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SCIENCE CHINA Information Sciences, Volume 59, Issue 8: 082201(2016) https://doi.org/10.1007/s11432-015-0763-9

CW interference mitigation in GNSS receiver based on frequency-locked loop

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  • ReceivedMar 13, 2016
  • AcceptedApr 8, 2016
  • PublishedJun 16, 2016

Abstract

Global navigation satellite system (GNSS) receivers are highly susceptible to continuous wave (CW) interference because the received signals are extremely weak. Current interference mitigation techniques mainly use a notch filter or transform domain. This paper proposes a computationally effective algorithm based on a frequency-locked loop (FLL) to mitigate interference in GNSS receivers. The performance of the algorithm is validated through an analysis of the characteristics of the interference reduction filter and interference estimation precision. A Monte Carlo simulation is used to compare the proposed algorithm with various previous algorithms: the adaptive IIR notch filter, adaptive linear-phase FIR filter, and N-sigma DFT algorithm. The simulation results show that the proposed algorithm exhibits excellent interference estimation precision and superior anti-jamming performance compared with the conventional algorithms.


Funded by

"source" : null , "contract" : "2013AA1548"

National High Technology Research and Development Program of China(863)

National Natural Science Foundation of China(61401026)


Acknowledgment

Acknowledgments

This work was supported by National High Technology Research and Development Program of China (863) (Grant No. 2013AA1548), and National Natural Science Foundation of China (Grant No. 61401026).


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