一种高效的QMC检测算法

基于垂直分层空时码的MIMO-OFDM系统提出一种高效的QMC检测算法，该算法对信道矩阵进行一次排序QR分解，对最先检测的信号层采用ML-OSIC算法，用M算法检测中间的信号层，逐层增加保留值M以提高算法有效性，利用串行干扰消除检测余下的信号层。与QRD-M算法相比，QMC检测算法能降低计算复杂度。仿真结果表明，该算法以更低的计算复杂度获得更接近最大似然检测的性能，取得性能与复杂度之间的折中更理想。

High Efficient QMC Detection Algorithm

This paper proposes a new high efficient algorithm based on Vertical Bell Laboratories Layered Space-Time coding（V-BLAST） for MIMO-OFDM systems. The proposed QMC algorithm sorts the channel matrix, and uses the QR decomposition. At the beginning of the detection, the Maximum Likelihood-Ordered Serial Interference Cancellation（ML-OSIC） algorithm is utilized, and the M algorithm is applied to detect the middle symbol layers with M gradually increasing for more effmiency, then the SIC is used for detecting the remained symbol layers. Compared with the conventional QRD-M algorithm, the proposed algorithm significantly reduces the complexity and its performance gets closer to Maximum Likelihood Detection（MLD） performance. Simulation results show that the performance of the proposed QMC algorithm is very close to the MLD algorithm, it obtains a better tradeoff between complexity and performance.