A Fast Nonlinear Detection Algorithm for Multi-user VBLAST MIMO System
Zhao Liu · Signal Processing · 2008
A fast nonlinear detection algorithm is proposed for multi-user CDMA Vertical Bell Laboratories Layered Space Time (VBLAT)Multiple-Input Multiple-Output(MIMO)system.In this algorithm,the received data at multiple receiver antennas are nonlin- early mapped by kernel method and then summed with weights,at last a hard decision output based on this sum is made.The weight co- efficients are incrementally computed to avoid direct computation of the inverse of a matrix,which greatly reduces the computational com- plexity.Simulations and comparisons show that the proposed algorithm can obtain better performance of Bit Error Rate(BER)than line- ar Minimum Mean Square Error(MMSE).