东南大学学报（自然科学版）Issue(5)：946-951,6.DOI:10.3969/j.issn.1001-0505.2014.05.013
强跟踪滤波器在高动态G PS信号跟踪中的应用
Strong tracking Kalman filter loop applied for high dynamic GPS signals
摘要
Abstract
A novel linear STKF(strong tracking Kalman filter)-based GPS (global positioning sys-tem)tracking-loop estimator is developed to resolve the losing lock problem of GPS IF (intermediate frequency)signal tracking loop in high dynamic environment.Code phase detector and Carrier wave phase detector are used as the observations of the STKF.The code phase errors,carrier phase errors, Doppler shift errors and the rate of change of Doppler shift errors are estimated with the STKF.The estimation results of the STKF are responded to the tracking-loop NCOs (numerically controlled os-cillator)to generate accurate local carrier and local code.The simulation results indicate that,in the case that the carrier-to-noise ratio is 45 dBHz,the STKF tracking loop works well even if the change rate of Doppler shift reaches 5 .0 kHz/s,but the traditional tracking loop based on PLL (phase lock loop)/DLL (delay locked loop)and loop filters may lose lock at 1 .8 kHz/s.关键词
卡尔曼滤波器/强跟踪卡尔曼滤波器/GPS/跟踪/高动态Key words
Kalman filter/strong tracking Kalman filter (STKF)/GPS (global positioning sys-tem)/tracking/high dynamic分类
天文与地球科学引用本文复制引用
王熙赢,陈熙源..强跟踪滤波器在高动态G PS信号跟踪中的应用[J].东南大学学报（自然科学版）,2014,(5):946-951,6.基金项目
国家自然科学基金资助项目（50975049）． （）
