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28 April 2004 An improved multiple access design for UWB communication system
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Proceedings Volume 5284, Wireless Communications and Networks; (2004)
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
The multiple access interference is the main reason that limits the UWB system capacity. The flexibility of pulse selection is a prominent property which is different from the conventional communications. In this paper, a new multiple-access scheme: Waveform Division Multiple Access (WDMA) based on the orthogonal wavelet function shapes is presented. In this scheme, the scaling function φ(t) and the wavelet function ψ(t) representing the UWB pulses are equally assigned to different users to realize multiple access. Because of the better orthogonality of φ(t) and ψ(t), the multiuser interference will be suppressed more effectively. The performance analysis and simulation results show that WDMA system can accommodate more users than TH-PPM UWB and DS-BPSK UWB system.
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Xuetian Zhu, Tianle Deng, and Zheng Zhou "An improved multiple access design for UWB communication system", Proc. SPIE 5284, Wireless Communications and Networks, (28 April 2004);

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