzing network simulation. The equipment is characterized by comprising an input unit, a control unit, a simulation core unit, a measuring and analyzing unit and an output unit, wherein the input unit is used for inputting visual network parameters, non-visual parameters and network flow parameters; the control unit is used for performing overall scheduling including simulation time control and simulation event control according to user input; the simulation core unit is used for generating simulation nodes based on hardware through a virtualized mechanism and adopting the nodes as network nodes during a simulation process; network data packets perform relaying and protocol-related treatment in the network nodes; the measuring and analyzing unit is used for acquiring needed parameters during the experiment process and processing the acquired parameters according to a preset manner; the output unit is used for outputting processed parameters. According ...

A self-adapted tolerance method based on learning for chip network

A self-adapting error-tolerant method which is used for on-chip network and is based on studying belongs to the field of the on-chip interconnection network. The invention is characterized in that the transmitting and receiving ends are respectively provided with a transmitting module and a receiving module. In the transmitting module, according to the known sequence which is transmitted to each path of the on-chip network by the error-tolerant method selector and the received sequence, an error probability p of each path channel and an error probability q which can not be corrected by the error correction code when error exists are calculated out. To the data inputted by the intelligent IP block, the error retransmission method and mixed fault-tolerant method is determined by firstly encoding with the error detecting code encoder and then comparing the magnitude of p and kd-kh/kd-kh*q thereby determining whether the data should be transmitted to the error detecting code encoder. The procedures ...

Parallel implementation method and device for fractional sampling rate transformation

The invention discloses a parallel implementation method for fractional sampling rate transformation, which comprises the following steps of: 1, recording a data sequence x(n) to be transformed as x(0), x(1), ..., x(D-1) by taking D paths as a group and inputting the sequence into D filtering channels with channel markers according to frequency fi/D, wherein each filtering channel comprises I subchannels; 2, for each group of data, acquiring I*D paths of data to be operated from the D filtering channels; and 3, extracting I paths of data at fixed positions from the I*D paths of data to be operated according to a first preset rule for executing convolution operation, and acquiring I paths of output data of y(0), y(1), ..., y(I-1) with the frequency of fo/I respectively, wherein fo/fi=I/D refers to the multiple of fractional sampling rate transformation, and I and D are prime numbers. The method can reduce the operating rate of the polyphase filtering-based fractional sampling rate transformation ...

Method and device for double self-following frequency prediction to restore end branch clock

Method for ensuring service quality for designing network on chip

A method for guaranteeing service quality which is used for designing a network-on-chip belongs to the field of designing network-on-chips and is characterized in that the method comprises: dividing IP block operations into service quality guarantee operations GS which is composed of delay guarantee GL and bandwidth assurance GB operations and best effort operations BE, sending the BE operations into a synthesizer after the BE operations are packed, sending the GL operations into the synthesizer through a buffer area, sending the GB operations into the buffer area and then entering into the synthesizer according to different destination addresses and bandwidth requirements, sending all operations into a router successively according to the priority, adopting a microchip numbering route mode by the GS operations, renewing microchip number into a number of a next link according to a routing table whose route preallocation results are initiated, then, sending to a corresponding buffer area ...

Single-carrier and ultra-wideband sending method and device

The invention discloses single-carrier and ultra-wideband sending method and device. A physical layer data frame structure used in the method is characterized in that a leader sequence comprises a trapping/channel estimation sequence, a frame start delimiter and a block length; a training sequence field is used for coefficient training of a self-adapting filter; the frame head comprises a physical frame head and an MAC frame head; a data field bears metadata; after scrambled, encoded and interlaced, bits of the frame heads and the data are named as information bits; the information bits are divided into N blocks; the value of each frame N can be different, and then the frames of different lengths can be transmitted. A tracking sequence is inserted into the front of each block or behind each block to perform timing tracking. The invention enhances the dissociative diffusion signal-to-noise ratio so that the trapping probability is enhanced; the channel estimation accuracy is increased, the ...

