33 results about "Interleave division multiple access" patented technology

A wireless communication device, a wireless communication method, and a program capable of contributing to improvement of wireless communication technology related to IDMA. The wireless communication device includes: a wireless communication unit that performs wireless communication using interleave division multiple access (IDMA) with another wireless communication device; and a controller that controls an interleave length in an interleave process for IDMA by the wireless communication unit.

The invention discloses an iterative carrier synchronizing method based on code-by-code iterative detection. The method comprises the following steps of: reconstructing external information generated during the code-by-code iterative detection of interleave-division multiple-access (IDMA) to acquire a reconstructed signal; performing frequency offset estimation according to a received signal during the current iterative detection of the IDMA and the reconstructed signal acquired during the last iterative detection to acquire a current frequency offset estimated value; and compensating a frequency offset generated during the current iterative detection by using the current frequency offset estimated value. Correspondingly, the invention discloses an orthogonal frequency division multiplexing (OFDM)-IDMA carrier synchronizing system based on the code-by-code iterative detection. By combining a multi-user detection mechanism of the OFDM-IDMA system with a frequency offset signal processing method technology, the estimation and the compensation is performed cyclically through an iteration mode, so that the frequency offset estimation precision is improved and the performance of a link of the system is optimized; therefore, the performance of the system subjected to the carrier frequency offset interference is made to gradually approximate to the performance of the system free of the frequency offset, and the carrier synchronization of the system is realized.

The invention relates to a BRadio (Broadband Radio) wireless access system and a signal transmission, networking and service method, which belong to the technical field of broadband radio communication. The system is a broadband radio access system based on a BRadio technology and comprises a downlink link and an uplink link, wherein a TFU-OFDMA (Time domain and Frequency domain United Orthogonal Frequency Division Multiple Access) technology is adopted by the downlink link of the system while a TFU-SCMA (Time domain and Frequency domain United-Single Carrier Multiple Access) technology is adopted by the uplink link. The method comprises a time division duplex or frequency division duplex signal transmission method adopted by the downlink link and the uplink link, a networking method for reducing interference between cells by adopting an interleave division multiple access technology and a service method adopting a content and channel sharing based personal media service technology. The BRadio system in the invention supports multiple encoding methods and supports TDD (Time Division Duplex) or FDD (Frequency Division Duplex), can very flexibly configure radio resources, supports various channel environments and various multimedia and stream media services and supports wide-area coverage under high speed mobile environments. The system can be applied to fields like e-government affairs, e-commerce, mobile office and tourist recreation.

The invention provides a transform domain communication system (Transform Domain Communication System, TDCS) multiple access method based on interleave multiple access (Interleave-Division Multiple Access) so as to improve the multiple access capability. According to the method, based on a traditional bipolar modulation conversion domain communication system, bipolar modulation is carried out on the transmitted data by using a basic modulation waveform at a transmitting end; and then, the data of each user enters a unique code chip-level interleaver for interleaving; the interleaved data are subjected to fourier inverse transformation to generate a sending signal; at a receiving end, the received signals are demodulated and judged according to a traditional IDMA demodulation method. According to the method in the invention, the concept and architecture of interleaving multiple access are introduced; the multiple access capability can be effectively improved on the premise that the advantages of the TDCS system are kept.

The invention discloses a hybrid multiple access system for a long term evolution (LTE) link. The hybrid multiple access system is characterized in that: in an orthogonal frequency division multiplexing (OFDM)-interleave-division multiple-access (IDMA) hybrid multiple access technical system combining an OFDM multicarrier technology and an IDMA multiple access technology, single carrier frequency division multiple access (SC-FDMA) is adopted and combined with IDMA to form an SC-FDMA-IDMA technology instead of an OFDM transmission technology, and exactly, a discrete Fourier transform (DFT) module is arranged at a transmitter of the OFDM-IDMA system, an inverse discrete Fourier transform (IDFT) module is arranged at a receiver, transmitter user data is sequentially subjected to IDMA modulation and SC-FDMA modulation and then transmitted by a wireless channel, and the receiver sequentially performs SC-FDMA demodulation and IDMA demodulation. The hybrid multiple access system ensures a relatively lower peak-to-average power ratio (PAPR), and is applied to the uplink communication of wireless communication.

