Abstract:
PURPOSE: An interference alignment method for time-varying multiuser MIMO interference channels is provided to sequentially generate beamforming matrices of a terminal by using given dummy beamforming matrices. CONSTITUTION: A second transmission unit receives a first arbitrary dummy beamforming matrix and channel information between a first reception unit and the second transmission unit from the first reception unit and generates a second transmission beamforming matrix (S303). A third transmission unit receives the first arbitrary dummy beamforming matrix and channel information between the first reception unit and the third transmission unit from the first reception unit and generates a third transmission beamforming matrix. A first transmission unit receives a second dummy beamforming matrix and channel information between a second reception unit and the first transmission unit from the second reception unit and generates a first transmission beamforming matrix (307). [Reference numerals] (AA) Start; (BB) End; (S301) First reception unit produces a promised arbitrary dummy beamforming matrix; (S302) Second and third transmission units receive information about a channel from the first reception unit; (S303) Second and third transmission units form a transmission beamforming matrix according to the received information; (S304) Second reception unit receives the channel information from the third transmission unit; (S305) Second reception unit produces a dummy beamforming matrix according to the received information; (S306) First transmission unit receives the channel information from the second reception unit; (S307) First transmission unit produces a transmission beamforming matrix according to the received information; (S308) Each transmission unit normalizes the transmission matrixes; (S309) First and second reception units produce a reception beamforming matrix meeting the dummy matrixes at right angles; (S310) Third reception unit produces a reception beamforming matrix minimizing interference
Abstract:
PURPOSE: A method and an apparatus for coding and decoding a distribution source by using a low density parity check code are provided to improve an average compression rate, reduce a decoding complexity, and minimize a decoding delay time. CONSTITUTION: A decoding unit(1710) decodes coded second data. A syndrome recovery unit(1720) recovers first data based on the decoded second data or a parity check matrix of a low density parity check code which corresponds to a compression syndrome of first data. The syndrome recovery unit reflects the compression syndrome of the first data in a check node, reflects the second data which is decoded in a variable node, and performs a repetitive decoding in the predetermined number of times based on the parity check matrix which corresponds to the reflected check node, the variable node, and the compression syndrome of the first data. A source open recovery unit(1730) recovers the first data based on at least one specific bit in case the recovery of the first data fails. [Reference numerals] (1700) Distribution source decoding unit; (1710) Second information decoding unit; (1720) First information syndrome recovery unit; (1730) Source open recovery unit; (1732) Communication unit
Abstract:
복호 순서 제어장치는 수신 신호의 채널 행렬과 프리코딩 행렬을 곱셈한 결과로부터 각 레이어(Layer) 별로 유효 SNR을 산출하는 유효 SNR 산출부, 각 레이어별로 산출된 유효 SNR을 CQI 테이블(Channel Quality Indicator)에 매핑하여 RI(Rank Indicator)를 선택하는 RI 설정부, 선택된 RI가 랭크 2일 경우, 제 1 레이어(p)의 유효 SNR에 대응되는 CQI(Channel Quality Indicator) 테이블의 부호율과 변조차수를 곱셈한 값과, 제 2 레이어(1-p)의 유효 SNR에 대응되는 CQI 테이블의 부호율과 변조차수를 곱셈한 값을 합산한 데이터 전송률을 산출하는 전송률 산출부 및 합산한 데이터 전송률을 비교하여 가장 큰 값을 가지는 레이어를 우선으로 하여 복호 순서를 결정하는 복호 순서 제어부를 포함한다.
Abstract:
본 발명은, 단말간 직접 통신을 위한 간섭 제어 방법에 있어서, 제1단말의 위치가 미리 결정된 임계 조건을 만족하는 제1지역에 포함되는 지 확인하는 과정과, 상기 제1지역에 위치함을 확인한 경우, 상기 제1단말이 상기 직접 통신의 대상 단말을 탐색하는 신호의 가용 자원 중 상기 제1지역의 전용 자원을 구성하는 일부 자원을 상기 신호의 자원으로 결정하는 과정을 포함한다.
Abstract:
The present invention relates to a link scheduling method of a transmission node and an interference information reporting method of a reception node in a wireless communication system which directly communicates between the transmission node and the reception node. The link scheduling method of the transmission node according to the present invention includes the steps of: receiving the interference information of one or more reception nodes by one or more transmission nodes from one or more reception nodes; performing link scheduling based on the interference information; and transmitting data according to the link scheduling result. [Reference numerals] (a) Transmission node in which there is data to be transferred: scheduling according to an interference matrix; (AA) Scheduling links in which use the interference matrix; (b) Interference matrix after calculating the scheduling; (BB) Desired signal; (CC) Interference signal; (DD) Scheduled link; (EE) Yielded link; (FF) B_INTF [nth traffic section] =; (GG) Except from a nth traffic section; (HH) Use in the nth traffic section