电子学报2012，Vol.40Issue(9)：1817-1821,5.DOI:10.3969/j.issn.0372-2112.2012.09.018
引入微分控制思想的辅助GPS载波跟踪环路设计
Aiding GPS Carrier Tracking Loop with Differential Control
摘要
Abstract
The performance of GPS receiver is affected by carrier tracking loop. Because of the vulnerability of carrier tracking in high dynamic and weak signal environments,a method of strapdown inertial navigation system (SINS) aiding GPS tracking loop utilized differential control cogitation is proposed.Phase locked loop (PLL) utilized in traditional carrier tracking is analyzed, and the control mode could be considered as PI (proportion and integration) control. Then the stable of tracking loop with information aiding is verified, and differential control item is introduced to achieve carrier tracking, where the Doppler prediction is calculated by SINS output and clock error. Simulation results indicate that the proposed method could shorten the bandwidth of tracking loop, relieve the contradiction between thermal noise and dynamic stress, and thus further improve the frequency response and tracking errors in carrier tracking loop.关键词
信号跟踪/多普勒频移/PLL/微分控制Key words
carrier signal tracking/Doppler frequency shift/phase locked loop (PLL)/differential control分类
交通工程引用本文复制引用
高帅和,赵琳,郭丽姝..引入微分控制思想的辅助GPS载波跟踪环路设计[J].电子学报,2012,40(9):1817-1821,5.基金项目
国家自然科学基金(No.61001155,No.60974104) （No.61001155,No.60974104）