Provided is a communication control apparatus including a communication unit configured to perform communication with a radio communication apparatus of a communication system in which interleave division multiple access (IDMA) is used, and an interval control unit configured to dynamically change an interval of allocation of an interleaver used for IDMA by the radio communication apparatus.

The invention belongs to the technical field of wireless communication, and specifically relates to a multi-user detection method combining approximate message passing for an interleave-division multiple access system. As an orthogonal frequency division multiplexing based on interleave-division multiple access (OFDM-IDMA) system is affected by multiple frequency offsets caused by the Doppler shift or different accuracy of a crystal oscillator of a transceiving end, but the traditional frequency offset suppression method in an orthogonal frequency division multiplexing (OFDM) system cannot adapt to the OFDM-IDMA system, therefore a multi-frequency-offset suppression method in theOFDM-IDMA system needs to be researched. The method of the invention is to adopt an approximate message passing(AMP) frequency offset detection algorithm to suppress frequency offset on the OFDM-IDMA system. By adoption of the detection method provided by the invention, the performance of the system is restored to be very close to that in the case of no frequency offset after the frequency offset compensation detection is performed.

The invention provides an IDMA bus bridge device which is used for performing reading-writing operation to a slave device supporting an IDMA interface by at least one primary device supporting a non-IDMA interface, wherein an IDMA signal generator is provided between the non-IDMA interface and the IDMA interface; the IDMA signal generator is provided with a control / state, address, write data and read data register; wherein, the reading / writing requirement position, the state position of the IDMA signal generator and the response position of the slave device are defined in the control / state register; the state position represents that the IDMA signal generator is in the current state of the performing process; the IDMA signal generator produces corresponding action at each state; the corresponding relationship among various states, different transfer conditions and the action of the IDMA signal generator at each state is defined; the primary device reads and writes four registers according to the defined state transfer order so as to complete the reading-writing operation of the slave device. According to the IDMA bus bridge device, the operation order of the primary device for four registers is improved to shorten the conversion period and improve operation efficiency.

The invention provides a multi-user two-way relay communication method based on an interleave-division multiple-access technology, and belongs to the technical field of wireless communication. The multi-user two-way relay communication method comprises the steps that different interleavers are used for differentiate different user pairs, a user pair information sequence after interleave is sent to a relay node, the relay node conducts iterative multi-user detection decoding on the received information sequence and then conducts XOR operation on the information sequence obtained after user pair decoding, and an intermediate value is obtained; the intermediate value obtained after the XOR operation is broadcast to a user pair, two users of the user pair receive the intermediate value and conduct XOR operation according to information sequences of the users and the intermediate value, so that an information sequence of the opposite side which is in communication with each user is obtained, and the whole communication process is finished. Through the multi-user two-way relay communication method based on the interleave-division multiple-access technology, maximized encoding gain and maximized channel capacity can be obtained, multi-access interference and multi-user interference can be effectively eliminated through an iterative multi-user detection algorithm, and the error rate resistance of a system is improved.

The invention relates to a multi-user two-way relay communication method based on an interleave-division multiple-access (IDMA) technology, belonging to the technical field of wireless communications. The method comprises two stages: at the first stage: using different interleavers to distinguish different user pairs; sending information sequences of the interleaved user pairs to relay nodes; carrying out iterative multi-user detection decoding on the received information sequences by the relay nodes; and carrying out an XOR operation on the information sequences obtained by decoding the user pairs to obtain an intermediate value; and at the second stage: broadcasting the intermediate value obtained by the XOR operation to the user pairs; and after two users receive the intermediate value, utilizing the own information sequences of the two users and the intermediate value to carry out an XOR operation so as to obtain user information sequences of the other user which is communicated with one user, thus finishing the whole communication process. The method has maximum coding gains and channel capacity, is used to eliminate multi-access interference and multi-user interference by an iterative multi-user detection algorithm, and is used to acquire remarkable performance gains and the like.

