多入多出系统中改进的QRD-M检测算法

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10dB、调制方式为16QAM、天线配置为4x4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%.%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.