Adaptive CDMA cell sectorization with linear multiuser detection

Changyoon Oh, Aylin Yener

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    We consider the problem of adaptive cell sectorization in a CDMA system when the receiver employs a linear multiuser detector. Specifically, given the number of sectors and terminal locations, we investigate how to appropriately sectorize the cell, such that the total transmit power is minimized, while each user has acceptable quality of service, under the assumption that the base station employs linear multiuser detectors. The resulting joint optimization problem has high complexity for arbitrary signature sequences, so we concentrate on the tractable case where the square of the crosscorrelation values between the signature sequences are equal. We formulate the sectorisation problem for different linear detectors. The optimum sectorization problem with linear multiuser detector has the same complexity as the one with the matched filter. Numerical results suggest that significant power saving is achieved by incorporating better receiver structures, i.e. MMSE detector, or decorrelator.

    Original languageEnglish (US)
    Pages (from-to)962-966
    Number of pages5
    JournalIEEE Vehicular Technology Conference
    Volume58
    Issue number2
    StatePublished - 2003

    Fingerprint

    Multiuser Detection
    Multiuser detection
    Code Division multiple Access
    Code division multiple access
    Detector
    Detectors
    Cell
    Receiver
    Signature
    Matched Filter
    Power Saving
    Matched filters
    Minimum Mean Square Error
    Cross-correlation
    Base stations
    Quality of Service
    Quality of service
    Sector
    Optimization Problem
    Numerical Results

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering
    • Computer Science Applications
    • Applied Mathematics

    Cite this

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    abstract = "We consider the problem of adaptive cell sectorization in a CDMA system when the receiver employs a linear multiuser detector. Specifically, given the number of sectors and terminal locations, we investigate how to appropriately sectorize the cell, such that the total transmit power is minimized, while each user has acceptable quality of service, under the assumption that the base station employs linear multiuser detectors. The resulting joint optimization problem has high complexity for arbitrary signature sequences, so we concentrate on the tractable case where the square of the crosscorrelation values between the signature sequences are equal. We formulate the sectorisation problem for different linear detectors. The optimum sectorization problem with linear multiuser detector has the same complexity as the one with the matched filter. Numerical results suggest that significant power saving is achieved by incorporating better receiver structures, i.e. MMSE detector, or decorrelator.",
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    Adaptive CDMA cell sectorization with linear multiuser detection. / Oh, Changyoon; Yener, Aylin.

    In: IEEE Vehicular Technology Conference, Vol. 58, No. 2, 2003, p. 962-966.

    Research output: Contribution to journalArticle

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