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Accurate ranging is one of the most promising applications of ultra wideband radio in sensor networks. Amongst variety of ranging methods, threshold-based ranging is a primitive, but robust technique suitable for battery-limited systems. This contribution reports the performance of two threshold-based ranging methods: leading edge detection and search back method. The evaluation utilized real-world measured propagation channels and followed the band plan and the transmit power restriction of the IEEE802.15.4a-2007 standard. Effects of the system bandwidth and the center frequency on ranging performance were analyzed.
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