基于近完美序列的PAM-TH-UWB信号的同步捕获算法研究  

Almost Perfect Sequence-based Timing Acquisition Algorithm for PAM-TH-UWB

作　　者：欧剑[1] 刘传辉[1] 

机构地区：[1]绵阳职业技术学院信息工程系,绵阳621000

出　　处：《核电子学与探测技术》2014年第11期1365-1370,共6页Nuclear Electronics & Detection Technology

摘　　要：针对超宽带信号UWB(ultra-wideband)的同步问题,提出基于近完美序列APS(Almost perfect sequence)的脉冲幅度调制PAM的同步捕获算法APA-UWB-AS。APA-UWB-AS算法利用APS的特性,设计一种训练序列,并结合最小二乘算法LS获取PAM-UWB的同步。在实施过程中,APAUWB-AS算法只需以比特速率采样,再进行简单的相关运算,从而简单了系统,降低系统的运算量。针对密集多径信道建立仿真模型,仿真结果表明提出的APA-UWB-AS算法能够快速的获取同步,当训练序列周期为24时,具有良好的同步估计的均方误差MSE和系统误码率,并逼近理想同步的环境下的误码率。For the timing acquisition in ultra- wideband systems,APA- UWB- AS（ Almost perfect sequence based PAM- TH- UWB timing acquisition） algorithm is proposed in the paper. Using the characteristics of the APS（ Almost perfect sequence）,the training sequence is designed in APS- UWB- AS scheme,with Least Square Estimation（ LSE）,the timing acquisition is done. The algorithm can realize timing acquisition at receiver using simple correlation operations over the samples at the symbol rate,which reduces considerably implementation complexity and acquisition time. The acquisition performance in the multipath channel are also provided in term s of simulation,When the training sequence cycle is 24,the scheme achieves a high synchronization performance and the bit- error- rate（ BER）,which is close to that of the case with perfect.

关 键 词：超宽带 同步捕获 脉冲幅度调制 最小二乘(Ls) 近完美序列 

分 类 号：TN915[电子电信—通信与信息系统]