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This paper reports a preliminary investigation of the influence of the foliage on the radio wave propagation in cellular scenarios. The purpose is to evaluate the dispersion caused by vegetations in mobile radio channels, hence we employed a channel sounder to measure the received signals behind dense vegetations in the rural areas in Kanagawa, Japan. In the measurement campaign the transmitter antenna...
Precision ultra-wideband (UWB) ranging requires accurate estimation of time-of-arrival (ToA). The threshold-based ToA estimation is attractive due to its simplicity. In this paper theoretical closed form expressions of ToA estimation error are derived. A new technique to set the threshold as a function of distance is proposed. ToA estimation error of conventional threshold and distance dependent (DD)...
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