[1] Zhu Xuefen, Chen Xiyuan, Li Zigang,. Architecture design of GPS software receiver and implementationof its acquisition algorithm with fine frequency estimation [J]. Journal of Southeast University (English Edition), 2008, 24 (1): 38-41. [doi:10.3969/j.issn.1003-7985.2008.01.009]

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Architecture design of GPS software receiver and implementationof its acquisition algorithm with fine frequency estimation()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

24

Issue:

2008 1

Page:

38-41

Research Field:

Instrument Science and Technology

Publishing date:

2008-03-30

Info

Title:

Architecture design of GPS software receiver and implementationof its acquisition algorithm with fine frequency estimation

Author(s):

Zhu Xuefen;  Chen Xiyuan;  Li Zigang

School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China

Keywords:

GPS software receiver;  acquisition algorithm;  circular correlation;  fine frequency estimation

PACS:

U666.1

DOI:

10.3969/j.issn.1003-7985.2008.01.009

Abstract:

The design of a global positioning system(GPS)software receiver is introduced.This design uses the concept of software radio, and it consists of the following parts:front-end, acquisition, tracking, synchronization, navigation solution and some assisting modules.In the acquisition module, the acquisition algorithm based on circular correlation is utilized.The input data and the local code are converted into the frequency domain by means of the fast Fourier transform(FFT).After performing circular correlation, the initial phase of the C/A code can be obtained and the carrier frequency can be found in 1 kHz frequency resolution, which is too coarse to use for the tracking loop.In order to improve the frequency resolution, the fine frequency estimation through a phase relationship is then achieved, by which, the frequency resolution is improved dramatically.Experiments show that the inaccuracy of the carrier frequency can be estimated within a few hertz by the fine frequency estimation method, and the fine frequency attained can be directly used for the tracking loop.

References:

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[2] Rinder P, Bertelsen N.Design of a single frequency GPS software receiver [D].Alborg:Alborg University, 2004.
[3] Lei Dong.IF GPS signal simulator development and verification [D].Alberta:University of Calgary, 2003.
[4] Krasner N, Norman F.GPS receiver and method for processing GPS signals:US, 5884214[P].1999-03-16.
[5] Zhang Shouxin, Huang Xuede.GPS technique and applica-tion [M].Beijing:National Defence Industry Press, 2004:1-23.(in Chinese)
[6] Kaplan Elliott, Hegarty Christopher.Understanding GPS:principles and applications[M].2nd ed.London:Artech House Press, 2006:153-241.
[7] Yang Jun, Wu Qisheng.GPS principles and its Matlab simulation [M].Xi’an:Xidian University Press, 2006:105-181.(in Chinese)
[8] Zhang Yong, Lin Baojun, Xu Zhihan.Study on simulation of signal search and acquisition in GPS software receiver [J].Journal of System Simulation, 2006, 18(9):2646-2649.(in Chinese)
[9] Dai Zhijun, Liu Lintao, Xu Houze, et al.On acquisition algorithm for GPS software receiver [J].Journal of Geodesy and Geodynamics, 2006, 26(3):106-110.(in Chinese)
[10] Misra P, Enge P.Global positioning system:signals, measurements, and performance[M].2nd ed.Lincoln:Ganga-Jamuna Press, 2006:431-549.

Memo

Memo:

Biographies: Zhu Xuefen(1983—), female, graduate; Chen Xiyuan(corresponding author), male, doctor, associate professor, chxiyuan@seu.edu.cn.
Foundation items: Program for New Century Excellent Talents in University(No.NCET-06-0462), Excellent Young Teacher Foundation of Southeast University(No.4022001002).
Citation: Zhu Xuefen, Chen Xiyuan, Li Zigang.Architecture design of GPS software receiver and implementation of its acquisition algorithm with fine frequency estimation[J].Journal of Southeast University(English Edition), 2008, 24(1):38-41.

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