Fast fine acquisition algorithm of GPS receiver aided by INS information

作     者：Lufeng Zhu Chunxi Zhang Zhiqiang Ma 

作者机构：School of Instrumentation & Optoelectronics Engineering Beihang University Beijing 100191 P. R. China 

出 版 物：《Journal of Systems Engineering and Electronics》 (系统工程与电子技术（英文版）)

年 卷 期：2011年第22卷第2期

页      面：300-305页

核心收录：

学科分类：081802[工学-地球探测与信息技术] 08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0818[工学-地质资源与地质工程] 0804[工学-仪器科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

主　　题：inertial navigation system (INS) aid spectrum zooming acquisition time global position system (GPS) receiver. 

摘      要：Acquisition time of global position system （GPS） receiver, which is the main factor contributes to time to first fix （TTFF）, can be shortened by estimating the Doppler frequency shift through external inertial navigation system （INS） information and almanac data and reducing the searching area. The traditional fast acquisition is analyzed, the fast acquisition of the GPS receiver aided is presented by INS information, and the signal is fine captured by spectrum zooming. Then the algorithm is simulated by sampled GPS intermediate frequency （IF） signal and the result verifies that this acquisition can dramatically improve the capability of GPS receiver and reduce its acquisition time.