基于V-BLAST OFDM系统的天线选择算法

An Antenna Selection Algorithm Based on V-BLAST OFDM Systems

研究了天线选择,提出了一种基于垂直-贝尔实验室分层空时结构(V-BLAST)与正交频分复用(OFDM)相结合的系统的发送天线选择算法,使选用的发送天线组合对所有子载波的最小信号噪声干扰比(SNIR)最大化,以较好地解决V-BLAST系统检测要求信道的无线环境中有丰富的散射体,否则会严重恶化系统误比特率性能的问题.理论分析和仿真实验证明,应用该算法明显改善了系统的误比特率性能.

In vertical-Bell laboratory layered space-time （V-BLAST） systems, the detection of received signal needs rich scattering channel environment, otherwise the system bit error rate （BER） performance descends seriously. A transmit antenna selection algorithm based on V-BLAST orthogonal frequency division multiplexing （OFDM） systems is proposed to solve this problem in this paper. This algorithm selects the transmit antenna subset that will maximize the minimum signal-to-noise-plus-interference ratio （SNIR） on each sub-carrier. Theoretical analysis and computer simulation results show that the system BER performance is significantly improved by this algorithm.