Design of high sensitivity GPS signal acquisition circuit with new frequency domain search strategy

Author

Zou, Deyue ; Wang, Wenjing ; Han, Shuai ; Meng, Weixiao

Author_Institution

Dept. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China

fYear

2011

fDate

17-19 Aug. 2011

Firstpage

925

Lastpage

928

Abstract

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.

Keywords

Global Positioning System; field programmable gate arrays; frequency-domain analysis; logic design; signal detection; DDS sweep; FPGA; cyclic shift sweep; hardware testing; high sensitivity GPS signal acquisition circuit design; system frequency domain search speed strategy; weak signal acquisition; Correlation; Global Positioning System; Hardware; Search problems; Signal resolution; Time frequency analysis; FPGA; GPS; fast acquisition; weak signal;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking in China (CHINACOM), 2011 6th International ICST Conference on

Conference_Location

Harbin

Print_ISBN

978-1-4577-0100-9

Type

conf

DOI

10.1109/ChinaCom.2011.6158288

Filename

6158288