Equivalent channel-based receive antenna selection for GLST systems

For group layered space-time (GLST) systems with group successive interference cancellation detection (GSIC), we presented a receive antenna selection based on QR decomposition (QRD) of equivalent channel and suboptimal sorting. Subchannel matrices are sorted by Frobenius norm instead of Moore-Penrose pseudo-inverse, so that computational complexity is reduced. Moreover, an incremental algorithm based on equivalent channel is presented. Simulation results show that the proposed algorithms can achieve near-optimal outage capacity, and the performance of Frobenius norm-based algorithm is close to that of pseudo-inverse-based algorithm. There is a slight performance gap between presented methods, but the incremental algorithm with lower complexity.