分布式MIMO 系统的迭代空时检测算法

针对未来无线通信系统中广义分布式天线阵的架构，提出了一种适用于分布式多输入多输出（MIMO）系统的LST-STBC 空时编码方案．该方案通过具有差错控制编码的分层空时（LST）结构与基于正交设计的分组空时码（STBC）的有效结合，同时获得了分集和复用增益．针对提出的空时编码结构，接收端采用基于软干扰抵消和最小均方误差（MMSE）的迭代检测算法，通过检测和译码软信息的迭代，有效降低了系统的误码率．仿真结果表明，文中提出的基于接收端迭代检测的空时编码方案能有效提高分布式MIMO 系统的传输速率和传输质量．

An Iterative Detection Algorithm in Distributed MIMO System Employing Space-time Coding

A scheme of LST-STBC space-time coding is proposed for distributed multiple input multiple output (MIMO) system in generalized distributed antenna array architecture of the future wireless communication system. The combination between layered space-time (LST) architecture with error control coding and space-time block codes (STBC) based on orthogonal design in the scheme obtains diversity and multiplexing gains synchronously. As the proposed structure of space-time coding, the iterative detection algorithm based on the soft interference cancellation with minimum mean squared error (MMSE) is employed in the receiver. The soft information exchanged iteratively between detector and decoder decreases bits error rate successfully. The simulation results manifest that the proposed space-time coding scheme based on iterative detection algorithm in the receiver improves transmission rate and quality of the distributed MIMO system efficiently.