Novel Frequency-Domain Implementation Method for Joint Frequency Domain Equalization and Interference Cancellation

A novel low-complexity frequency-domain implementation method is proposed for the receiving algorithm combined frequency domain equalization and interference cancellation. By using overlap-cut method, the multiuser interference (MUI) at each stage of iteration is regenerated by multiplication in frequency domain instead of by linear convolution in time domain, and then the regenerated MUI is cancelled in frequency domain. Simulation results show that the proposed method has slight bit-error-rate (BER) performance loss than conventional time-domain methods only at high SNRs, but the former is much simpler than the latter in computational complexity.