空间复用STBC系统接收机算法性能分析

doi:10.13190/jbupt.200703.83.wangjf

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (3): 83-87.doi: 10.13190/jbupt.200703.83.wangjf

空间复用STBC系统接收机算法性能分析

汪剑锋徐慧郑侃王文博

北京邮电大学无线通信中心无线信号处理和网络实验室北京邮电大学无线通信中心无线信号处理和网络实验室北京邮电大学无线通信中心无线信号处理和网络实验室

收稿日期:2006-09-02 修回日期:2006-11-20 出版日期:2007-06-30 发布日期:2007-06-30
通讯作者: 汪剑锋

Performance Analysis on Receiver Algorithms in Spatial Multiplexing STBC Systems

WANG Jian-feng, XU Hui, ZHENG Kan, WANG Wen-bo

School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2006-09-02 Revised:2006-11-20 Online:2007-06-30 Published:2007-06-30
Contact: WANG Jian-feng

摘要/Abstract

摘要：

介绍了空间复用-空时块码(SM-STBC)系统的基本原理和接收算法，对基于迫零 (ZF) 准则的检测算法的性能进行了理论分析，给出了采用ZF检测后的输出信噪比的概率密度分布函数，进而得到该接收算法下的分集增益大小和无信道编码下的误码率性能表达式，并通过计算机仿真印证了理论推导的正确性。从理论分析和仿真结果可以看出，通过在空间复用发射端引入STBC技术在损失了部分复用增益的情况下能够大大提高空间分集增益，获得更好的链路误码率性能。

关键词: 多入多出, 空间复用, 空时块码, 迫零检测, 分集增益

Abstract:

The basic principle and receiver algorithms of spatial multiplexing-space time block code (SM-STBC) system are first introduced. The theory analysis on zero-forcing (ZF) detection is presented, based on the probability density function (PDF) of the output signal to noise rate (SNR). Therefore, the diversity gain and un-coded bit error rate (BER) expressions are derived and verified by computer simulation. Theory analysis and simulation results both demonstrate that through introducing STBC to the SM systems, SM-STBC can achieve much more diversity gain, i.e. better BER performance, at the price of loss of partial multiplexing gain.

Key words: multiple-input multiple-output, spatial multiplexing, space-time block code, zero-forcing detector, diversity gain

中图分类号:

TN911.72

汪剑锋徐慧郑侃王文博. 空间复用STBC系统接收机算法性能分析[J]. 北京邮电大学学报, 2007, 30(3): 83-87.

WANG Jian-feng, XU Hui, ZHENG Kan, WANG Wen-bo. Performance Analysis on Receiver Algorithms in Spatial Multiplexing STBC Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(3): 83-87.

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空间复用STBC系统接收机算法性能分析

Performance Analysis on Receiver Algorithms in Spatial Multiplexing STBC Systems

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