时变信道下基于多接收天线的OSTBC译码器研究

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (5): 1007-1010.

时变信道下基于多接收天线的OSTBC译码器研究

王勇¹, 廖桂生¹, 王喜媛²

1. 西安电子科技大学雷达信号处理国家重点实验室, 陕西, 西安, 710071;
2. 西安电子科技大学科学研究处, 陕西, 西安, 710071

收稿日期:2008-01-21 修回日期:2008-07-07 出版日期:2009-05-20 发布日期:2010-01-03
作者简介:王勇(1978- ),男,博士研究生,主要研究方向为阵列信号处理.E-mail;wangyong@mail.xidian.edu.cn
基金资助:
陕西省科技计划项目;西安市科技计划项目资助课题(CXY08016)

Study on OSTBC detector based on multi-received antennas under time-varying channels

WANG Yong¹, LIAO Gui-sheng¹, WANG Xi-yuan²

1. National Key Lab., of Radar Signal Processing, Xidian Univ., Xi'an 710071, China;
2. Dept. of Science and Research, Xidian Univ., Xi'an 710071, China

Received:2008-01-21 Revised:2008-07-07 Online:2009-05-20 Published:2010-01-03

摘要/Abstract

摘要： 针对传统正交空时分组码(OSTBC)均假设码字周期内为静态平坦信道,而实际环境由于接收端的运动引起信道时间选择性衰落,导致传统译码算法在高信噪比下性能严重下降的问题,并且以往算法只适用于两根发射天线的系统,提出一种适用于四根发射天线和多根接收天线的快时变衰落信道译码算法,该算法采用改进的迫零译码,对噪声扩展进行了有效抑制,克服了其他算法出现地板效应的缺陷,并且计算复杂度低.

Abstract: All orthogonal space-time block coding(OSTBC) schemes assume that the channel remains static during the length of the codeword.However,time selective fading channels do exist because of receiver movement,and under such conditions the conventional OSTBC detector will suffer from an error floor in the high signal-to-noise ratio case.Some detectors have been proposed under time-selective fading channels,which are mainly for the 2-Tx OSTBC case only.An improved zero forcing implementation for 4-Tx and multi-Rx systems is presented.This new scheme incurs no noise amplification,eliminates the error floor caused by channel variation and reduces computational complexity.

中图分类号:

TN919.3

王勇, 廖桂生, 王喜媛. 时变信道下基于多接收天线的OSTBC译码器研究[J]. Journal of Systems Engineering and Electronics, 2009, 31(5): 1007-1010.

WANG Yong, LIAO Gui-sheng, WANG Xi-yuan. Study on OSTBC detector based on multi-received antennas under time-varying channels[J]. Journal of Systems Engineering and Electronics, 2009, 31(5): 1007-1010.

[1]	罗海玲, 宁晓燕, 郭凯丰, 刁鸣. 基于OCML构造序列的Link16扩频方法[J]. 系统工程与电子技术, 2022, 44(12): 3837-3842.
[2]	张培欣, 王建新, 任鹏, 杨树树, 宋海伟. 基于CRC的ASM信号维特比纠错算法[J]. 系统工程与电子技术, 2021, 43(10): 2992-2999.
[3]	庄陵, 叶华双. 改进的压缩感知限幅噪声消除方案[J]. 系统工程与电子技术, 2021, 43(8): 2341-2346.