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Blind Channel Estimation for Multi-Rate Multicarrier DS/CDMA Communications

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Abstract

Multi-rate multicarrier DS/CDMA is a potentially attractive multiple access method for future wireless communications networks that must support multimedia, and thus multi-rate, traffic. Several receiver structures exist for single-rate multicarrier systems, but little has been reported on multi-rate multicarrier systems. Considering that high-performance detection such as coherent demodulation needs the explicit knowledge of the channel, based on the finite-length chip waveform truncation, this paper proposes a subspace-based scheme for timing and channel estimation in multi-rate multicarrier DS/CDMA systems, which is applicable to both multicode and variable spreading factor systems. The performance of the proposed scheme for these two multi-rate systems is validated via numerical simulations. The effects of the finite-length chip waveform truncation on the performance of the proposed scheme is also analyzed theoretically.

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Authors and Affiliations

  1. School of Electrical Engineering, Victoria University, Melbourne, VIC, 8001, Australia

    Lei Huang & Fu-Chun Zheng

  2. Department of Electrical & Computer Engineering, National University of Singapore, Singapore

    Lei Huang

Authors
  1. Lei Huang
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  2. Fu-Chun Zheng
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Correspondence to Lei Huang.

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Huang, L., Zheng, FC. Blind Channel Estimation for Multi-Rate Multicarrier DS/CDMA Communications. Int J Wireless Inf Networks 12, 69–78 (2005). https://doi.org/10.1007/s10776-004-2401-0

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