基于MIMO OFDM系统的一种低复杂度球型译码检测算法*

在已知的多输入多输出(MIMO)及正交频分复用(OFDM)系统的信号检测算法中，球型译码检测算法的译码性能十分接近于性能最优的最大似然检测算法，并且其译码复杂度有很大的降低，但其会受到译码半径的影响。普通的球型译码检测算法，信道噪声对算法的译码半径影响较大，为了降低信道噪声对译码半径的影响度，提出了一种新型的球型译码检测算法，该算法在译码初始半径分别根据两种不同的情况作出选择。仿真结果显示，其选择的译码半径受噪声的影响极小，达到了降低译码复杂度的目的。总体而言，新型的球型译码检测算法极大地降低了译码复杂度

Low complexity sphere decoding detection algorithm based on MIMO-OFDM system

In the well known signal detection algorithms of multiple-input multiple output and orthogonal frequency division multiplexing(MIMO-OFDM) system,the sphere detection algorithm's decoding performance is very close to maximum likelihood detection algorithm,and its decoding complexity is greatly reduced but impacting by the radius of decoding.For the ordinary sphere decoding algorithm,its radius of decoding is greatly impacted by noise of channel.For reducing the impaction of channel's noise,this paper propose...