Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
권호 표지
DOI QR코드

DOI QR Code

Cramer-Rao Lower Bound of Effective Carrier-to-noise Power Ratio Estimation for a GPS L1 C/A Signal under Band-limited White Noise Jamming Environments

대역제한 백색잡음 재밍환경에서 GPS L1 C/A 신호를 위한 유효 반송파 대 잡음 전력비 추정치의 CRLB

  • Received : 2014.06.03
  • Accepted : 2014.06.13
  • Published : 2014.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we derive the CRLB (Cramer-Rao Lower Bound) of effective carrier-to-noise power ratio ($C/N_0$) estimation for a GPS (Global Positioning System) L1 C/A (Coarse/Acquisition) signal under band-limited white noise jamming environments. The quality of a received GPS signal is commonly described in terms of its $C/N_0$, implying that the noise is white and thus can be described by scalar noise density. However, if some intentional interference is received to a victim GPS receiver, then the $C/N_0$ is no longer the efficacious performance indicator. The correct and straightforward measurement to analyze the receiving situation is the effective $C/N_0$. In this paper, we consider a band-limited white noise jamming whose bandwidth is 2MHz and is the same as one of the first null-to-null bandwidth of the GPS L1 C/A signal.

Keywords

References

  1. E. D. Kaplan and C. J. Hegarty, Understanding GPS Principles and Applications, 2nd Edition, Artech House, Norwood, MA, 2006.
  2. D. W. Lim, J. M. Kang, and M. B. Heo, "Hybrid TDOA/AOA localization algorithm for GPS jamming," Journal of Institute of Control, Robotics and Systems (in Korean), vol. 20, no. 1, pp. 101-105, Jan. 2014. https://doi.org/10.5302/J.ICROS.2014.13.1943
  3. J. Coffed, "The threat of GPS jamming: The risk to an information utility," Report of EXELIS, Jan. 2014. Online Available: http://www.exelisinc.com/solutions/signalsentry/Documents/ThreatOfGPSJamming_February2014.pdf
  4. GPS World Staff, "LBS market worth $39.87 billion by 2019," GPS World: The Business & Technology of GNSS, Apr. 2014. Online Available: http://gpsworld.com/lbs-market-worth-39-87-billion-by-2019/
  5. L. Scott, "Spoofs, proofs & jamming: Towards a sound national policy for civil location and time assurance," Inside GNSS Magazine, vol. 7, no. 5, pp. 42-53, Sep.-Oct. 2012.
  6. M. Jones, "The civilian battlefield: Protecting GNSS receivers from interference and jamming," Inside GNSS Magazine, vol. 6, no. 2, pp. 40-49, Mar.-Apr. 2011.
  7. J. W. Betz, "Effect of partial-band interference on receiver estimation of C/N0: Theory," in Proc. of the 2001 National Technical Meeting of The Institute of Navigation (ION/NTM 2001), Long Beach, CA, pp. 817-828, Jan. 2001.
  8. S. M. Kay, Fundamentals of Statistical Signal Processing: Volume I Estimation Theory, Prentice Hall PTR, Upper Saddle River, NJ, 1993.
  9. N. S. Alagha, "Cramer-Rao bounds of SNR estimates for BPSK and QPSK modulation signals," IEEE Communications Letters, vol. 5, no. 1, pp. 10-12, Jan. 2001. https://doi.org/10.1109/4234.901810
  10. K. Ramasubramanian, "Performance bounds for carrier-to-noise ratio estimation in GPS receivers," in Proc. of the 2006 National Technical Meeting of The Institute of Navigation (ION/NTM 2001), Monterey, CA, pp. 953-957, Jan. 2006.