A New Detection Scheme for Layer Space-time Signals

Owing to the error propagation, the performance of VBLAST is constrained by the accuracy of the symbols recovered in the previous layer when the traditional detection successive interference cancellation (SIC) algorithm is applied. The performance of VBLAST depends on the performance of the first detected layer. So we proposed a new detection scheme that the first stage is detected with iterative method and the second stage using linear ZF detection detects others layer signals.. The proposed algorithm reduces the error propagation. Simulation result states that proposed scheme outperform to ZF-VBLAST about 4.5 dB at 10-3 error bit rate.