摘要
超宽带通信技术近年来受到广泛关注,其中同步问题系统性能的关键因素。研究了超宽带通信系统的定时同步问题,提出了一种粗同步与细同步相结合的同步算法,以TH-UWB-PAM信号系统为例,首先利用脏模板理论进行粗捕获,完成帧一级的同步,然后在捕获的基础上利用滑动相关完成细同步,通过对加性高斯白噪声(AWGN)和超宽带(UWB)多径信道进行了同步算法性能仿真,实验结果表明了该同步算法的可行性,能够获得复杂度和同步性能的良好折中,且在一定信噪比条件下能获得良好的同步精度。
UWB （ultra wideband） communication technology now receives much attention from the field of academic research,and its synchronization is the critical factor for the system performance.This paper descusses the timing and synchronization in TH-UWB-PAM communication system.A novel synchronization algorithm is proposed,in which the dirty template theory is designed to implement the coarse acquisition,and thus the frame synchronization is realized,then the slip-correlation operation is used to realize the fine synchronization.The experiments in AWGN and UWB multipath channel indicate that the proposed algorithm is feasible and efficient,a good tradeoff of between complexity and synchronization performance could be reached,and a high timing accuracy obtained in certain SNR.
出处
《通信技术》
2010年第9期35-37,40,共4页
Communications Technology
关键词
超宽带
同步算法
捕获
跟踪
ultra wideband
synchronization algorithm
acquisition
tracking