The invention belongs to the technical field anti-interference of communication, relates to Spatial Modulation (SM), Interleave-division Multiple Access (IDMA), Superposition Coded Modulation (SCM) and Sphere Decoding, and related Multiple Input Multiple Output (MIMO) technologies, and provides a frequency offset inhibition method based on an SCM-SM system. A reception signal is compensated by compensating an optimal compensation value, an index of an emission antenna is estimated roughly via IMRC to compensate the signal accurately, the index of the emission antenna is estimated accurately after spherical decoding to update the frequency offset value, and the BER performance of the system is improved substantially.

The invention provides a data processing method for an interleave division multiple-access (IDMA) transmitter system, an interleave division multiplexing transmitter and a transmitter. The IDMA transmitter system mainly comprises a plurality of transmitters, each of which comprises inserted prefix units and interleavers; each transmitter is identified according to the difference of the interleavers; no IFFT unit with a same mapping mode is arranged between the interleaver and the inserted prefix unit of each transmitter. By utilizing the method of the invention, the complexity of the IDMA system is effectively reduced and the system has the advantages of comparatively low peak-to-average ratio and the insensitivity to frequency deviation, etc.

The invention discloses a communication method for an interleave division multiple access (IDMA) system with a time frequency interleaving function, which aims at the problems that an interleaver of the conventional IDMA system only interleaves at a frequency domain and has a low resource utilization ratio. A step of time frequency interleaving (14) is added after the step of frequency domain interleaving (3) during transmission; and correspondingly, a step of time frequency deinterleaving (15) is added after the step of FFT (11) during reception. By processing data matrix in the step of timefrequency interleaving (14) and the step of time frequency deinterleaving (15), the time domain resource is effectively utilized and the bit error rate of the IDMA system is obviously improved on thepremise of not increasing the operating complexity.

The invention belongs to the field of wireless communication technology, and specifically relates to a frequency offset detection method based on an interleave-division multiple access technology. Anorthogonal frequency division multiplexing-interleave-division multiple access (OFDM-IDMA) system will be affected by multiple frequency offsets caused by Doppler shift or different crystal oscillation precision of receiving and transmitting ends, and the conventional frequency offset suppression method for an orthogonal frequency division multiplexing (OFDM) system is not suitable for the OFDM-IDMA system, so a multi-frequency offset suppression method for the OFDM-IDMA system is required to be researched. The method suppresses frequency offsets by using a coordinate descent method (CDM) frequency offset detection algorithm based on the OFDM-IDMA system. After the frequency offset detection, the frequency is improved.

[Object] To provide a communication control apparatus, a radio communication apparatus, a communication control method, a radio communication method, and a program that are capable of contributing to improving a radio communication technology related to IDMA. [Solution] Provided is a communication control apparatus including: a communication unit configured to communicate with a radio communication apparatus of a radio communication system using interleave division multiple access (IDMA); and a control unit configured to allocate an interleaver type of an interleaver to be used for IDMA by the radio communication apparatus.

In order provide a communication control apparatus, a radio communication apparatus, a communication control method, a radio communication method, and a program that are capable of contributing to improving a radio communication technology related to IDMA, a communication control apparatus is provided. The communication control apparatus includes a communication unit configured to communicate with a radio communication apparatus of a radio communication system using interleave division multiple access (IDMA); and a control unit configured to allocate an interleaver type of an interleaver to be used for IDMA by the radio communication apparatus.

The present disclosure provides electronic device and method for interleaved multiple access communication. An electronic device for an interleaved multiple access control terminal comprises a processing circuit, which is configured to acquire information about interleaved multiple access communication between a receiving apparatus and a transmitting apparatus; determine configuration parameters for the transmitting apparatus based on the information, the configuration parameters comprising operation parameters of an interleaver of the transmitting apparatus, the interleaver being used to distinguish the transmitting apparatus from other transmitting apparatus; and provide the determined configuration parameters to the transmitting apparatus, so that the transmitting apparatus is configured with the transmitting parameters for communicating with the receiving apparatus.

