Location Technique In UWB System

Wireless location in wireless communications networks has been studied extensively in recent years, and Ultra wideband (UWB) impulse radio has proved to be a promising technology suitable for high-resolution ranging in a dense multipath environment. This thesis presents an investigation of time-domain super-resolution time-of-arrival (TOA) estimation employing transmitted-reference TR-UWB signals for indoor multipath location. A simple and effective TOA estimation based on time of arrival of the first multipath under an indoor line-of-sight (LOS) multipath environment is presented, and the simulation is conducted using MATLAB and IEEE standard indoor multipath models. The performance of proposed method is evaluated. In chapter 7, a RSSI based positioning technique via UWB signal is simulated and the performance is evaluated. Chapter 8 is an application of trail smoothing using L filter. An improvement of L filter is proposed, and the performance is evaluated, compared with known constant gain filters based on several movement models. Further possible considerations is considered and discussed.