Cochannel interference cancellation for frequency hopped multiple access systems

Based on an analysis of the cochannel interference (CCI) pattern of a frequency hopped multiple access signal, the paper proposes a new multiuser detection algorithm for canceling the CCI in frequency hopped multiple access systems. In the proposed scheme, the CCI is cancelled by first detecting the frequency hopping slot, and then classifying and regenerating the candidates of the interference pattern from the time-frequency matrix. Both theoretical analysis and computer simulation results show that, compared to the conventional detector and Mabuchi's detector, this new multiuser detector has lower complexity, better convergence stability, and is suitable for both additive white Gaussian noise (AWGN) channels and Rayleigh fading channels.