An Efficient Detection Algorithm for Algebraic Coded V-BLAST Systems

The V-BLAST multiple antenna architecture is a well- known method for achieving high spectral efficiency over a rich-scattering environment. In V-BLAST systems, detection is performed layer by layer in a successive way. However, due to error propagation, the system performance is largely constrained by the accuracy of the lower layers detected first. In order to improve the performance of the low layers, in this paper, we give an algebraic coded V-BLAST scheme, which employs algebraic code in the lower layers of V-BLAST systems. At the receiver, an efficient detection algorithm which combines list sphere decoder and sorted QR decomposition successive interference cancellation is proposed. Simulation results show that the new detection method significantly outperforms the conventional ZF-VBLAST and MMSE-VBLAST schemes.