The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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An Improved Phase Estimation Method for AM Range Measurement System

진폭 변조 거리 측정 시스템에 적용 가능한 개선된 위상 추정 기법

  • 김대중 (서강대학교 전자공학과 CAD & ES 연구실) ;
  • 오택환 (LIG넥스원(주) Maritime연구소) ;
  • 황선영 (서강대학교 전자공학과 CAD & ES 연구실)
  • Received : 2012.04.23
  • Accepted : 2012.05.30
  • Published : 2012.06.30
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Abstract

This paper proposes an improved phase estimation method for AM(Amplitude Modulation) range measurement system. The previous phase estimation method induces errors by Doppler shift of a moving target. The proposed method compensates phase estimation error through the ADC(Adaptive Doppler Correction) to take the Doppler shift, thus can improve distance measurement accuracy. When compared with the previous method through simulation results, the Doppler shift compensation and accuracy are improved by 94.7% and 50%, respectively. Target distance error in an acoustic tank is estimated to be 7.7cm, which confirms that the proposed method can be used to estimate the distance in the marine environment.

본 논문에서는 진폭 변조 거리 측정 시스템에 적용 가능한 개선된 위상 추정 기법을 제안한다. 기존 위상 측정 방법은 이동 목표물의 도플러 천이에 의해 위상 측정 오차가 발생한다. 제안된 위상 추정 기법은 도플러 천이에 대해 적응 도플러 보정(Adaptive Doppler Correction)을 사용하여 위상 추정 오차를 보정하므로 거리 측정 정확도를 향상 시킬 수 있다. 모의실험 결과 도플러 주파수 천이 보정은 기존 방식보다 94.7% 향상된 성능을 보이며, 거리 측정 정확도는 50%로 향상되었다. 음향 수조에서는 오차가 7.7cm로 추정되어 해양 환경에서 음파를 이용하여 거리 추정에도 적용 가능함을 확인하였다.

Keywords

References

  1. A. Kilpela, R. Pennala, and J. Kostamovaara, "Precise Pulsed Time-of Flight Laser Range Finder for Industrial Distance Measurements", Review of Scientific Instruments, Vol. 72, No. 4, pp. 2197-2202, April 2001. https://doi.org/10.1063/1.1355268
  2. E. Hyun, and J. Lee, "Method to Improve Range and Velocity Error Using De-interleaving and Frequency Interpolation for Automotive FMCW Radars", International Journal of Signal Processing, Image Processing and Pattern Recognition, Vol. 2, No. 2, June 2009.
  3. H. Rohling, and M. Meinecke, "Waveform Design Principles for Automotive Radar Systems", in Proc. CIE International Conference on Radar, Beijing, China, pp. 1-4, Oct 2001.
  4. S. Poujouly, B. Journet, and D. Placko, "Digital Laser Range Finder : Phase-Shift Estimation by Undersampling Technique", in Proc. IEEE 25th Annual Conference, California, USA, Vol. 3, pp. 1312-1317, Nov 1999.
  5. Bee-Jay Park, Chung-Woo Lee, Chung-Choo Chung, Jae-Hyuk Sho, and Sang-Jin Ong, "Implementation of High-Resolution Laser Distance Measurement System using Phase-Shift Method", 2004 Conference on Information and Control Systems, Vol. 2004, No. 11, pp. 589-591, Nov 2004.
  6. Hyoung-Woo Noh, Jeong-Ho Park, Il-Heung Kang, Mun-Gak Choi, and Kang-Wook Kim, "The Phase Difference Measurement Module Development for Amplitude Modulated Range Measurement System", KIEES Journal, Vol. 22, No. 2, pp. 182-190, Feb 2011.
  7. S. Nejad, "Comparison of TOF, FMCW and Phase-Shift Laser Range-Finding Methods by Simulation and Measurement", Quartarly Journal of Technology & Education, Vol. 1, No. 1, Autumn 2006.
  8. K. Ibrahim, and M. Abdul-Karim, "A Novel Digital Phase Meter", IEEE Trans. Instrum. Meas., Vol. IM-36, pp. 711-716, Sept 1987. https://doi.org/10.1109/TIM.1987.6312776
  9. S. Mahmud, "Error Analysis of Digital Phase Measurement of Distorted Waves", IEEE Trans. Instrumentation and Meas., Vol. 38, pp. 6-9, Feb 1989. https://doi.org/10.1109/19.19989
  10. Young-Suk Song, Jae-Chul Kim, In-Kyu Choi, and Jong-Sik Park, "An Advanced Phase Angle Measurement Algorithm And Error Analysis", IEEK Journal, Vol. 41, No. 3, pp. 25-32, May 2004.
  11. R. Micheletti, "Phase Angle Measurement Between Two Sinusoidal Signals", IEEE Trans. Instrum. Meas., Vol. 40, No. 1, pp. 40-42, Feb 1991. https://doi.org/10.1109/19.69948
  12. Kang-Ryul Ryu, Jong-Pil Lee, Tae-Jin Kim, Dong-Wook Yoo, Eui-Ho Song and Byung- Duk Min, "A Method of PLL(Phase-Locked Loop) using FFT", KIPE Journal, Vol. 13, No. 3, pp. 206-212, June 2008.
  13. S. Mahmud, "High Precision Phase Measurement Using Adaptive Sampling", IEEE Trans. Instrum. Meas., Vol. 38, No. 5, pp. 954-960, Oct. 1989. https://doi.org/10.1109/19.39036
  14. Kook-Hyun Nam, "Doppler Frequency Estimation for Mobile OFDM System", A master's dissertation, Kwangwoon, 2009.
  15. P. Welch, "The Use of Fast Fourier Transform for the Estimation of Power Spectra: A Method Based on Time Averaging Over Short, Modified Periodograms", IEEE Trans. Audio and Electroacoustics, Vol. AU-15, No. 2, pp. 70-73, June 1967.
  16. Joong-Tak Son, Seung-Houn Lee, and Kil-Houm Park, "Instantaneous Frequency Estimation of Doppler Signal using Wavelet Transform", IEEK Journal, Vol. 42, No. 3, pp. 99-106, May 2005.
  17. W. Kuang, and A. Morris, "Using Short-Time Fourier Transform and Wavelet Packet Filter Banks for Improved Frequency Measurement in a Doppler Robot Tracking System", IEEE Trans. Instrumentation and Measurement, Vol. 51, No. 3, pp. 440-444, June 2002. https://doi.org/10.1109/TIM.2002.1017713
  18. Y. Zhang, Z. Guo, W. Wang, S. He, T. Lee, M. Loew, "A Comparison of The Wavelet and Short-Time Fourier Transforms for Doppler spectral analysis", Medical Engineering & Physics, Vol. 25, Issue 7, pp. 547-557, Sep 2003. https://doi.org/10.1016/S1350-4533(03)00052-3
  19. J. Proakis, and D. Manolakis, Digital Signal Processing, 3rd Edition, Prentic Hall, pp. 118-133, 1996.
  20. S. Kirkpatrick, C. D. Gelatt, and M. P. Vecchi, "Optimization by Simulated Annealing", Science, Vol. 220, No. 4598, pp. 671-680, May 1983. https://doi.org/10.1126/science.220.4598.671
  21. P. J. M. van Laarhoven, and E. H. L. Aarts, "Simulated Annealing: Theory and Applications", Kluwer Academic Publishers, pp. 7-15, May 1987.