Method for capturing spread spectrums in multipath environment

The invention discloses a method for capturing spread spectrums in multipath environment, comprising the following steps of: S1, matching and filtering local code sequences and received code sequences and outputting the relevant result of a matched filtering in each sampling period; S2, merging the multipath energy according to the relevant result of the matched filtering in each sampling period to obtain the value of the merged multipath energy, outputting the value of once merged multipath energy in each code sequence period and then comparing the merged multipath energy with a first threshold, if the former is less than the latter, comparing the merged multipath energy obtained after delaying one code sequence period with the first threshold until the merged multipath energy is greaterthan the first threshold, and then executing S3; and S3, comparing the value of the merged multipath energy obtained in S2 with a preset second threshold after delaying one code sequence period, if the ...

Virtual concurrent internet architecture

The invention relates to a virtual concurrent internet system structure which is characterized in that: the structure comprises a prior IP sub-network and a detectable, controllable and manageable IP sub-network. The prior IP sub-network is the aggregate of the prior large-scale commercial internet protocols and the data plane of the prior IP sub-network retains the layered structure of the priorinternet. The detectable, controllable and manageable IP sub-network comprises a data plane, a knowledge plane, a control plane and a management plane. The data plane of the detectable, controllable and manageable IP sub-network retains the same layered structure as the prior Internet and shares the user application layer and the physical layer of the prior Internet. The two sub-networks achieve the effect of independent virtual coexistence by the virtualization techniques of the physical layer, and allow a user to independently select the desired service according to the need of the user by the ...

Self-adaptable package for designing on-chip network

The method feature the following: setting up a data source buffer area at IP block; setting up a packager and a packaging buffer area at the network interface; after system initiation, the packager is at a idle state; when the data source buffer area is not empty and the packaging buffer area is not full, the packager inserts header and tailor and body micro plate, and enters into the busy state; if the data source buffer area is not empty and the packaging buffer area is not full, and the destination address of the data is not changed, the packager inserts the body micro plate; if the destination address in the data buffer source area is changed or the data source buffered area and the packaging buffer area both are empty, the packager inserts the body micro plate and enters into idle state.

Spread spectrum acquisition method and receiving terminal for realization thereof

The invention relates to a spread spectrum acquisition method. The method comprises the following steps: firstly, a receiving terminal uses a current phase as a reference phase, and carries out m-channel parallel correlation processing on spread spectrum sequence in received data frames to obtain m-channel correlation values; then calculates an L1 norm mean of the m-channel correlation values; andfinally judges whether the mean is larger than a preset threshold, and if yes, false alarm removal processing is carried out to confirm whether the acquisition is successful, otherwise, the steps arerepeated after a local correlative template slides m phases relative to the spread spectrum sequence. The invention further relates to a receiving terminal corresponding to the method. The spread spectrum acquisition method can be operated in an environment with a low signal to noise ratio without increasing the length of spreading codes; can help acquire a certain path which almost arrives at the earliest ...

Opportunity sharing-based wireless virtual resource allocation method

The invention relates to the technical field of mobile and wireless networks, and provides an opportunity sharing-based wireless virtual resource allocation method. The method comprises the following steps: determining the total quantity of resources in a physical network; determining the quantity of virtual networks and the resource demands including baseline demands, elastic demands and the probabilities of the elastic demands of each virtual network; determining a price needing to be paid by each virtual network, wherein the price is a concave function relating to the resource demands; setting constraint conditions including conditions that the total quantity of resources allocated by the virtual networks does not surpass the total quantity of resources in the networks, one resource is occupied by one baseline demand at most, and the conflict probability under the condition that the elastic demands of different virtual networks occupy the same resource does not surpass a preset conflict ...

Flow control method and device based on pre-distribution

The invention discloses a pre-allocation-based flow control method, which comprises the steps of: carrying out initialization, acquiring the available average band width for best-effort service of each link; setting the initial injection rate of best-effort service of each link to be the average service volume of the link; allocating the shortest path for best-effort service of all links; setting the target injection rate of best-effort service to lead the load factors of all links to be lower than 1; and according to the target injection rate, flow control is carried out by designing network interfaces and changing storage and transmission methods of data in an IP nucleus send buffer. The invention also discloses a pre-allocation-based flow control device. Taking advantage of the service predictability of network-on-chips, the invention reduces the service suddenness, lowers the congestion possibility and improves the network-on-chip performance by restricting the injection rate of best-effort ...

