航空兵器Issue(6)：29-35,7.
GPS接收机跟踪环的抗干扰性能研究与分析
Research and Analysis on Anti-Interference Performance of Tracking Loop for GPS Receiver
摘要
Abstract
The tracking loops of GPS receivers are easy to lose lock due to outside interference in complex electromagnetic environments, which causes the GPS receivers fail to demodulate the navigation messages and do positioning calculations. The influence of external interference on GPS receiver tracking loop performance is analyzed quantitatively. On the basis of measuring errors of the carrier tracking loop and the C/A code tracking loop, the relation between carrier-to-noise power density ratio and loop parameters is researched. Using the interference signal link model established in this paper, the effective interferential range of various jamming power on tracking loops is studied quantitatively. The simulation results based on FPGA development platform indicate that the optimal loop bandwidth can be obtained by minimizing the sum of thermal noise vibration and dynamic stress error and it can improve the measurement accu- racy and enhance the anti-interference ability.关键词
GPS接收机/载波跟踪/C／A码跟踪/抗干扰/载噪比Key words
GPS receiver/carrier tracking/C/A code tracking/anti-interference/carrier-to-noisepower density ratio分类
信息技术与安全科学引用本文复制引用
宋帅,王新龙..GPS接收机跟踪环的抗干扰性能研究与分析[J].航空兵器,2011,(6):29-35,7.基金项目
国家自然科学基金 （）
航空科学基金 （）
