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

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


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

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


National Natural Science Foundation of China(61401026)



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).


[1] Kaplan E D, Hegarty C J. Understanding GPS: Principles and Applications. 2nd ed. Norwood: Artech House, 2005. 153--300. Google Scholar

[2] Chang C L, Juang J C. Performance analysis of narrowband interference mitigation and near-far resistance scheme for GNSS receivers. Sign Proc, 2010, 90: 2676-2685 CrossRef Google Scholar

[3] Wang Y Q, Li C, Xu D, et al. A new barycenter code discriminator for multi-access interference. Sci China Inf Sci, 2014, 57: 022311-2685 Google Scholar

[4] Borio D. GNSS acquisition in the presence of continuous wave interference. IEEE Trans Aero Electron Syst, 2010, 46: 47-60 CrossRef Google Scholar

[5] Savasta S, Presti L L, Rao M. Interference mitigation in GNSS receivers by a time-frequency approach. IEEE Trans Aero Electron Syst, 2013, 49: 415-438 CrossRef Google Scholar

[6] Balaei A T, Motella B, Dempster A. A preventative approach to mitigating CW interference in GPS receivers. GPS Solutions, 2008, 12: 199-209 CrossRef Google Scholar

[7] Borio D, Camoriano L, Savasta S, et al. Time-frequency excision for GNSS applications. IEEE Syst J, 2008, 2: 27-37 CrossRef Google Scholar

[8] Lin T, Abdizadeh M, Broumandan A. Interference suppression for high precision navigation using vector-based GNSS software receivers. In: Proceedings of ION GNSS, Portland, 2011. 20--23. Google Scholar

[9] Punchalard R. Mean square error analysis of unbiased modified plain gradient algorithm for second-order adaptive IIR notch filter. Sign Proc, 2012, 92: 2815-2820 CrossRef Google Scholar

[10] Borio D, Camoriano L, Presti L L. Two-pole and multi-pole notch filters: a computationally effective solution for GNSS interference detection and mitigation. IEEE Syst J, 2008, 2: 38-47 CrossRef Google Scholar

[11] Petovello M, Borio D, Dovis F, et al. Impact of notch filtering on tracking loops for GNSS applications. Dissertation for Master Degree. Canada: UCalgary, 2009. 19--55. Google Scholar

[12] Ojeda O A, Grajal J, Lopez R G. Analytical performance of GNSS receivers using interference mitigation techniques. IEEE Trans Aero Electron Syst, 2013, 49: 885-906 CrossRef Google Scholar

[13] Capozza P T, Holland B J, Hopkinson T M, et al. A single-chip narrow-band frequency-domain excisor for a global positioning system (GPS) receiver. IEEE J Solid-State Circ, 2000, 35: 401-411 CrossRef Google Scholar

[14] Balaei A T, Dempster A G. A statistical inference technique for GPS interference detection. IEEE Trans Aero Electron Syst, 2009, 45: 1499-1511 CrossRef Google Scholar

[15] Ward P W. Performance comparisons between FLL, PLL and a novel FLL-assisted-PLL carrier tracking loop under RF interference conditions. In: Proceedings of the 11th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GPS 1998), Nashville, 1998. 783--795. Google Scholar

[16] Foucras M, Ekambi B, Ngayap U, et al. Performance study of FLL schemes for a successful acquisition-to-tracking transition. In: Proceedings of IEEE/ION Position, Location and Navigation Symposium---PLANS, Monterey, 2014. 529--540. Google Scholar

[17] Quinn B G. Estimating frequency by interpolation using fourier coefficients. IEEE Trans Signal Process, 1994, 42: 1264-1268 CrossRef Google Scholar

[18] Provencher S. Parameters estimation of complex multitone signal in the DFT domain. IEEE Trans Signal Process, 2011, 59: 3001-3012 CrossRef Google Scholar

[19] Betz J W, Kolodziejski K R. Generalized theory of code tracking with an early-late discriminator part ii: noncoherent processing and numerical results. IEEE Trans Aero Electron Syst, 2009, 45: 1557-1564 CrossRef Google Scholar

[20] Balaei A T, Dempster A G, Presti L L. Characterization of the effects of CW and pulse CW interference on the GPS signal quality. IEEE Trans Aero Electron Syst, 2009, 45: 1418-1431 CrossRef Google Scholar

[21] Wang Y Q, Gao L, Wu S L. Design of code tracking loop for spacecraft TT&C transponder (in Chinese). J Beijing Univ Posts and Telecommun, 2010, 33: 49-53 Google Scholar

[22] Liu Y Q, Ran Y H, Ke T, et al. Code tracking performance analysis of GNSS signal in the presence of CW interference. Sign Proc, 2011, 91: 970-987 CrossRef Google Scholar

[23] Jang J, Paonni M, Eissfeller B. CW interference effects on tracking performance of GNSS receivers. IEEE Trans Aero Electron Syst, 2012, 48: 243-258 CrossRef Google Scholar

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