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    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/82996

    題名: Ultra-wideband Outdoor Communication Characteristics with and without Traffic
    作者: Chiu, Chien-Ching;Chen, Chien-Hung;Liao, Shu-Han;Tu, Ting-Chieh
    貢獻者: 淡江大學電機工程學系
    關鍵詞: UWB;multipath;BER;outage probability;RMS delay spread
    日期: 2012-03-07
    上傳時間: 2013-03-13 03:09:31 (UTC+8)
    出版者: Heidelberg: SpringerOpen
    摘要: The BER performance for ultra-wideband (UWB) outdoor communication in LOS and NLOS environments with and without traffic is investigated. We obtain the impulse responses of the UWB outdoor environment by both 2.5D SBR-Image method and inverse Fourier transform techniques. The 2.5D SBR-Image method is first considered for two-dimensional environment simulated without heights of obstacles by ray tubes. Then, heights of the obstacles are taken into consideration between the transmitters and receivers. If the height of ray is lower than that of obstacles, the ray is neglected for the receivers. This effectively reduces the simulating time. By using the impulse response of multipath channels, the BER performance for binary pulse amplitude modulation communications over the radio UWB system is evaluated. We have performed computer simulations in LOS and NLOS environments with and without traffic in dense building areas. Numerical results have shown that the multipath effect caused by moving vehicles in the outdoor LOS and NLOS environments has a great impact on BER performance. Rake receivers are used to improve the outage probability. The relationship between traffic and BER performance is investigated; meanwhile, the characteristics of LOS and NLOS outdoor UWB environments are analyzed. Our investigation results can help improve planning and design of the UWB system.
    關聯: EURASIP Journal on Wireless Communications and Networking 2012(92), (14pages)
    DOI: 10.1186/1687-1499-2012-92
    顯示於類別:[電機工程學系暨研究所] 期刊論文


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