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    Joint multipath-Doppler diversity in fast fading channels

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    Author
    Sayeed, Akbar M.; Aazhang, Behnaam
    Date
    2001-11-07
    Abstract
    We present a new framework for code-division multiple access (CDMA) communication over fast fading mobile wireless channels. The performance of the RAKE receiver, which is at the heart of existing CDMA systems, degrades substantially under fast fading encountered in many mobile scenarios. Due to the time-varying nature of the fast fading channel, we employ joint time-frequency processing, which is a powerful approach to time-varying signal processing. Whereas the RAKE receiver exploits multipath diversity to combat fading, our framework is based on joint multipath-Doppler diversity facilitated by a fundamental time-frequency decomposition of the channel into independent flat fading channels. Diversity processing is achieved by a time-frequency generalization of the RAKE receiver which can be leveraged into several important aspects of system design. Performance analysis shows that CDMA systems based on the time-frequency RAKE receiver, due to their inherently higher level of diversity, can potentially deliver significant performance gains over existing systems.
    Description
    Conference Paper
    Citation
    A. M. Sayeed and B. Aazhang, "Joint multipath-Doppler diversity in fast fading channels," vol. 6, no. 6, 1998.
    Published Version
    http://dx.doi.org/10.1109/ICASSP.1998.679554
    Keyword
    code division multiple access (CDMA); RAKE receiver; time-frequency; fast fading channels; joint multipath-Doppler diversity; More... code division multiple access (CDMA); RAKE receiver; time-frequency; fast fading channels; joint multipath-Doppler diversity Less...
    Type
    Conference paper
    Citable link to this page
    https://hdl.handle.net/1911/20337
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    • ECE Publications [1442]

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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892
    Site Map