Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (6): 1497-1505.doi: 10.12305/j.issn.1001-506X.2021.06.06

• Radar Anti-jamming Technology • Previous Articles     Next Articles

Angle estimation method of extended target based on polarization monopulse radar

Yemin LIU, Yongzhen LI*, Datong HUANG, Chen PANG   

  1. College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China
  • Received:2020-10-16 Online:2021-05-21 Published:2021-05-28
  • Contact: Yongzhen LI

Abstract:

When the chaff centroid jamming in monopulse radar is presented, it will be considered that two indistinguishable targets are in the beam. Due to the aliasing and coupling between the target and the jamming echo, the angle measurement deviation will be caused, and finally target tracking will be lost. In view of this situation, this paper takes advantage of the high accuracy of wideband monopulse radar angle measurement and uses the polarization information to propose a method for estimating the angle of extended targets based on polarization monopulse radar. Firstly, the characteristics of chaff centroid jamming in wideband monopulse radar system are analyzed, and the dual polarization sum and difference signal model of the extended targets is given. And then, the angle of arrival (AOA) of target and chaff jamming is estimated according to the polarization echo signal of sum and difference channel through simultaneous equations, which provides conditions for tracking the target with the angle information of the target. Finally, the influence of some key parameters on the performance of target angle estimation is analyzed by the Monte Carlo simulation experiment, and compared with the traditional monopulse radar angle measurement method. Theoretical analysis and simulation results show that the performance of AOA estimation for wideband monopulse radar is better than that of traditional monopulse radar under chaff centroid jamming.

Key words: broadband monopulse radar, polarization, angle of arrival (AOA), centroid jamming

CLC Number: 

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