A downlink pattern optimisation algorithm for a smart antenna in an indoor infrastructure WLAN

Karim M. Nasr, Fumie Costen, Stephen K. Barton

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    This paper presents a downlink pattern optimisation algorithm for a smart antenna optimum combiner operating in an infrastructure Wireless Local Area Network (WLAN) following IEEE802.11a or HIPERLAN/2 standards and serving multiple users through Space Division Multiple Access (SDMA). An indoor infrastructure WLAN scenario with four users communicating with an access point is modeled using a deterministic ray-tracing tool. The performance of the smart antenna system is studied in both the uplink and downlink for the Line of Sight (LOS) and multipath cases to achieve optimum performance in terms of the maximisation of Signal to Interference plus Noise Ratio (SINR) for each user. It is shown that the proposed downlink optimisation algorithm achieves better SINR values for the worst case user compared to the case where uplink optimum weights are used for downlink and that the optimal downlink patterns are not necessary the same as the optimal uplink patterns.
    Original languageEnglish
    Title of host publicationIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC|IEEE Int Symp Person Indoor Mobile Radio Commun PIMRC
    Pages935-939
    Number of pages4
    Volume2
    Publication statusPublished - 2004
    Event2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004 - Barcelona
    Duration: 1 Jul 2004 → …

    Conference

    Conference2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004
    CityBarcelona
    Period1/07/04 → …

    Keywords

    • Downlink Beamforming and Pattern Optimisation
    • Optimum Combining
    • SDMA
    • Sequential Quadratic Programming (SQP)
    • Smart Antennas
    • Spatial Indoor Channel Model
    • WLAN

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