A matrix-algebraic approach to successive interference cancellation in CDMA

In this paper, we describe linear successive interference cancellation (SIC ) based on matrix-algebra, We show that linear SIC schemes (single-stage an d multistage) correspond to linear matrix filtering that can be performed d irectly on the received chip-matched filtered signal vector without explici tly performing:the interference cancellation, This leads to an analytical e xpression for calculating the resulting bit-error rate which is of particul ar Use for short-code systems, Convergence issues are discussed, and the co ncept of epsilon-convergence is introduced to determine the number of stage s required for practical convergence for both short and long codes.