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Blind separation of BPSK sources by electrically steerable parasitic array radiator

Blind source separation has been applied successfully to suppress co-channel interferences for wireless communications. In this paper, an independent component analysis (ICA) based method is proposed to blindly separate BPSK sources by using electrically steerable parasitic array radiator (ESPAR) antennas. Variable reactance vector scheme and oversampling techniques are used to generate different complex beam patterns. I/Q demodulation is used to obtain two times more independent real patterns which are used to form the standard ICA mixture model. Experimental results show that the ICA method can separate more BPSK sources than the element number of the ESPAR antennas.