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Sensors 2017, 17(1), 116;

A Novel Monopulse Technique for Adaptive Phased Array Radar

Department of Information and Electronics Engineering, Beijing Institute of Technology, Beijing 100081, China
School of Electrical Engineering, Columbia University, New York, NY 10027, USA
ElectroScience Laboratory, Ohio State University, Columbus, OH 43212, USA
Beijing Key Laboratory of Embedded Real-time Information Processing Technology, Beijing Institute of Technology, Beijing 100081, China
Author to whom correspondence should be addressed.
Academic Editor: Changzhi Li
Received: 27 September 2016 / Revised: 30 November 2016 / Accepted: 27 December 2016 / Published: 8 January 2017
(This article belongs to the Section Remote Sensors)
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The monopulse angle measuring technique is widely adopted in radar systems due to its simplicity and speed in accurately acquiring a target’s angle. However, in a spatial adaptive array, beam distortion, due to adaptive beamforming, can result in serious deterioration of monopulse performance. In this paper, a novel constrained monopulse angle measuring algorithm is proposed for spatial adaptive arrays. This algorithm maintains the ability to suppress the unwanted signals without suffering from beam distortion. Compared with conventional adaptive monopulse methods, the proposed algorithm adopts a new form of constraint in forming the difference beam with the merit that it is more robust in most practical situations. At the same time, it also exhibits the simplicity of one-dimension monopulse, helping to make this algorithm even more appealing to use in adaptive planar arrays. The theoretical mean and variance of the proposed monopulse estimator is derived for theoretical analysis. Mathematical simulations are formulated to demonstrate the effectiveness and advantages of the proposed algorithm. Both theoretical analysis and simulation results show that the proposed algorithm can outperform the conventional adaptive monopulse methods in the presence of severe interference near the mainlobe. View Full-Text
Keywords: monopulse technique; adaptive phased array; interferences monopulse technique; adaptive phased array; interferences

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Zhang, X.; Li, Y.; Yang, X.; Zheng, L.; Long, T.; Baker, C.J. A Novel Monopulse Technique for Adaptive Phased Array Radar. Sensors 2017, 17, 116.

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