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Ultra WideBand-Impulse Radio (UWB-IR) technology is an ideal candidate for wireless networks that can be utilized for short-range, high-speed, low power, and low cost indoor applications. This paper discusses the effects of the human body shadowing on the UWB propagation based on the extended Friis' transmission formula. The matched filter is considered at the receiver side to maximize the SNR for evaluation. The UWB transmission gains are presented. The technique gives very accurate results and is very useful for design and evaluation of UWB impulse radio transmission systems.
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