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Performance of NLMS-based Parallel Interference Cancellation (PIC) For Up-Link CDMA Systems

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Abstract

Parallel interference cancellation (PIC) is a promising detection technique to suppress multiple access interference (MAI) for up-link direct-sequence CDMA (DS-CDMA) systems. Adaptive PICs are attractive due to its low implementation complexities and good performance. In this paper, we propose a general framework for analyzing the bit error rate (BER) and convergence performance of the normalized LMS (NLMS) based PIC. To further improve the convergence speed of the PIC system, a novel switch-mode noise-constrained NLMS (SNC-NLMS) algorithm for the adaptive multistage PIC (AMPIC) is also proposed. Simulation results show that the analytical results are reasonably accurate and the SNC-NLMS AMPIC outperforms the NLMS-based one, if the algorithm parameters are properly chosen.

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong

    S. C. Chan & Y. J. Chu

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  1. S. C. Chan
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  2. Y. J. Chu
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Correspondence to S. C. Chan.

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Chan, S.C., Chu, Y.J. Performance of NLMS-based Parallel Interference Cancellation (PIC) For Up-Link CDMA Systems. J Sign Process Syst 78, 155–162 (2015). https://doi.org/10.1007/s11265-013-0842-3

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  • DOI: https://doi.org/10.1007/s11265-013-0842-3

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