Low-Complexity Group Layered Space-Time Detection in Spatial Correlated MIMO Channels

Group layered space-time can attain a better tradeoff between data rate and diversity gain. In this paper, we propose a generalized detection that is an ordered successive detection employing an extended Gaussian elimination algorithm. The detection algorithm can reduce computational complexity, as low as O(Nt²Nr) per symbol interval, by using the characteristics of the channel matrix. Nt and Nr are the number of transmitter and receiver antennas, respectively. Simulation results show that the proposed detector can achieve low-complexity and better performance over linear MMSE ones. In addition, the effect of spatial correlation in GLST systems is discussed from the BER performance.