Programmable router and routing method based on bit granularity

The invention provides a programmable virtual router and a routing method. The programmable virtual router comprises a programmable hardware board card, a PCI/PCI-E bus and a host computer, wherein the hardware board card is connected with the host computer through the bus; a data plane structure with programmable bit granularity is achieved through the programmable hardware board card; the data plane structure supports the extraction of arbitrary bit in a data packet, and supports the combination of arbitrary bit length of boundary part across the bus length, so that arbitrary domain in the data packet can be extracted and combined; parallel running of virtual router samples is achieved though the design of multi-pipelining; the host computer is used for achieving a virtual control plane, and the virtual control plane can be dynamically connected with the virtual routers in the programmable hardware board card to form a mapping relation. According to the invention, the data plane and online ...

Mobile management method used for mobile IP network

The invention relates to a mobile management method applying to a mobile IP network comprising the following steps: 1) establishing a mobile management system including a mobile terminal, a communication node and an I-HSIP location server; 2) registering to the I-HSIP location server by the mobile terminal through a register message after the mobile terminal enters the mobile IP network; 3) initiating a session to the communication node by the mobile terminal after the register; 4) applying the mobile switching function by the mobile terminal when the mobile terminal shifts from a mobile IP network to an adjacent another mobile IP network, thereby guaranteeing the session unbroken; 5) calling a session migration function in the SIP server by the mobile management system when the mobile management system detects the session migration function, and switching the session from one mobile terminal to another mobile terminal. The mobile management method of the invention synthetically applies ...

An irregular topology structure generation method for chip network

An irregular topology generating method for a network-on-chip is disclosed, belonging the design field of the Internet-on-chip, characterized in that the method comprises the following steps of: dividing nodes in a communication diagram that describes the application of the network-on-chip into a plurality of sets; forming new nodes by using an edge router to connect all the nodes in each set, in order to form the new directional communication diagram; performing integrated division to the new directional communication diagram until a new set is unable to form or the number of the nodes is less than or equal to 5; then determining the number of core network routers and generating the core network according to the number of the nodes in the finally-formed communication diagram; simplifying the network by reducing the redundant edge routers. The invention has the characteristics of small area and low consumption in communication power on condition of meeting the communication demands of specific ...

Spread spectrum capturing method based on maximum likelihood estimation

The invention discloses a spread spectrum capturing method based on maximum likelihood estimation, which includes that: S1, local M-path local code sequence has related computation with receiving code sequence in M sampling cycles to obtain a decision quantity according to the computation results; the decision quantity is compared with a first threshold, if the decision quantity is smaller than the first threshold, the phase of the local code sequence is adjusted, and then the local code sequence has related computation with the receiving code sequence until the decision quantity is larger than the first threshold; S2, 0 is assigned to the overall maximum related value, the phase of the local M-path code sequence is updated and the local M-path code sequence has related computation with the receiving code sequence to obtain a new decision quantity according to M computation results; if the new decision quantity is larger than the current overall maximum related value, the value of thenew ...

A self-adapted tolerance method based on learning for chip network

A self-adapting error-tolerant method which is used for on-chip network and is based on studying belongs to the field of the on-chip interconnection network. The invention is characterized in that the transmitting and receiving ends are respectively provided with a transmitting module and a receiving module. In the transmitting module, according to the known sequence which is transmitted to each path of the on-chip network by the error-tolerant method selector and the received sequence, an error probability p of each path channel and an error probability q which can not be corrected by the error correction code when error exists are calculated out. To the data inputted by the intelligent IP block, the error retransmission method and mixed fault-tolerant method is determined by firstly encoding with the error detecting code encoder and then comparing the magnitude of p and kd-kh/kd-kh*q thereby determining whether the data should be transmitted to the error detecting code encoder. The procedures ...

Spread spectrum acquisition method and receiving terminal for realization thereof

The invention relates to a spread spectrum acquisition method. The method comprises the following steps: firstly, a receiving terminal uses a current phase as a reference phase, and carries out m-channel parallel correlation processing on spread spectrum sequence in received data frames to obtain m-channel correlation values; then calculates an L1 norm mean of the m-channel correlation values; and finally judges whether the mean is larger than a preset threshold, and if yes, false alarm removal processing is carried out to confirm whether the acquisition is successful, otherwise, the steps are repeated after a local correlative template slides m phases relative to the spread spectrum sequence. The invention further relates to a receiving terminal corresponding to the method. The spread spectrum acquisition method can be operated in an environment with a low signal to noise ratio without increasing the length of spreading codes; can help acquire a certain path which almost arrives at the ...

