MMSE V-BLAST Algorithm Based on Iterative QR Decomposition
Zhibin Xie · Journal of Northeastern University · 2008
An improved MMSE(minimum mean square error) V-BLAST algorithm based on iterative QR decomposition is proposed to solve the problem that the complexity of detection becomes higher because lots of pseudo-inverse operations have to be taken when detecting the receiving end of MIMO system with MMSE algorithm.As a result,the complexity is reduced efficiently with the detection performance clearly improved.In the environment where lots of wireless communications were scattered over,a simulation testing was done and the results showed that the computation complexity of the proposed algorithm is obviously reduced in comparison with conventional algorithms only if the BER doesn't change dramatically with the same SNR.The theoretical analysis proves that the more the number of effective antennae,the better the performance of the algorithm proposed.