Hopping Pilot Performance Analysis of PPM-TH and PAM-DS UWB Radio Link Based on Coherent Correlation Detection

In this paper, the hopping pilot performances analysis of PPM-TH and PAM-DS UWB radio link based on coherent correlation detection (CCD) is provided for very high data rates over short distance. The receiver can take advantage of multipath signals by creating a bank of correlators, one for each multipath signal. The primary disadvantage of the CCD receiver is imperfect correlations resulting from distorted input pulse. To correct this problem, an adaptive equalizer with perfect timing, exponential, and uniform timing offsets may be adopted. The CCD receiver can be combined with the template match detection technique and performs a matched filter operation with a series of template waveforms. Simulation results show that the performance of PPM-TH is less robustness to that of PAM-DS in multipath environments