Independent Component Analysis Applied to Multiple Antenna Space-Time Systems

Theoretical investigation have shown that multiple antenna schemes can improve link reliability and provide high spectral efficiency. Space-time block coding (STBC) and vertical Bell Labs layered space time (V-BLAST) systems are capable of meeting these requirements by using multiple antenna strategies, respectively. However, in order to achieve largely improved performance they need precise channel information at the receiver, which is difficult to be guaranteed in some specific scenarios. In this paper, independent component analysis (ICA) technique is exploited to detect the transmitted signals blindly, which needs not the channel estimation. By analyzing the essential structures of STBC and V-BLAST systems, the specific models suitable to ICA are established. The robustness against channel estimation error and flexibility of system design can be acquired by using the ICA based scheme. Simulation results demonstrate the validity of proposed approach and the feasibility of ICA based scheme is also discussed