突发扩频信号码相位精确估计的卡尔曼滤波方法  

Kalman Method for Code Phase Estimate of Burst Spread Spectrum Signal

作　　者：刘洪[1] 程剑[2] 刘良凯[1] 周雄林[3] 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院训练部 [3]解放军理工大学通信工程学院研究生3队

出　　处：《军事通信技术》2012年第2期16-20,共5页Journal of Military Communications Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA12Z307)

摘　　要：文章首先分析了延迟锁定环在突发模式下码相位测量精度低的问题,然后建立了用于扩频信号伪码相位估计的卡尔曼滤波模型,并分析了该卡尔曼滤波器最优运行和提高测量精度的条件,提出用宽带延迟锁定环引导卡尔曼滤波的方法对突发扩频信号的码相位进行精确估计。通过仿真对比了在突发扩频信号下该方法与单独使用延迟锁定环的性能情况。The problem of low estimation accuracy of code phase in burst mode was analyzed. A kalman filtering model for estimating code phase was built and the optimization condition for the filter to improve the estimation accuracy was analyzed. Based on the above analysis, a new method using wide-bandwidth DLL dragged kalman filtering was proposed to estimate burst PN code phase. Finally the performance of this new algorithm on condition of burst spread spectrum signal was compared with that of a pure DLL through simulation.

关 键 词：突发扩频信号 码相位精确估计 卡尔曼滤波 延迟锁定环 

分 类 号：TN82[电子电信—信息与通信工程]