关键词: 分层空时码, 多输入多输出（MIMO）系统, QR算法, P-ICQR算法

Abstract: A parallel interference cancellation QR decomposition detection algorithm of VBLAST-OFDM is proposed.It makes hypothesis to the first detection layer and divides several parallel branches.The detected signal is eliminated successively from the receive vector of each branch，after that，other signals are detected by using QR factorization，but only the last detected signal that has the highest diversity gain is reserved.Finally，the optimal solution of several branches is selected to be as the final detection result by using partial ML and the performance is improved effectively.Simulation results show that the proposed P-ICQR algorithm is superior to the conventional parallel algorithm，IQRD algorithm，QR algorithm and ZF algorithm.

Key words: Vertically Bell Laboratories Layered Space-Time（VBLAST）, Miltiple Input and Multiple Output（MIMO）, QR algorithm, P-ICQR algorithm