现代电子技术2011，Vol.34Issue(15)：74-78,5.
新的微弱GPS信号快速捕获算法
A Fast Acquisition Algorithm for Weak GPS Signal
郭利超 1廉保旺 2马朝霞1
作者信息
- 1. 西北工业大学电子信息学院,陕西西安710129
- 2. 太原卫星发射中心,山西太原036300
- 折叠
摘要
Abstract
The fast effective C/A code acquisition algorithm for weak signal has an important position in the high-sensitivity GPS receiver, and is also a key for the practical application of the high-sensitivity GPS receiver. According to the statistical characteristic analysis of the acquired signal relative amplitude values, this paper shows the primary cause that is difficult to acquire the weak GPS signal. The main advantages and disadvantages of the current data accumulation are discussed. Based on the analyses of GPS system and the navigation data format, a weak GPS signal acquisitionalgorithm is put forward in combination with the fast coherent accumulation and satellite position prediction. Theoretical analysis and simulation results show that the algorithm is feasible and can catch the satellite signal when SNR is equal to -43 dB. Field testing data indicates that the new algorithm can remarkably improve the ability to acquire more satellite signals.关键词
全球卫星定位系统/微弱信号捕获/帧同步码/相干累积Key words
GPS/ weak signal acquisitions frame synchronization code/ coherent accumulation分类
信息技术与安全科学引用本文复制引用
郭利超,廉保旺,马朝霞..新的微弱GPS信号快速捕获算法[J].现代电子技术,2011,34(15):74-78,5.
