An Improvement for ML and GLRT Based UWB TR Receivers

Abstract

For ultra wideband transmitted reference (UWBTR)systems Maximum-likelihood (ML) and generalizedlikelihood ratio test (GLRT) are two major methods toestimate a correlation template in receivers. In this paperthese methods will be generalized for pulse positionmodulation (PPM) and will be compared with pulse amplitudemodulation (PAM). We also improve these methods by using abetter cutoff for ML receivers to achieve about 3dBperformance gain, and presenting a new improved GLRTreceiver which can ameliorate performance of the GLRTreceiver by 1dB when PPM and PAM signals are employed.