A parallel interference cancellation detection algorithm for VBLAST-OFDM system

A parallel interference cancellation detection algorithm based on QR decomposition for VBLAST-OFDM system is proposed in this paper. It makes use of the first detection layer and separates it into several parallel branches. The detected signal is eliminated successively from the received 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 the 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, and QR algorithm.