The Gardner Timing Synchronization Of UWB Communication System

UWB technology is a new communication method totally different from the traditional method such as spread-spectrum and general wide-band method. The industry generally expect it as the one candidate solutions of next generation short-range wireless communication and the localization system. Recentlly UWB technology has become one of the hot points of research on wireless communication,and the controversy focus on the standard of the protocol of short -range wireless communication. The most important two characteristics of UWB system are low power spectrum density and the extreme narrow pulse -width. As the band-width increased, the very low pulse energy disperse to several ten even up to 100 dense paths go up, making the signal energy of each path very low, increasing the difficulties to catching and synchronize the signal. So we put the point of UWB system engineering on how to catch the signal fast in low SNR and reduce the complication of the receiver.The research purpose is to improve the efficiency of UWB synchronization system by using the Gardner method timing synchronization.The paper introduce the elements of UWB communication system firstly. The most important part of the paper is Chapter 5, the synchronization element. Traditionally, we use the correlation of the UWB signal to complete the synchronization. While, in this paper, we use Gardner timing recovery to improve the efficiency of UWB system.The loop of this method mainly includes interpolator, NCO control, timing error test and loop filter, resample. Through the simulation of Gardner method timging synchronization of the UWB communication system, we find it really improves the efficiency of the synchronization system greatly.