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 and multistage) correspond to linear matrix filtering that can be performed directly on the received chip-matched filtered signal vector without explicitly performing:the interference cancellation, This leads to an analytical expression for calculating the resulting bit-error rate which is of particular Use for short-code systems, Convergence issues are discussed, and the concept of epsilon-convergence is introduced to determine the number of stages required for practical convergence for both short and long codes.