On Construction of Anti-jam and Multipath Mitigation GNSS receiver by Subspace Projection

Subspace Projection을 이용한 전파방해신호 제거와 다중경로 간섭신호 제거 GNSS 수신기 설계

  • Shin, Jeong-Hwan (Department of Electronics Engineering Konkuk University) ;
  • Heo, Jun (Department of Electronics Engineering Konkuk University)
  • 신정환 (건국대학교 전자공학과) ;
  • 허준 (건국대학교 전자공학과)
  • Published : 2006.12.25

Abstract

This paper considers interference suppression and multipath mitigation in Global Navigation Satellite Systems (GNSSs). We propose an anti-jam GNSS receiver which suppresses interference and multipath by subspace projection method. The resulting interference suppressed and multipath mitigated signal is then process by a beamformer, whose weight vector maximizes the signal-to-noise ratio of the output signal. The enhanced performance is shown by refined cross correlation and beam pattern.

본 논문에서는 다중 안테나를 갖는 위성항법시스템 (GNSS) 수신기에서의 subspace projection을 이용한 전파방해신호 제거와 다중경로 간섭신호 제거에 대한 방법을 기술한다. 우리는 수신기에 들어온 신호를 두 번의 subspace projection을 통해 전파방해신호와 다중경로 간섭신호가 없는 noise subspace로 투영함으로써 GNSS 신호와 noise 만으로 구성된 신호 얻게 되고, 이 신호에 Beamformer를 적용하여 최대의 신호 대 잡음비를 갖는 수신기 출력 신호를 얻게 된다. 컴퓨터 시뮬레이션을 통하여 수신기가 효과적으로 전파방해신호와 다중경로간섭신호를 제거하고 신호 대 잡음비를 최대한으로 증가시킬 수 있음을 보여준다.

Keywords

References

  1. Wei Sun and Moeness G. Amin, 'Maximum Signal-to-noise Ratio GPS Anti-Jam receiver with Subspace Tracking,' IEEE International Conference on Volume 4, pp.18-23, March 2005 https://doi.org/10.1109/ICASSP.2005.1416201
  2. Amin, M.G.; Wei Sun, 'A novel interference suppression scheme for global navigation satellite systems using antenna array,' IEEE Journal on Volume 23, Issue 5, pp.999-1012 May 2005 https://doi.org/10.1109/JSAC.2005.845404
  3. Fante, R.L; Vaccaro, J.J., 'Wideband cancellation of interference in a GPS receive array,' IEEE Transactions on Volume 36, Issue 2, pp.549-564 April 2000 https://doi.org/10.1109/7.845241
  4. Harry L. Van Trees, 'Optimum Array Processing,' Wiley-Interscience, 2002
  5. Frank B. Gross, 'Smart Antennas for Wireless Communications,' McGraw-Hill, 2005
  6. D. Moelker, E. van der Pol, and Y. Bar-Ness, 'Adaptive antenna arrays for interference cancellation in GPS and GLONASS receivers,' IEEE 1996 Position Location and Navigation Symposium, pp.191-198, 1996 https://doi.org/10.1109/PLANS.1996.509077
  7. W. Utschick, 'Tracking of signal subspace projectors,' IEEE Transactions on Signal Processing on Volume 50, no. 4, pp. 769-778 April 2002 https://doi.org/10.1109/78.992119
  8. B. Yang, 'Projection approximation subspace tracking,' IEEE Transactions on Signal Processing on Volume 43, no. 1, pp.95-107 January 1995 https://doi.org/10.1109/78.365290