北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (2): 47-51.doi: 10.13190/jbupt.200902.47.yangy

• 论文 • 上一篇    下一篇

MIMO系统中基于分组结构的迭代检测器

杨远 张海林 胡军锋 牛忠霞   

  1. 西安电子科技大学 西安电子科技大学 西安电子科技大学
  • 收稿日期:2008-06-01 修回日期:2008-12-29 出版日期:2009-04-28 发布日期:2009-04-28
  • 通讯作者: 杨远

Iterative detector based on grouped signals for MIMO <SPAN lang=EN-US style=

Jun-feng Hu   

  • Received:2008-06-01 Revised:2008-12-29 Online:2009-04-28 Published:2009-04-28

摘要:

利用降维分组和迭代检测的思想,提出并行和串行2种结构的迭代分组检测器. 迭代分组检测器利用上一次检测得到软信息更新关于干扰信号的均值和白化滤波器系数,这样可以显著降低系统误码率,而在每次迭代之间,随机分组算法的使用又进一步降低系统误码率. 仿真结果表明,并行分组最大后验概率检测器能在系统性能、检测延时和复杂度之间取得较好的平衡,是可以选择的检测算法.

关键词: 多输入多输出系统, 迭代检测, 连续干扰抵消, 并行干扰抵消

Abstract:

Based on the grouped signals and iterative detections, both parallel and serial iterative detectors are proposed for multipleinput multipleoutput (MIMO) wireless systems. The iterative detectors use the soft information obtained from last detection to get the mean of the interference signals and the coefficients of the whitening filter. Thus the iterative detector can greatly reduce the biterror rate. Between the iterations, the random grouping algorithm can further reduce the biterror rate. Simulation shows that the maximum parallel iterative groups a posterior detector (PIGMAP) and has a good balance between the system performance and the detection delay and the complexity. So PIGMAP will be a promising choice in practice use.

Key words: multipleultiple;output systems, iterative detection, successive interf     erence cancellation, parallel interference cancellation