用于MIMO单载波频域均衡的块BLAST算法

单载波频域均衡(SC-FDE)是多输入多输出(MIMO)无线通信中克服多径衰落的一种重要技术。本文基于V-BLAST信号检测的原理,对MIMO-SC-FDE系统提出了以块为单位进行分层检测的块BLAST算法。在该算法中,系统按一定的准则确定对各路发送信号进行频域均衡和检测的顺序,较先检测出的信号被变换到频域作为干扰从接收信号中去除,使得对以后各路信号进行频域均衡和检测的信干噪比得以提高,从而大大改善了MIMO-SC-FDE系统的误码性能。仿真实验结果显示,块BLAST算法取得了大大优越于MIMO-SC-FDE常规检测算法的误码性能。

Block BLAST algorithm for MIMO single-carrier frequency-domain-equalization

Single-carrier frequency-domain-equalization (SC-FDE) is an important technique to combat the multipath fading in MIMO wireless communication. Based on the principle of V-BLAST signal detection, this paper proposes a block-based layered detection algorithm, named block BLAST algorithm, for MIMO SC-FDE system. In this algorithm, the system decides the order of FDE and detection for transmitted signals according to a predetermined criterion, and the signals detected out earlier are transformed back to the frequency domain and then cancelled as interferences in the received signals, since the signal to interference and noise ratio in subsequent FDEs and detections are increased, the BER performance of the MIMO SC-FDE is improved greatly. Simulation results demonstrate that the block BLAST algorithm gets a much better BER performance than the ordinary detection algorithm in MIMO SC-FDE.