PN code acquisition algorithm in DS-UWB system based on threshold comparison criterion  

作　　者：Qi Lina Gan Zongliang Zhu Hongbo 

机构地区：[1]Coll. of Telecommunications & Information Engineering, Nanjing Univ. of Posts and Telecommunication, Nanjing 210003, P.R. China

出　　处：《Journal of Systems Engineering and Electronics》2009年第1期216-222,共7页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (60572024);the Doctoral Fund of the Ministry of Education of China (20050293003);the National Basic Research Program (2007CB310607)

摘　　要：The direct sequence ultra-wideband （DS-UWB） is a promising technology for short-range wireless communications. The UWB signal is a stream of very low power density and ultra-short pulses, and the great potential of DS-UWB depends critically on the success of timing acquisition. A rapid acquisition algorithm for reducing the acquisition time of the coarse pseudo-noise （PN） sequences is proposed. The algorithm utilizes the auxiliary sequence and bisearch strategy based on the threshold comparison criterion. Both theoretical analysis and simulation tests show that with the proposed search strategy and simple operations over the symbol duration at the receiver, the proposed algorithm can considerably reduce the acquisition time even as it maintains the PN sequence acquisition probability in the DS-UWB system over the dense multipath environment.The direct sequence ultra-wideband （DS-UWB） is a promising technology for short-range wireless communications. The UWB signal is a stream of very low power density and ultra-short pulses, and the great potential of DS-UWB depends critically on the success of timing acquisition. A rapid acquisition algorithm for reducing the acquisition time of the coarse pseudo-noise （PN） sequences is proposed. The algorithm utilizes the auxiliary sequence and bisearch strategy based on the threshold comparison criterion. Both theoretical analysis and simulation tests show that with the proposed search strategy and simple operations over the symbol duration at the receiver, the proposed algorithm can considerably reduce the acquisition time even as it maintains the PN sequence acquisition probability in the DS-UWB system over the dense multipath environment.

关 键 词：direct sequence ultra-wideband pseudo-noise code auxiliary sequence synchronization. 

分 类 号：TN914.4[电子电信—通信与信息系统] TN914.42[电子电信—信息与通信工程]