Conditions and performance of ideal RAKE reception for ultra-wideband signals in lognormal fading channels

J. Zhang*, Rod A. Kennedy, Thushara D. Abhayapala

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    In this paper, the conditions and performance of ideal RAKE reception for time hopping Ultra-Wideband (UWB) investigated. Owing to the complex propagation phenomena and specific-structure of UWB signals, new problems relevant to the operation of RAKE receivers arise. This motivates us to reconsider the conditions under which a RAKE receiver can work effectively with negligible interference between fingers. Key findings are that the conditions not only relate to the property of time hopping codes, but also modulation methods. An analytical technique is introduced to derive explicit expressions of RAKE performance for various combining methods for a lognormal fading channel. Numerical results show that RAKE reception can largely improve the performance, and equal gain combining has comparable performance to maximum ratio combining.

    Original languageEnglish
    Pages (from-to)193-200
    Number of pages8
    JournalInternational Journal of Wireless Information Networks
    Volume10
    Issue number4
    DOIs
    Publication statusPublished - Oct 2003

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