Effect of Beampattern on Directional Beacon based Position Location Algorithm for UWB Systems

Motivated from the results of previous studies, the authors aim to evaluate the effect of antenna beam pattern on the performance of directional beacon based position location algorithm in this paper. They make use of earliest arrivals to detect the line of sight components. Directional beacons are generated using four element Uniform Linear Antenna array (ULA) at the transmitting nodes. To achieve narrow beam width, they design the beam pattern using Dolph-Chebyshev method that provides a way to trade off beam width for sidelobes level in an optimum manner. Simulation results show that the minimum error in time estimation (consequently position location) does not occur at the minimum beam width.