Noncoherent multiuser communications: Multistage detection and selective filtering

Rajnish Sinha, Aylin Yener, Roy D. Yates

    Research output: Contribution to journalArticlepeer-review

    6 Scopus citations


    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.

    Original languageEnglish (US)
    Pages (from-to)1415-1426
    Number of pages12
    JournalEurasip Journal on Applied Signal Processing
    Issue number12
    StatePublished - Dec 2002

    All Science Journal Classification (ASJC) codes

    • Signal Processing
    • Hardware and Architecture
    • Electrical and Electronic Engineering


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