Theoretical analysis of the orthogonality factor in WCDMA downlinks

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    Wideband code-division multiaccess (WCDMA) downlink transmission is prone to self interference caused by the loss of orthogonality between the spreading codes due to multipath fading. The degree of loss of orthogonality in downlink WCDMA is usually measured in terms of the orthogonality factor (OF) which is directly related to the level of intra-cell interference. This paper presents accurate theoretical analysis of the OF over generalized fading channels. New exact expressions of the average OF are derived for full and partial RAKE receivers over arbitrarily correlated multipath fading channels.
    Original languageEnglish
    Article number5336759
    Pages (from-to)5394-5399
    Number of pages6
    JournalWireless Communications, IEEE Transactions on
    Issue number11
    Publication statusPublished - Nov 2009


    • broadband networks
    • code division multiple access
    • fading channels
    • interference (signal)
    • multipath channels
    • radio receivers
    • RAKE receivers
    • WCDMA downlink transmission
    • intra-cell interference
    • multipath fading channels
    • orthogonality factor
    • spreading codes
    • wideband code-division multiaccess downlink transmission
    • Downlink
    • Fading
    • Interference
    • Land mobile radio cellular systems
    • Loss measurement
    • Multiaccess communication
    • Multipath channels
    • Propagation losses
    • Random variables
    • Reactive power
    • Code division multiaccess
    • land mobile radio cellular systems
    • multiuser channels.


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