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International Journal of Antennas and Propagation
Volume 2018, Article ID 8962048, 12 pages
https://doi.org/10.1155/2018/8962048
Research Article

Stepped Frequency Pulse Frequency Diverse Array Radar for Target Localization in Angle and Range Domains

Air and Missile Defense College of Air Force Engineering University, Xi’an, Shanxi 710051, China

Correspondence should be addressed to Ming Tan; moc.361@2991_gnimnat

Received 13 June 2018; Accepted 8 August 2018; Published 12 September 2018

Academic Editor: Andrea Francesco Morabito

Copyright © 2018 Ming Tan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Unlike phased array bringing angle-dependent and range-independent beamforming, a new kind of radar system called frequency diverse array (FDA) has been widely used for its ability to generate angle-range-dependent beampattern, which provides a broad prospect of radar application. Nevertheless, FDA beampattern is coupling in the angle and range responses, which results in the difficulty for FDA to differentiate the target in two domains simultaneously. In this paper, a stepped frequency pulse FDA (SFP-FDA) radar is proposed to wipe off the angle-range coupling in FDA and improve the target’s angle and range localization accuracy. Compared to the double-pulse FDA, the proposed system can achieve a better performance in range resolution and multitarget identification. The Cramér-Rao lower bound (CRLB) is derived and used to analyze the performance of the proposed system and double-pulse FDA radar. Numerical results are implemented to verify the validity of the proposed scheme.