A matrix-algebraic approach to successive interference cancellationin CDMA |
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Authors: | Rasmussen LK Lim TJ Johansson A |
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Affiliation: | Dept. of Comput. Eng., Chalmers Univ. of Technol., Goteborg; |
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Abstract: | 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 ϵ-convergence is introduced to determine the number of stages required for practical convergence for both short and long codes |
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