Ultra-wideband positioning technology based on PSM modulation

In order to improve accuracy of the delay time estimate and the performance of noise ratio, complete the task of location and communication at the same time, a new method of pulse shaped modulation (PSM) is introduced in this paper. This method uses different orthogonal waveform to show the data. It is presented on the basis of orthogonaity and no direct component characteristics of modified Hermite polynomial. The result of analysis indicates that the UWB system which uses the method can combine the training sequence and information signals into one signal to transmit and improve the performance of UWB system.