Parallel Detection Algorithm of V-BLAST

To improve system capacity is always a hotspot in mobile communication systems.Therefore,space-time code techniques have been widely studied in wireless communications,for they provide better signal qualities in fading channel environments and increase system capacity.As an important space-time code,Vertical Bell lab Layered Space-Time (V-BLAST) code has been paid much attention in recent years.However,traditional detection algorithm of V-BLAST needs much time in performing linear nulling and successive symbol cancelling.The more the number of transmit antennas are,the more the process time delay is.Aiming in solving this problem,a new scheme based on linear nulling and parallel symbol cancellation is proposed in this paper.The new scheme is of less time delay and simpler detection structure.And the simulation results of new scheme are obtained by COSSAP simulation in flat Rayleigh channels.These simulation results are presented to verify the BER performance of new scheme based on parallel symbol cancellation.