CAJ | 학술논문

在 V-BLAST结构的分布式多输入多输出(MIMO)系统中，针对发射天线地域分布所引起的发射符号异步到达接收天线的问题，给出了一种分布式 MIMO 系统的信号发射与检测方法。在慢衰落信道中，该方法利用接收端反馈的信道状态信息，采用几何平均分解(GMD)构建等对角的上三角矩阵，消除子信道间增益的不平衡。在莱斯衰落信道下的计算机仿真表明，与已有 QR分解的分层算法相比，该检测方法能够显著提升系统的误码性能。
재 V-BLAST결구적분포식다수입다수출(MIMO)계통중，침대발사천선지역분포소인기적발사부호이보도체접수천선적문제，급출료일충분포식 MIMO 계통적신호발사여검측방법。재만쇠락신도중，해방법이용접수단반궤적신도상태신식，채용궤하평균분해(GMD)구건등대각적상삼각구진，소제자신도간증익적불평형。재래사쇠락신도하적계산궤방진표명，여이유 QR분해적분층산법상비，해검측방법능구현저제승계통적오마성능。
Aiming at the problem of the asynchronous arrival at receiving antennas caused by the distributed location of transmit antennas, a transmission and detection technique is presented for distributed Multiple Input Multiple Output(MIMO) system with V-BLAST(Vertical Bell Labs Layered Space Time) architecture. In slowly fading channel, an equal diagonal upper triangular channel is constructed based on the Geometric Mean Decomposition(GMD) method by making use of the feedback channel state information to eliminate the imbalance among subchannel gains. The simulation results under Ricean fading conditions show that, compared with QR decomposition algorithm, the proposed detection technique can improve the BER performance remarkably.