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    Code orthogonality for wideband CDMA systems with multiple transmit antennas

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    Authors
    Hunukumbure, Mythri
    Allen, Ben
    Beach, Mark
    Affiliation
    Fujitsu Laboratories of Europe Limited, Uxbridge
    Issue Date
    2007-11
    Subjects
    code orthogonality
    space-time block codes
    wideband CDMA
    fixed beamforming
    transmit diversity
    wideband code-division multiple access (WCDMA)
    WCDMA
    
    Metadata
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    Abstract
    Code orthogonality is a useful indicator in determining the performance of the synchronous downlink of third generation Universal Mobile Telecommunication System (UMTS) Terrestrial Radio Access systems. In this paper, previous work on quantifying code orthogonality for single-antenna [or single-input single-output (SISO)] links is extended to fixed beamforming and transmit diversity schemes. Code orthogonality estimates from real measured channel data are extracted for typical outdoor radio environments. The results indicate that the spatial conditioning of fixed beamforming radio channels generally improves code orthogonality. In contrast, full code-rate transmit diversity schemes degrade code orthogonality.
    Citation
    Hunukumbure, M., Allen, B., Beach, M. (2007) 'Code Orthogonality for Wideband CDMA Systems With Multiple Transmit Antennas' IEEE Transactions on Vehicular Technology 56 (6):3749-3756
    Publisher
    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
    Journal
    IEEE Transactions on Vehicular Technology
    URI
    http://hdl.handle.net/10547/272976
    DOI
    10.1109/TVT.2007.904525
    Additional Links
    http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4357097
    Type
    Article
    Language
    en
    ISSN
    0018-9545
    ae974a485f413a2113503eed53cd6c53
    10.1109/TVT.2007.904525
    Scopus Count
    Collections
    Centre for Wireless Research (CWR)

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