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An Accurate Direction Finding Technology Using a Phase Comparison and Time Difference of Arrival

위상비교와 시간차를 복합한 정밀 방향탐지 기술

  • Lim, Joong-Soo (Division of Information Communication, Baekseok University)
  • 임중수 (백석대학교 정보통신학부)
  • Received : 2011.08.22
  • Accepted : 2011.11.10
  • Published : 2011.11.30

Abstract

In this paper, we proposed a new direction finding(DF) technology using TDOA(time-difference of arrival) and PDOA(phase difference of arriving signal) method. The proposed technology has a good DF accuracy without DF ambiguity. TDOA or PDOA technology is used to the most of intelligence systems in 21 century. The principle of TDOA is to receive a signal with two parallel antennas, measure the time difference of arrival signal, and converse the time difference to the direction of incident signal. Those technology make a DF system small size but the DF accuracy is low into short antenna installation distance. The principle of PDOA is similar to TDOA except measuring the phase difference of arrival signal, These technology get a good DF accuracy in short antenna installation distance but have a DF ambiguity. The proposed DF method is simulated into DF system operation environment with noise, and has a good DF accuracy.

본 논문에서는 배열안테나에 도달한 전파의 위상차와 시간차를 이용하여 방향탐지 정확도가 높고 방향모호성이 없는 새로운 방향탐지 기술을 제안하였다. 21세기의 전자정보시스템에는 배열 안테나에 도달하는 신호의 위상차를 이용하는 위상차 방향탐지 방식 또는 배열안테나에 도달하는 신호도착 시간차를 이용하는 방향탐지 방식이 주로 사용되고 있다. 시간차를 이용하는 방식은 장치구성은 간단하지만 좁은 안테나 배치공간에서는 방향탐지 정확도가 나쁘고, 위상차 방식은 좁은 안테나 배치공간에서도 방향탐지 정확도는 높으나 방향모호성이 발생한다. 본 논문에서는 두 방식의 장점을 결합한 방향탐지 정확도가 높고 방향모호성이 없는 새로운 방향탐지 기술을 제안하였으며, 실제 운용환경과 유사한 잡음환경에서 방향탐지 오차를 모사하여 제안된 방식의 우수성을 입증하였다.

Keywords

References

  1. Filippo Neri, Introduction to electronic Defense Systems (2nd Edition), Artech House, Boston, 2001.
  2. Kumar Gaurav Chhokra, et al., Accuracy Enhancements for TDOA Estimation on Highly Resource Constrained Mobile Platforms, Technical Report, ISIS-03-402, Vanderbilt University, October, 2003.
  3. G. D. Curtis Schleher, A Electronic Warfare in the Information Age, Artech House, Boston, 1999.
  4. Joong-Soo Lim, "The Direction Finding Error of TDOA Method According to the Antenna Arrangement", Journal of the Korean Academic Industrial Society, Vol. 11, No. 11, pp. 4503-4508, November, 2010. https://doi.org/10.5762/KAIS.2010.11.11.4503
  5. Richard G. Wiley, Electronic Intelligence: The Analysis of Radar Signals (Second Edition), Artech House, Boston, 1993.
  6. Stephen E. Lipsky, Microwave Passive Direction Finding, Scitech Publishing Inc., 2004.
  7. Joong-Soo Lim, et al., "An Analysis of Direction Finding Accuracy of ELINT System" Journal of the Korean Academic Industrial Society, Vol. 10, No. 11, pp. 3104-3109, November, 2009. https://doi.org/10.5762/KAIS.2009.10.11.3104
  8. Richard G. Wiley, ELINT: The Interception and Analysis of Radar Signals, Artech House, Boston, 2006.
  9. Joong-Soo Lim, et al., "A Technology of Microwave Direction Finding with Circular Array Combination Method", Journal of the Korean Institute Electromagnetic Engineering and Science, Vol. 16, No. 6, pp. 549-555, June 2005.