The invention discloses a sparse interleave division multiple access method and belongs to the technical field of non-orthogonal division multiple access mobile communication. The method comprises the steps of assuming that totally K resource particles and T time frequency symbols are occupied when all access users transmit data blocks; carrying out channel coding on data block information transmitted by each user; segmenting the coded data into a plurality of sub-bit streams and mapping the sub-bit streams into codon vectors; carrying out zero padding on each codon vector to obtain a K-dimension sparse codon vector; obtaining a K-dimension sparse sending codon vector according to a sparse time frequency interleaver; at each moment, transmitting a corresponding component in the sending codon vector by each user according to a transmission resource provided by a system; estimating active users and channel gains by a receiver and obtaining sparse time frequency interleaver information of the active users; and decoding to obtain the sent data block of each access user by the receiver. According to the method, when each user accesses transmission, only a small part of total time frequency resources is occupied, and the multi-user detection complexity of the receiver in a large-scale access scene is reduced.

The invention belongs to the technical field of wireless communication, and specifically relates to a multi-user detection method combining approximate message passing for an interleave-division multiple access system. As an orthogonal frequency division multiplexing based on interleave-division multiple access (OFDM-IDMA) system is affected by multiple frequency offsets caused by the Doppler shift or different accuracy of a crystal oscillator of a transceiving end, but the traditional frequency offset suppression method in an orthogonal frequency division multiplexing (OFDM) system cannot adapt to the OFDM-IDMA system, therefore a multi-frequency-offset suppression method in theOFDM-IDMA system needs to be researched. The method of the invention is to adopt an approximate message passing(AMP) frequency offset detection algorithm to suppress frequency offset on the OFDM-IDMA system. By adoption of the detection method provided by the invention, the performance of the system is restored to be very close to that in the case of no frequency offset after the frequency offset compensation detection is performed.

Provided is a communication control apparatus including a communication unit configured to perform communication with a radio communication apparatus of a communication system in which interleave division multiple access (IDMA) is used, and an interval control unit configured to dynamically change an interval of allocation of an interleaver used for IDMA by the radio communication apparatus.

The invention belongs to the technical field of wireless communication, in particular to an iterative inter-cell interference suppression method and device based on optimal Bayesian. The method and the device employ an OFDM (Orthogonal Frequency Division Multiplexing) signal transmission and receiving system model based on IDMA (Interleave-Division Multiple Access), signals are interleaved and modulated by an interleaver in a transmitter and then transmitted, prior information of the received signals are updated by an optimal Bayesian detection algorithm via an MUD (master user directory) and DEC (data exchange control) decoder in a receiver, the interference reduced, and soft demodulation of the signals is achieved. The device comprises an iterative inter-cell interference suppression transmitter and a receiver based on the optimal Bayesian. The method and the device can improve interference resistance of users at the edge of a cell in a heavier load system.

The invention discloses a hybrid multiple access system for a long term evolution (LTE) link. The hybrid multiple access system is characterized in that: in an orthogonal frequency division multiplexing (OFDM)-interleave-division multiple-access (IDMA) hybrid multiple access technical system combining an OFDM multicarrier technology and an IDMA multiple access technology, single carrier frequency division multiple access (SC-FDMA) is adopted and combined with IDMA to form an SC-FDMA-IDMA technology instead of an OFDM transmission technology, and exactly, a discrete Fourier transform (DFT) module is arranged at a transmitter of the OFDM-IDMA system, an inverse discrete Fourier transform (IDFT) module is arranged at a receiver, transmitter user data is sequentially subjected to IDMA modulation and SC-FDMA modulation and then transmitted by a wireless channel, and the receiver sequentially performs SC-FDMA demodulation and IDMA demodulation. The hybrid multiple access system ensures a relatively lower peak-to-average power ratio (PAPR), and is applied to the uplink communication of wireless communication.

The invention discloses a communication method for an interleave division multiple access (IDMA) system with a time frequency interleaving function, which aims at the problems that an interleaver of the conventional IDMA system only interleaves at a frequency domain and has a low resource utilization ratio. A step of time frequency interleaving (14) is added after the step of frequency domain interleaving (3) during transmission; and correspondingly, a step of time frequency deinterleaving (15) is added after the step of FFT (11) during reception. By processing data matrix in the step of timefrequency interleaving (14) and the step of time frequency deinterleaving (15), the time domain resource is effectively utilized and the bit error rate of the IDMA system is obviously improved on thepremise of not increasing the operating complexity.

