用于MIMO信号检测的降低复杂度V-BLAST算法  

Reduced-complexity V-BLAST algorithm for MIMO signal detection

作　　者：刘谦雷[1] 杨绿溪[1] 许道峰[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《通信学报》2007年第9期40-45,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60672093;60496310);江苏省自然科学基金资助项目(BK2005061)~~

摘　　要：用于多输入多输出(MIMO)通信系统信号检测的V-BLAST算法其预处理具有较高的运算复杂度。对此作出改进,提出了一种降低复杂度V-BLAST算法。该算法在V-BLAST每一步的检测中不仅选取信噪比/信干噪比最大的一路信号、而且同时选取信噪比/信干噪比足够大的各路信号一起进行检测。仿真结果显示,该降低复杂度V-BLAST算法在取得与常规V-BLAST检测十分接近的误码性能的同时,达到了显著低于后者的预处理复杂度。V-BLAST algorithm for the signal detection of multiple-input multiple-output （MIMO） communication systems has a high complexity in its pre-processing. A reduced-complexity V-BLAST algorithm was proposed to improve it. This algorithm detects not only the layer with the maximum signal-to-noise ratio （SNR） / signal-to-interference-and-noise ratio （SINR） but also the ones with sufficiently large SNRs/SINRs in each stage of the V-BLAST algorithm. Simulation results show that while obtaining a very close performance to the conventional V-BLAST detection, the proposed reduced-complexity V-BLAST algorithm achieves a significantly lower pre-processing complexity.

关 键 词：信号检测 V-BLAST算法 运算复杂度 

分 类 号：TN911.5[电子电信—通信与信息系统]