Single-carrier and ultra-wideband sending method and device

The invention discloses single-carrier and ultra-wideband sending method and device. A physical layer data frame structure used in the method is characterized in that a leader sequence comprises a trapping/channel estimation sequence, a frame start delimiter and a block length; a training sequence field is used for coefficient training of a self-adapting filter; the frame head comprises a physical frame head and an MAC frame head; a data field bears metadata; after scrambled, encoded and interlaced, bits of the frame heads and the data are named as information bits; the information bits are divided into N blocks; the value of each frame N can be different, and then the frames of different lengths can be transmitted. A tracking sequence is inserted into the front of each block or behind each block to perform timing tracking. The invention enhances the dissociative diffusion signal-to-noise ratio so that the trapping probability is enhanced; the channel estimation accuracy is increased,the ...

Virtual concurrent internet architecture

The invention relates to a virtual concurrent internet system structure which is characterized in that: the structure comprises a prior IP sub-network and a detectable, controllable and manageable IP sub-network. The prior IP sub-network is the aggregate of the prior large-scale commercial internet protocols and the data plane of the prior IP sub-network retains the layered structure of the prior internet. The detectable, controllable and manageable IP sub-network comprises a data plane, a knowledge plane, a control plane and a management plane. The data plane of the detectable, controllable and manageable IP sub-network retains the same layered structure as the prior Internet and shares the user application layer and the physical layer of the prior Internet. The two sub-networks achieve the effect of independent virtual coexistence by the virtualization techniques of the physical layer, and allow a user to independently select the desired service according to the need of the user by the ...

Speculation method for link packet loss rate

The invention relates to a method for speculating link packet loss ratio on the basis of an internal monitor. The method puts the monitor in an initial logical topology tree, collects all observation data of the initial logical topology tree and then establishes the packet loss sequence of leaf nodes corresponding to each sub-tree so as to speculate the packet loss ratio of each inside link. The method of the invention has the advantages of low complexity and the packet loss ratio speculated being closer to actual packet loss ratio.

Control plane structure of virtual routing device and control method thereof

The invention discloses a control plane structure of a virtual routing device and a control method thereof, and relates to the technical field of Internet. The control plane structure comprises a host control unit and a plurality of virtual machine units, wherein the host control unit is used for realizing user interaction and management and control over a data plane and the virtual machine units, and periodically updating a routing table and an address resolution protocol (ARP) table in the data plane; and the virtual machine unit is used for realizing a routing protocol processing function and a data packet processing function, generating and updating the routing table and the ARP table in real time, and providing the routing table and the ARP table for the host control unit. The virtual routing device comprises programmable hardware and a host, wherein the programmable hardware is used for realizing a data plane function. By the structure and the method, a proper routing protocol can ...

Spread spectrum acquisition method in multi-path dense environment

The invention discloses a spread spectrum acquisition method in a multi-path dense environment. The method comprises the following steps: dividing the entire uncertain region of a spread spectrum acquisition system into a plurality of continuous energy windows and accumulating the energy in all the windows. As long as the biggest energy window is found, the first accessible path is found. In the technical scheme of the method, a first accessible path position estimation method is added on the basis of the original spread spectrum acquisition, so that the demodulation bit error rate of the spread spectrum acquisition system is minimized, and the error performance of the system is improved.

Virtual routing device and routing method thereof

The invention discloses a virtual routing device and a routing method thereof and relates to the technical field of an internet. The device disclosed by the invention comprises programmable hardware and a host, wherein the programmable hardware is used for achieving the data packet transmission function of a data plane; the host achieves the functions of a control plane and a management plane and comprises a host control unit and a virtual machine unit; the host control unit is used for initializing the programmable hardware and the virtual machine unit and periodically updating the items in the programmable hardware; and the virtual machine unit is used for achieving the functions of processing route protocols and processing data packets, generating and updating a route table and an ARP (Address Resolution Protocol) table in real time and providing the route table and the ARP table for the host control unit. In the invention, multiple parallel virtual networks can be simultaneously supported ...

