Cooperative Range and Angle Estimation With PA and FDA Radars

• Published in: IEEE transactions on aerospace and electronic systems Vol. 58; no. 2; pp. 907 - 921
• Main Authors: Zhu, Jingjing, Zhu, Shengqi, Xu, Jingwei, Lan, Lan, He, Xiongpeng
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Cramer-Rao bounds; cramér–Rao bound (CRB); Design criteria; Design parameters; Estimation; frequency diverse array (FDA); Frequency estimation; Frequency-domain analysis; Location awareness; Parameter estimation; phased array (PA); Phased arrays; Radar; Radar antennas; Radar arrays; Radar equipment; Range and angle estimation; weighted least squares (WLS)
• ISSN: 0018-9251; 1557-9603
• DOI: 10.1109/TAES.2021.3117050

Target localization with unambiguous range and angle estimation of the signal-of-interest is a key task of a radar system, especially for wide region surveillance. In this article, we develop a novel dual-mode array radar scheme, namely phased array and frequency diverse array cooperated radar, to provide unambiguous range and angle estimation. Our approach combines the advantages of the PA in high transmit gain and that of the FDA in resolving range ambiguity. In general, two kinds of cooperative parameter estimation algorithms are derived to determine the range and angle parameters jointly. The proposed algorithms can be interpreted as different combination methods of the PA and FDA, including the uniform combination and weighted combination based on weighted least squares, where the weight is designed with user tunable angle parameters. Particularly, the design criterion for the tunable parameter is given. At the analysis stage, the Cramér-Rao bounds are studied to verify the performance of parameter estimation. Extensive simulation results demonstrate the effectiveness of parameter estimation with the dual-mode array radar.