基于MIMO的垂直分层空时码检测算法

分层空时码(BLAST)是贝尔实验室提出的一种基于多入多出(MIMO)传输方式的空时码系统。本文着重研究了BLAST系统中一类垂直分层空时码的检测算法,依据信号模型,分析推导了基于迫零准则和最小均方误差准则的估计算法,并在此基础上采用了以上算法与判决反馈及最佳排序思想结合的方法,使系统的误码率性能得到了提高。最后通过仿真实验比较了各种算法的性能和特点,结果表明分层空时码用于无线通信具有极大优势。

Detection Algorithms for MIMO-BLAST Architecture

Layered Space-Time Code is a novel Multi-Input Multi-Output (MIMO)antenna scheme based on the Bell Laboratories Layered Space-Time(BLAST) architecture. This paper focuses on the detection algorithms for a kind of BLAST, known as Vertical BLAST(V-BLAST). Based on its signal model, this paper analyzes and describes the detection algorithms with Zero-Forcing and MMSE solutions and then improves the performance by combining such algorithms with Decision-Feedback Detection and optimal ordering schemes. Finally this paper demonstrates the performance comparison between these algorithms through simulation results and its great prospect on wireless communications.