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VLSI Implementation of an Adaptive Multiuser Detector for Multirate WCDMA Systems

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Abstract

A multirate receiver for WCDMA systems based on the adaptive signature method was designed and implemented. We employed an adaptive signature algorithm to consider two well-known multirate schemes, namely, the low rate and the high rate detector for variable spreading factor systems. In monorate scenarios, numerical experimentations showed that the adaptive signature method outperforms the Rake receiver and reaches the performances of the soft 4-stage multistage parallel interference cancellation receiver. In multirate scenarios, the performance comparison of two multirate schemes in floating-point and fixed-point was analyzed. Reusing the existing hardware architecture previously developed for monorate systems, we targeted the hardware implementation of these two multirate schemes on FPGA components.

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Acknowledgements

The authors would like to thank the Axiocom inc. and the National Science and Engineering Council of Canada (NSERC) for its financial support. Also, they acknowledge the reviewers for their useful comments that helped us to make the paper easier to read.

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Authors and Affiliations

  1. Laboratory of Signal and System Integration (LSSI), Department of Electrical and Computer Engineering, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, G9A 5H7, Canada

    Quoc-Thai Ho & Daniel Massicotte

  2. INRS-EMT, Montreal, Québec, H5A 1K6, Canada

    Quoc-Thai Ho

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  1. Quoc-Thai Ho
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  2. Daniel Massicotte
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Correspondence to Daniel Massicotte.

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Ho, QT., Massicotte, D. VLSI Implementation of an Adaptive Multiuser Detector for Multirate WCDMA Systems. J Sign Process Syst 61, 127–139 (2010). https://doi.org/10.1007/s11265-009-0410-z

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  • DOI: https://doi.org/10.1007/s11265-009-0410-z

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