计算机工程 ›› 2011, Vol. 37 ›› Issue (3): 77-79.doi: 10.3969/j.issn.1000-3428.2011.03.028

• 网络与通信 • 上一篇    下一篇

多入多出系统中改进的QRD-M检测算法

贾龙真,李兆训   

  1. (解放军信息工程大学信息工程学院,郑州 450002)
  • 出版日期:2011-02-05 发布日期:2011-01-28
  • 作者简介:贾龙真(1985-),男,硕士研究生,主研方向:MIMO信号检测;李兆训,副教授、硕士
  • 基金项目:
    国家“863”计划基金资助项目(2009AA011504);国家重大专项基金资助项目(2009ZX03003-008)

Improved QRD-M Detection Algorithm in MIMO System

JIA Long-zhen, LI Zhao-xun   

  1. (Institute of Information Engineering, PLA Information Engineering University, Zhengzhou 450002, China)
  • Online:2011-02-05 Published:2011-01-28

摘要: 在研究传统QRD-M检测算法的基础上,提出一种用于多入多出系统的改进的QRD-M检测算法。该算法通过累积分支度量排序和终止门限设置,合理减少搜索树的分支数。仿真结果表明,当信噪比为10 dB、调制方式为16QAM、天线配置为4×4时,改进算法在无检测性能损失的情况下可使传统QRD-M检测算法的复杂度降低30%。

关键词: 多入多出系统, 信号检测, QRD-M检测

Abstract: Based on studying the conventional QRD-M algorithm for Multi-Input-Multi-Output(MIMO) signal detection, an improved QR-Decomposition-based M detection(QRD-M) algorithm is proposed. Through arranging accumulative measurement of branches and setting termination threshold, the number of branches searched decreases in the proposed algorithm reasonably. Simulation results manifest that when SNR is 10 dB, the scheme of modulation is 16QAM and using 4×4 antenna configurations, the improved algorithm can get 30% reduction in computational complexity compared with the conventional QRD-M algorithm without losing detection performance.

Key words: Multi-Input-Multi-Output(MIMO) system, signal detection, QR-Decomposition-based M detection(QRD-M)

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