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  • 标题:Noncoherent Multiuser Communications: Multistage Detection and Selective Filtering
  • 本地全文:下载
  • 作者:Rajnish Sinha ; Aylin Yener ; Roy D. Yates
  • 期刊名称:EURASIP Journal on Advances in Signal Processing
  • 印刷版ISSN:1687-6172
  • 电子版ISSN:1687-6180
  • 出版年度:2002
  • 卷号:2002
  • 期号:12
  • 页码:1415-1426
  • DOI:10.1155/S1110865702209105
  • 出版社:Hindawi Publishing Corporation
  • 摘要:

    We consider noncoherent multiuser detection techniques for a system employing nonlinear modulation of nonorthogonal signals. Our aim is to investigate near-optimum noncoherent multiuser-detection techniques that utilize the received signal structure while retaining reasonable complexity. Near-optimum approximations of the maximum-likelihood detector are investigated where the signal structure is reflected in the approximation techniques explored. Several implementations of noncoherent-soft interference cancellers are proposed and investigated, each of which exploits the signal structure in a specific way. We propose a class of detectors that employ selective filtering, a technique that exploits the a priori information that each user selects one of M signals for transmission. We show that selective filtering offers improved performance over the noncoherent counterparts of the existing near-optimum multiuser detectors. Both deterministic and blind adaptive implementations of selective filtering are considered. Numerical comparisons are provided to demonstrate the near-optimum performance of the proposed detectors.

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