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Modified SMC method of blind multiuser detection for DS-CDMA systems over fading channels

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Abstract

This paper presents the application of sequential Monte Carlo (SMC) methodology for blind detection in wireless direct sequence code division multiple access (DS-CDMA) systems over fading channels. It is known that the conventional SMC method requires a high-computational complexity that grows exponentially with the number of active users. This paper proposes a solution to this problem by employing Cholesky factorization to decompose the observed data into separate components for each user and then the parameters of each user are estimated with the SMC inference method under the decision feedback framework. Based on these concepts, an efficient blind decision feedback SMC (DF-SMC) receiver is developed for differentially encoded DS-CDMA systems. Simulation results demonstrate the promising performance of the proposed receiver for both flat fading and frequency-selective fading channels.

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Authors and Affiliations

  1. Wireless Office, Panasonic Singapore Laboratories Pte Ltd, Singapore, Singapore

    Qian Yu

  2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore

    Guoan Bi

  3. School of Electrical & Information Engineering, University of South Australia, Adelaide, SA, Australia

    Liren Zhang

Authors
  1. Qian Yu
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  2. Guoan Bi
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  3. Liren Zhang
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Correspondence to Guoan Bi.

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Yu, Q., Bi, G. & Zhang, L. Modified SMC method of blind multiuser detection for DS-CDMA systems over fading channels. Wireless Pers Commun 43, 1339–1349 (2007). https://doi.org/10.1007/s11277-007-9306-z

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  • DOI: https://doi.org/10.1007/s11277-007-9306-z

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