The present disclosure provides electronic device and method for interleaved multiple access communication. An electronic device for an interleaved multiple access control terminal comprises a processing circuit, which is configured to acquire information about interleaved multiple access communication between a receiving apparatus and a transmitting apparatus; determine configuration parameters for the transmitting apparatus based on the information, the configuration parameters comprising operation parameters of an interleaver of the transmitting apparatus, the interleaver being used to distinguish the transmitting apparatus from other transmitting apparatus; and provide the determined configuration parameters to the transmitting apparatus, so that the transmitting apparatus is configured with the transmitting parameters for communicating with the receiving apparatus.

The invention provides an IDMA bus bridge device which is used for performing reading-writing operation to a slave device supporting an IDMA interface by at least one primary device supporting a non-IDMA interface, wherein an IDMA signal generator is provided between the non-IDMA interface and the IDMA interface; the IDMA signal generator is provided with a control / state, address, write data and read data register; wherein, the reading / writing requirement position, the state position of the IDMA signal generator and the response position of the slave device are defined in the control / state register; the state position represents that the IDMA signal generator is in the current state of the performing process; the IDMA signal generator produces corresponding action at each state; the corresponding relationship among various states, different transfer conditions and the action of the IDMA signal generator at each state is defined; the primary device reads and writes four registers according to the defined state transfer order so as to complete the reading-writing operation of the slave device. According to the IDMA bus bridge device, the operation order of the primary device for four registers is improved to shorten the conversion period and improve operation efficiency.

The invention provides a cell same-frequency networking system combining an interleave division multiple access (IDMA) and an overlapped code division multiple access (OVCDMA) and a method thereof, belonging to the wireless communication network technical field. The system consists of a transmitting end and a receiving end. In the invention, neighboring cells are distinguished by means of orthogonality of an OvCDMA code word, and the homochromatic cells using the same OvCDMA code word are distinguished by an IDMA technology so as to eliminate homochromatic interference; and each cell can obtain the unique OvCDMA+IDMA cell exclusive code word, and the receiving end gives full play to the advantages of the IDMA and the OvCDMA by an iterative detection technology to eliminate the interference among the cells. In the invention, the interference between the neighboring cells is processed by the OvCDMA code word, thus achieving the purposes of eliminating the interference between the neighboring cells and simplifying the complexity of the OvCDMA technology; and the IDMA technology can help eliminate the interference among the homochromatic cells identified by the same OvCDMA code word and meet the networking demand of the homochromatic cells in larger quantity by means of the characteristics of rich multi-access resources of the IDMA technology.

The invention provides a cell same-frequency networking system combining an interleave division multiple access (IDMA) and an overlapped code division multiple access (OVCDMA) and a method thereof, belonging to the wireless communication network technical field. The system consists of a transmitting end and a receiving end. In the invention, neighboring cells are distinguished by means of orthogonality of an OvCDMA code word, and the homochromatic cells using the same OvCDMA code word are distinguished by an IDMA technology so as to eliminate homochromatic interference; and each cell can obtain the unique OvCDMA+IDMA cell exclusive code word, and the receiving end gives full play to the advantages of the IDMA and the OvCDMA by an iterative detection technology to eliminate the interference among the cells. In the invention, the interference between the neighboring cells is processed by the OvCDMA code word, thus achieving the purposes of eliminating the interference between the neighboring cells and simplifying the complexity of the OvCDMA technology; and the IDMA technology can help eliminate the interference among the homochromatic cells identified by the same OvCDMA code word and meet the networking demand of the homochromatic cells in larger quantity by means of the characteristics of rich multi-access resources of the IDMA technology.

There is provided an apparatus including: an acquisition unit configured to acquire an information block generated from transmission data for a user and subjected to error correction coding; and an interleaving unit configured to interleave a bit sequence of the information block using an interleaver unique to the user. The interleaving unit interleaves the bit sequence by interleaving each of two or more partial sequences obtained from the bit sequence.