In radiolocation, an ultra wideband (UWB) directional beacon provides several advantages, such as enhanced range and link performance, reduced interference, and increased system capacity. Previous research analyzed the location error with a directional beacon in a Rayleigh channel model under the assumption of the existence of the line-of-sight (LOS) path and detection of the first multipath (Nasipuri, A. and Li, K., ACM Symp. on Wireless Sensor Network Applications, p.105-11, 2002). We investigate the location error for a UWB system based on directional beacons in a UWB multipath environment. For simulation, we locate four rotating directional beacons at the corners of a 100 m × 100 m square and set the SNR=30 dB. Our results indicate that the mean location error is less than 1 cm under the existence of LOS paths for all four beacons, and 5.6 cm if one beacon does not have a LOS path.
展开▼
