Design of High Sensitivity GPS Signal Acquisition Circuit with New Frequency Domain Search Strategy

被引：0
|
作者：
Zou, Deyue [1 ]
Wang, Wenjing [1 ]
Han, Shuai [1 ]
Meng, Weixiao [1 ]
机构：
[1] Harbin Inst Technol, Dept Elect & Informat Engn, Harbin 150006, Peoples R China
来源：
2011 6TH INTERNATIONAL ICST CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA (CHINACOM) | 2011年
关键词：
GPS; weak signal; fast acquisition; FPGA;
D O I：
暂无
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 this paper a GPS signal acquisition circuit is designed based on FPGA and a new GPS signal frequency domain search strategy is proposed and implemented by combining the cyclic shift sweep and DDS sweep. The system frequency domain search speed is improved evidently. And TTFF (time to first fix) can be extremely reduced, with out to much extra hardware costs. As a result, the weak signal acquisition and fast acquisition could be achieved simultaneously. Through hardware testing the sensitivity of the system and the advantages of the new strategy in the search speed is validated.
引用
收藏
页码：925 / 928
页数：4
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