基于ML和相关器的超宽带系统同步捕获的实现  

Realization of Timing Acquisition for Ultra-Wideband System Based on ML Algorthim and Correlator

作　　者：张学毅[1] 梁建华[1] 周春临[1] 

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412000

出　　处：《通信技术》2008年第8期116-119,共4页Communications Technology

摘　　要：超宽带(UWB)以其传输速率高、抗多径和抗干扰能力强等优点,在短距多址无线通信中良好的应用前景而引起广泛研究。文章提出了一种基于ML的UWB同步接收方案,采用相关器与ML估计准则结合在一起实现同步。仿真结果表明:捕获的导频序列M越长和估计的支路数越多,误码率就越低。Ultra-wideband（UWB）communication has been the subject for extensive research owing to its high rate and getting rid of strongly multipath interference, particularly potential applications in short-range multiple access wireless communications. This paper proposes a timing acquisition scheme for UWBbased on maxmium likelihood（ML） criterion. The correlator and ML criterio are integrated in order to realize synchronization. The simulation results show that the longer the sequence of guiding frequency is and the more the estimated branch is, the lower the bit error rate（BER） is.

关 键 词：超宽带 同步 ML准则 相关器 

分 类 号：TN183[电子电信—物理电子学]