Fast algorithm with improved circular correlation method for GPS signal acquisition

被引：0
|
作者：
Li, Yanmin [1 ]
Yi, Qingming [1 ]
Shi, Min [1 ]
机构：
[1] Jinan Univ, Dept Elect Engn, Guangzhou 510632, Guangdong, Peoples R China
来源：
MECHATRONICS AND INTELLIGENT MATERIALS III, PTS 1-3 | 2013年 / 706-708卷
关键词：
Weak GPS signal; fast acquisition; serial sliding; circular correlation;
D O I：
10.4028/www.scientific.net/AMR.706-708.794
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In order to improve acquisition speed and carrier frequency accuracy, a fast algorithm to acquire GPS signal is proposed. Signal-to-Noise Ratio is improved by coherent integration and non-coherent integration. The advantages of serial sliding algorithm and circular correlation algorithm are combined to achieve high carrier frequency accuracy. Removing the information of C/A code makes serial search from two-dimensional to one-dimensional to achieve less computation. Simulation shows weak signal of -30dB S/N is successfully acquired. The error of carrier frequency is controlled within 50Hz. So the data processing efficiency for the tracking loop is greatly increased.
引用
收藏
页码：794 / 797
页数：4
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