Direction Finding of Wideband Radar Signals with Two Rotating Antennas

Document Type : Original Article

Authors

1 PhD student, Imam Hossein University, Tehran, Iran

2 Associate Professor, Imam Hossein University, Tehran, Iran

3 Assistant Professor, University of Tehran, Tehran, Iran

Abstract

Detection and direction of arrival (DOA) estimation is a signal processing challenge for wideband­ signals like LPI radar signals. Modern radars change theirs signal waveforms from pulse to pulse and distribute the signal in the time or frequency domain. Traditional direction finders usually use a narrowband channel to maximize sensitivity and detection range. Increasing the signal bandwidth decreases the SNR and the probability of intercept (POI). In this paper we proposed a new method for the direction finding of LPI radars, which increases the POI. In the proposed method we used two rotating antennas, one antenna used as a matched filter to the other one, in order to increase the processing gain. The proposed method despite traditional direction-finding methods, is able to detect and analyze pseudo noise and spread spectrum radar signals, without any theoretical limitation on signal frequency bandwidth. In this paper we used two antennas and proposed a new method with cross correlation technic for direction finding such as the method used in Monopulse tracking radars and compared it with other methods. Simulations shows good detection specifications for low SNR and we could reach about 25dB processing gain in wideband radar signals like LPI Radars or LFM Modulated radar signals.

Keywords

References

   [1]      P. ­E.­ Pace, “­Detecting­ and Classifying­­ Low Probability Of Intercept Radar,” Norwood, MA: Artech House, 2009.
   [2]      M. A. Richards, J. A. Scheer, and W. A. Holm, “Modern Radar,” Sci. Tech., 2010.
   [3]      S. E. Lipsky, “Microwave Passive Direction Finding,” Sci. Tech., Publishing Inc, 2004.
   [4]      E. Tuncer and B. Friendlander, “Classical and modern Direction of arrival Estimation,” Elsevier, 2009.
   [5]      R. A. Poisel, “Electronnic Warfare Target Location Methods,” Artech House, 2012.
   [6]      M. Ferdisizadeh Naini, Y. Egbali, and F. Moradi, “DoA Estimation in the Presence of the Unknown Mutual Coupling Using a UCA with directive Antennas,” Journal of Radar, 2018. (In Persian)
   [7]      K. Cui, W. Wu, X. Chen, J. Huang, N. Yuan, “2-D DO Estimation of LFM Signals Based on Dechirping Algorithm and Uniform Circle Array,” Signals, 2017.
   [8]      S. M. Sherman and D. K. Barton, “Monopulse Principles and Techniques Radar,” Artech House, 2011.
   [9]      R. G. Wiley, “ELINT the interception and analysis of radar signals,” Artech House, 2006.
[10]      Qing Sun1, Qi Liang Zhang1, Xueyu Huang1, and Qian Gao2, “Target detection and localization method for distributed monopulse arrays in the presence of mainlobe jamming,” EURASIP Journal on Advances in Signal Processing, 2020.
[11]      R. Ardoino and A. Megna, “LPI Radar Detection SNR Performances for a Dual Channel Cross Correlation based ESM Receiver,” European Radar Conference (EuRAD), 2009.
[12]      Yi-Xiong Zhang, et al., “A Novel Monopulse Angle Estimation Method for Wideband LFM Radars,” Sensors, 2016.
[13]      A. K. Singh and K. Subba Rao, “Digital Receiver–based Electronic Intelligence System Configuration for the Detection and Identification of Intra pulse Modulated Radar Signals,” Defence Science Journal, vol. 64, no. 2, 2014.
[14]      S. Gogineni and A. Nehorai, “Monoplse MIMO Radar for Target Tracking,”­­ IEEE Transactions on Aerospace and Electronic Systems, vol. 47, no. 1, January 2011.
[15]      Zhang Guanjie, Guo Min, and Bao Yongjie, “Silence Tracking Radar,” Conference, Radar, 2001.
[16]       Y. Zhang, et al., “Study on the technology of tracking noise jamming with Monopulse radar and Analysis on its tracking Errors,” WSEAS Transactions on Communications, Hangzhou, China, pp. 648-657, 2009.
[17]      Chye Huat Peck and P. J. Moore, “A Direction Finding Technique for wideband Impulsive Noise Source,” IEEE Transactions on Electromagnetic Compatibilty, vol. 43, no. 2 , May 2001.
[18]      Andrea de Martino, “Introduction to modern EW System,” Artech House, 2012.
[19]      K. M. Wong, et al., “Detection of low probability of intercept radar signals,” Ottawa: Contract Report DRDC, 2009.
[20]      A. W. Houghton and C. D. Reeve, “Detection of spread-spectrum signals using the time-domain filtered cross spectral density,” IEEE Proc. Radar, Sonar Navig., vol. 142, no. 6, December 1995.
S. A. (REZA) Zekavat and R. Michael Buehrer, “Handbook Of Position Location,” Wiley, 2019.

Files

History

  • Receive Date: 12 June 2019
  • Revise Date: 09 June 2020
  • Accept Date: 14 May 2020
  • Publish Date: 20 February 2020

Share

How to cite

Statistics