Transmit antenna selection for V-BLAST MIMO system based on extended channel matrix analysis

For the sake of reducing the hard cost of multiple RF chains and the complexity for spatial multiplexing systems, in this paper a novel low-complexity transmit antenna selection criterion is proposed based on MMSE V-BLAST system utilizing ordered successive interference cancellation (OSIC) detection. Unlike others transmit antenna selection schemes for V-BLAST systems, the proposed algorithm synthetically considers the impacts of detection order, interference cancellation and noise amplification due to that applying sub-optimal sorting and QR decomposition by introducing an extended channel matrix based on MMSE V-BLAST system. Theoretical analysis and simulation results show that the proposed algorithm achieves both higher outage capacity and better symbol error rate (SER) performance even with low computational complexity.