NDLI: A software-based receiver sampling frequency calibration technique and its application in GPS signal quality monitoring

Content Provider	IEEE Xplore Digital Library
Author	Yanhong Kou Xingyun Zhou Morton, Yu. Akos, D.M.
Copyright Year	2010
Description	Author affiliation: University of Colorado- Boulder, USA (Akos, D.M.) \|\| Beihang University, China (Yanhong Kou; Xingyun Zhou) \|\| Miami University, USA (Morton, Yu.)
Abstract	This paper has investigated the sampling frequency error impact on the signal processing in a software-correlator based GPS receiver as well as the periodic averaging technique in a pre-correlation GPS signal quality monitor. The refined signal model of receiver processing in the presence of clock error is established as the foundation of the performance analyses. A software-based method is developed to accurately calibrate both the digital IF and the sampling frequency simultaneously. The method requires no additional hardware other than the GPS receiver RF front end output samples. It enables inline calibration of the receiver measurements instead of complicated post-processing. The performance of the technique is evaluated using simulated signals as well as live GPS signals collected by several GPS data acquisition equipments, including clear time domain waveforms/eye patterns, amplitude probability density histograms, Power Spectrum Density (PSD) envelopes, and correlation-related characteristics. The results show that we can calibrate the sampling frequency with an accuracy resolution of $10^{−9}$ of the true sampling frequency online, and the pre-correlation SNR can be potentially improved by 39dB using periodic averaging.
Starting Page	718
Ending Page	727
File Size	1035440
Page Count	10
File Format	PDF
ISBN	9781424450367
ISSN	21533598
DOI	10.1109/PLANS.2010.5507224
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sampling methods Frequency Calibration Application software Global Positioning System Monitoring Signal sampling Signal processing Clocks Performance analysis
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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