| Summary: | 碩士 === 淡江大學 === 電機工程學系碩士班 === 94 === A comparison of ultra-wideband (UWB) communication characteristics for six different geometrical shapes is investigated. These six shapes include the straight shape corridor with rectangular cross section, the straight shape corridor with arched cross section, the curved shape corridor with rectangular cross section, the curved shape corridor with arched cross section, L-shape corridor, and T-shape corridor. The impulse responses of these corridors are computed by applying shooting and bouncing ray/image (SBR/Image) techniques. By using the impulse response of these multi-path channels, the mean excess delay, root mean square (RMS) delay spread, and the number of multi-path arrivals that are within 10 dB of the peak multi-path arrival(NP10dB), and number of paths required to meet the 85% energy capture threshold(NP(85%)) for these six corridors could be obtained. Numerical results show that the RMS delay spread for the arched cross section corridors are smaller than those for the rectangular cross section corridors regardless of the shapes. And the RMS delay spread for the T-shape corridor is the largest among others.
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