新的4天线准正交空时分组码设计方案

一种新的4天线准正交空时分组码设计方案

内容简介：为了提高多输入多输出（ MIMO）系统的性能，以获得更大的信道容量和更高的传输速率，分析了几种典型准正交空时分组码的结构及特点，提出了一种新的4天线准正交分组码设计方案。方案满足准正交设计关系，可以实现全速率发射和接收。建立了系统模型，设计出发射天线数为4的准正交空时分组码，采用最大似然译码算法进行译码，与传统准正交空时分组码分别进行了性能仿真。仿真结果表明，在不增加译码复杂度的情况下，4天线准正交空时分组码的编码性能略优于已有典型的Jafarkhani码。

Abstract：In order to improve the performance of MIMO system and generate higher channel capacity and higher transmission rate,this paper analyzes the structure and character of several types of Quasi-orthogonal Space-time Block Codes ( QSTBC) ,proposes a novel design scheme of QSTBC for four-antennas based on quaternion quasi-orthogonal block codes.This scheme can meet quasi-orthogo-nal design relation and implement transmission and reception with full rate.The system model is formulated firstly,then this scheme of QSTBC for four transmit antennas is designed,and the maximum likelihood decoding algorithm is adopted. Finally the scheme is com-pared with the traditional QSTBC.Simulation results show that the scheme of QSTBC provides better performance than the existing typi-cal Jafarkhani scheme,while the decoding complexity is the same as other quasi-orthogonal codes.

作者：王立莹, 李媛, 晋荣,

关键词：MIMO系统, 全速率, 准正交空时分组码, 最大似然译码,