Rank Constrained Temporal-Spatial Filters for CDMA Systems in Multipath Channels

Aylin Yener, Önder Filiz

    Research output: Contribution to conferencePaper

    2 Citations (Scopus)

    Abstract

    In this paper, a receiver structure which combines multiuser detection (temporal filtering) and receiver beamforming (spatial filtering) in a multipath environment is considered. Following [1], [2], we model the receiver as a linear matrix filter and use the minimum mean-squared error (MMSE) as the performance criterion. Motivated by the complexity of the optimum receiver, we propose rank constrained temporal-spatial filters which are simpler and near optimum. The MSE is minimized subject to a structural constraint, using an iterative alternating minimization algorithm. Numerical results indicate that a performance close to that of the optimum filter can be achieved with a simple iterative structure, even in highly loaded systems. Least mean squares (LMS) is used to formulate the adaptive implementations and the convergence properties are investigated along with the effect of the number of multipath components.

    Original languageEnglish (US)
    Pages272-276
    Number of pages5
    StatePublished - Dec 1 2003
    EventIEEE Global Telecommunications Conference GLOBECOM'03 - San Francisco, CA, United States
    Duration: Dec 1 2003Dec 5 2003

    Other

    OtherIEEE Global Telecommunications Conference GLOBECOM'03
    CountryUnited States
    CitySan Francisco, CA
    Period12/1/0312/5/03

    Fingerprint

    Multiuser detection
    Multipath propagation
    Beamforming
    Code division multiple access
    filter
    matrix

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering
    • Global and Planetary Change

    Cite this

    Yener, A., & Filiz, Ö. (2003). Rank Constrained Temporal-Spatial Filters for CDMA Systems in Multipath Channels. 272-276. Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States.
    Yener, Aylin ; Filiz, Önder. / Rank Constrained Temporal-Spatial Filters for CDMA Systems in Multipath Channels. Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States.5 p.
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    Yener, A & Filiz, Ö 2003, 'Rank Constrained Temporal-Spatial Filters for CDMA Systems in Multipath Channels', Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States, 12/1/03 - 12/5/03 pp. 272-276.

    Rank Constrained Temporal-Spatial Filters for CDMA Systems in Multipath Channels. / Yener, Aylin; Filiz, Önder.

    2003. 272-276 Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States.

    Research output: Contribution to conferencePaper

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    AB - In this paper, a receiver structure which combines multiuser detection (temporal filtering) and receiver beamforming (spatial filtering) in a multipath environment is considered. Following [1], [2], we model the receiver as a linear matrix filter and use the minimum mean-squared error (MMSE) as the performance criterion. Motivated by the complexity of the optimum receiver, we propose rank constrained temporal-spatial filters which are simpler and near optimum. The MSE is minimized subject to a structural constraint, using an iterative alternating minimization algorithm. Numerical results indicate that a performance close to that of the optimum filter can be achieved with a simple iterative structure, even in highly loaded systems. Least mean squares (LMS) is used to formulate the adaptive implementations and the convergence properties are investigated along with the effect of the number of multipath components.

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    Yener A, Filiz Ö. Rank Constrained Temporal-Spatial Filters for CDMA Systems in Multipath Channels. 2003. Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States.