干扰信道中一种权值可调的迭代算法  

An Iterative Algorithm with Adjustable Weight for Inference Channel

作　　者：王勤民[1,2] 张忠培[1] 常青美[2] 周长林[2] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都611731 [2]解放军信息工程大学理学院,郑州450002

出　　处：《电子与信息学报》2012年第12期2850-2854,共5页Journal of Electronics & Information Technology

基　　金：国家重大科研专项(2012ZX03001027-001)资助课题

摘　　要：在多入多出的干扰网络中,干扰对齐由于仅考虑干扰,而忽略期望信号的影响,在低信噪比(Signal-to-NoiseRatio,SNR)时性能损失严重。该文提出一种同时考虑干扰与期望信号的算法,把二者泄露出相应子空间的功率加权和作为目标函数,而且权值在不同SNR时可调,通过迭代获得预编码矩阵。仿真表明该算法在低信噪比时,可以有效提高系统容量。In nmltiple-input multiple-output interference channels, Interference alignment suffers from performance loss at low Signal-to-Noise Ratio （SNR） due to it neglecting the desired signal power. An algorithm is proposed that iteratively minimizes weighted sum of leakages caused by both interference and desired signal out of their corresponding subspace. The weighted factors are allowed to be adjusted according to SNR. Simulation result shows that the proposed algorithm can improve sum rate effectively at low SNR.

关 键 词：信号处理 干扰对齐 干扰信道 子空间投影 

分 类 号：TN92[电子电信—通信与信息系统]