Effective timing synchronization scheme for DHTR UWB receivers
Huang Taijung
Longyan University, School of Mathematics and Information Engineering
DOI: https://doi.org/10.59429/esta.v11i4.8472
Keywords: Synchronization; Multipath; Delay-Hopped Transmitted-Reference(DHTR); Template signal
Abstract
Ultrawideband (UWB) wireless communication systems are ideally suited to short-distance and highdata-rate wireless communications. UWB systems have a low average transmission power, and therefore ensure a fixed synchronization error between the transmitted and received ends. In order to reduce multipathinterference, UWB systems are generally implemented using Rake receivers, for which the delay time and attenuated amount of each transmitted route must be known in advance. In the present study, the complexity of Rake receivers with a large number (e.g., >10) of“fingers” is reduced by using the delay-hopped transmitted-reference (DHTR) method, which correlates the delayed signal with the original signal,and therefore avoids the need for a template signal. The synchronization performance of the proposed DHTR receiver is analyzed both theoretically and by means of numerical simulations. An effective timing synchronization scheme, designatedas “parallel signal acquisition with shared looped delay-line” (PS-SLD), is then proposed. The simulation results show that the proposed synchronization scheme achieves a higher detection probability and a lower normalized MSE than the traditional timing dirty template (TDT) algorithm in multipath environments with a single user.
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