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International Journal of Antennas and Propagation
Volume 2017 (2017), Article ID 4060789, 8 pages
https://doi.org/10.1155/2017/4060789
Research Article

Multiband Radar Signal Coherent Processing Algorithm for Motion Target

College of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China

Correspondence should be addressed to Ying Zhang

Received 24 April 2017; Revised 6 June 2017; Accepted 22 June 2017; Published 20 November 2017

Academic Editor: Yumao Wu

Copyright © 2017 Tingjing Wang 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

In real application, most aerial targets are movable. In this paper, an effective multiple subbands coherent processing method is proposed for moving target. Firstly, an echoed signal model of motion target based on geometrical theory of diffraction is established and the influence of velocity on range profile of the target is analyzed. Secondly, a method based on minimum entropy principle is used to compensate velocity. Then, incoherent factors including a quadratic phase term, a linear phase factor, a fixed factor, and an amplitude difference term are analyzed. Subsequently, efficient methods are applied to estimate other incoherent factors, except that the quadratic term is small enough to be ignored. Finally, the feasibility and performance of the proposed method are investigated through numerical simulation.