Pricing-based scheduling method for wireless virtualized resources

The invention relates to the technical field of mobile and wireless networks, and provides a pricing-based scheduling method for wireless virtualized resources. The method comprises the following steps of: determining the number of physical networks and the number of resources owned by each of the physical networks; determining the number of virtual networks and the number of resources needed by each of the virtual networks; determining the price needing to be paid by each of the virtual networks for obtaining the needed number of resources, the price being the concave function of the needed number of resources; setting constraint conditions comprising that each of the virtual networks is at most born by one physical network, and the sum of the virtual network resources born in each of the physical networks does not greater than the number of resources owned by the physical network; calculating a resource scheduling mode enabling the total revenue of the physical networks to be the maximum ...

一种时序逻辑数字电路的设计方法

This invention is relative to a design method for time sequence logical digit circuit, it belongs to the digit circuit design technology field. The method first sets S kinds of states in the time sequence digit circuit and inputs M kind of conditions into the time sequence digit circuit. There are P kinds of actions in the time sequence logic digit circuit. Builds up the index table describing the translating between any two states within the S status. Builds up the index table among the status, actions and conditions. The advantages of this invention are to covert the series state machine in existing digital circuit system into parallel state machine, adapt it to the parallel technology in the digital circuit system.

Method for allocating bandwidth dynamically to design on-chip network

Mobile management method used for mobile IP network

The invention relates to a mobile management method applying to a mobile IP network comprising the following steps: 1) establishing a mobile management system including a mobile terminal, a communication node and an I-HSIP location server; 2) registering to the I-HSIP location server by the mobile terminal through a register message after the mobile terminal enters the mobile IP network; 3) initiating a session to the communication node by the mobile terminal after the register; 4) applying the mobile switching function by the mobile terminal when the mobile terminal shifts from a mobile IP network to an adjacent another mobile IP network, thereby guaranteeing the session unbroken; 5) calling a session migration function in the SIP server by the mobile management system when the mobile management system detects the session migration function, and switching the session from one mobile terminal to another mobile terminal. The mobile management method of the invention synthetically applies ...

Speculation method for link packet loss rate

The invention relates to a method for speculating link packet loss ratio on the basis of an internal monitor. The method puts the monitor in an initial logical topology tree, collects all observation data of the initial logical topology tree and then establishes the packet loss sequence of leaf nodes corresponding to each sub-tree so as to speculate the packet loss ratio of each inside link. The method of the invention has the advantages of low complexity and the packet loss ratio speculated being closer to actual packet loss ratio.

An irregular topology structure generation method for chip network

An irregular topology generating method for a network-on-chip is disclosed, belonging the design field of the Internet-on-chip, characterized in that the method comprises the following steps of: dividing nodes in a communication diagram that describes the application of the network-on-chip into a plurality of sets; forming new nodes by using an edge router to connect all the nodes in each set, inorder to form the new directional communication diagram; performing integrated division to the new directional communication diagram until a new set is unable to form or the number of the nodes is less than or equal to 5; then determining the number of core network routers and generating the core network according to the number of the nodes in the finally-formed communication diagram; simplifyingthe network by reducing the redundant edge routers. The invention has the characteristics of small area and low consumption in communication power on condition of meeting the communication demands ofspecific ...

Sending terminal, receiving terminal directly realizing spread-spectrum ultra-wideband and method thereof

The invention relates to a sending terminal for implementing DS-UWB. The invention comprises: an encoder for decoding data frames to send, a spread spectrum modulator capable of performing PN sequence spectrum spreading and BPSK modulating to the data outputted by the decoder, a waveshaper capable of performing wave shaping to the data outputted by the spread spectrum modulator to get digital baseband waveshape, a digital-to-analog converter capable of performing digital-to-analog conversion to the digital baseband waveshape outputted by the waveshaper to get simulative baseband waveshape, a low pass filter capable of performing low pass filtering to the simulative baseband waveshape outputted by the digital-to-analog converter; an up-converter capable of performing up conversion to the simulative baseband waveshape outputted by the low pass filter, and an RF signal emission processor capable of performing emission processing to the signal outputted by the up-converter. The sending terminal ...