一种新颖的GPS多峰值捕获策略  

Novel GPS multiple-peak-value acquisition strategy

作　　者：袁建国[1] 欧松林[1] 刘飞龙[1] 袁艳涛 庞宇[1] 林金朝[1] 

机构地区：[1]重庆邮电大学光纤通信技术重点实验室,重庆400065

出　　处：《中国惯性技术学报》2014年第2期217-220,270,共5页Journal of Chinese Inertial Technology

基　　金：重庆高校创新团队建设计划;国家自然科学基金项目(61371096;61275077);重庆市自然科学基金(2010BB2409)

摘　　要：为了加快全球定位系统(GPS)的捕获速度,提高系统的捕获灵敏度,对GPS系统捕获策略进行了深入地研究。在对其捕获的基本原理和传统的最大值捕获系统进行分析的基础上,提出了一种新颖的GPS多峰值捕获策略。该策略通过多峰值选择减少了系统搜索单元数目,通过增加进入唐检测器的峰值个数来提高捕获灵敏度。利用蒙特卡洛方法进行了仿真分析,仿真结果表明:该新颖策略的捕获时间更短,同时捕获灵敏度比传统的最大值捕获系统要高2.8 dB。总体来说,该新颖策略算法更适用于对GPS弱信号的捕获,也可应用于其他卫星导航系统。In order to accelerate the acquisition speed of the global positioning system (GPS) and improve the acquisition sensitivity of the system, the acquisition strategy of the GPS system is studied. The basic principle of the acquisition system and the traditional maximum acquisition system are analyzed, and a novel GPS multiple-peak-value acquisition strategy is proposed based on these analyses. The novel strategy reduces the system search unit number by selecting the multiple-peak-value and improves the acquisition sensitivity by increasing the number of the peaks entered into the Tang detector. A Monte Carlo method is used in the simulation analysis of the strategy. The simulation analysis shows that the capturing time of the novel strategy becomes shorter, and its acquisition sensitivity is 2.8 dB higher than that of the traditional maximum acquisition system. In general, the algorithm of the novel strategy is more suitable for the acquisition of the GPS weak signal and can also be applied in other satellite navigation systems.

关 键 词：全球定位系统 最大值捕获 多峰值捕获 系统检测概率 弱信号 

分 类 号：TN967.1[电子电信—信号与信息处理]