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GNSS IF Signal Simulation Considering Oscillator Phase Noise

Published online by Cambridge University Press:  05 February 2018

Bing Xu  and
Lei Dou
Bing Xu
Affiliation:
(National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China)
Lei Dou*
Affiliation:
(National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China)
*
(E-mail: douleijs@163.com)
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Abstract

Oscillator phase noise has a negative effect on the tracking performance of Global Navigation Satellite System (GNSS) receivers. To provide GNSS software receivers with real test environments, this paper proposes a method to simulate the GNSS Intermediate Frequency (IF) signal, taking the oscillator phase noise effect into consideration. The oscillator parameters are first measured via a pseudolite transmitter and receiver system. According to the measured oscillator parameters, an oscillator-induced frequency fluctuation is then generated, and added to the digital IF signal. Further simulation experiments are conducted that attempt to measure the oscillator phase noise effect on a second-order Phase Lock Loop (PLL) performance. Results indicate that the IF signal simulator considering the oscillator phase noise is able to provide software receivers with real signal dynamics, helping to evaluate the performance of signal processing algorithms on a software platform.

Keywords

GNSSOscillator phase noiseSimulation fidelitySoftware receiver
Type
Research Article
Information
The Journal of Navigation , Volume 71 , Issue 4 , July 2018 , pp. 805 - 820
Copyright
Copyright © The Royal Institute of Navigation 2018 

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