Novel serial group interference canceller scheme for asynchronous multirate DS-CDMA systems

The performance of multirate structures, implemented with the multiple codes (MC) scheme, and associated with multiuser detection (MuD) of successive interference cancellation (SIC) for group of users (GSIC), considering a hyperbolic tangent (named hereafter as tanh) decision device in the intermediate stages, is analyzed. Extensive Monte Carlo simulations (MCS) were accomplished for the MC-GSIC tanh structure's performance characterization considering total and partial cancellation (with cancellation factor /spl xi/ < 1) in additive white Gaussian noise (AWGN) and flat Rayleigh channels.