分布式相参雷达相参效率及相参景深研究

doi:10.12305/j.issn.1001-506X.2024.05.12

Abstract

Abstract:

The signals transmitted by distributed coherent aperture radar (DCAR) can only be completely coherently superimposed at the point of interest. Under the constraint of transmit coherent efficiency, energy dispersion phenomenonmay occur due to mismatched coherence positions. In this regard, the definition of "coherent depth of field" is used to describe the phenomenon of energy dispersion, and the reasons for the formation of coherent depth of field are given. Its bounded and periodic characteristics are pointed out, and its influencing factors are analyzed. The spatial distribution law of transmit coherent efficiency is revealed in a concrete and quantitative way, which can effectively support engineering practices such as the selection of DCAR transmission signal parameters and array configurations. Finally, the effectiveness of the proposed method is demonstrated through simulation experiments of DCAR design using multi node unit radars.

Key words: distributed coherent aperture radar (DCAR), transmit coherent efficiency, coherent depth of field, distributed transmit beamforming

CLC Number:

TN957.3

Yuanhao WANG, Hongqiang WANG, Xinghua LIU, Yang ZENG, Qi YANG. Research on coherent synthesis efficiency and coherent depth of field of distributed coherent aperture radar[J]. Systems Engineering and Electronics, 2024, 46(5): 1573-1582.

Figures/Tables 12

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[2]	CHEN Jinming, WANG Tong, WU Jianxin, LIU Xiaoyu. Target parameter estimation method for distributed coherent aperture radar based on grid mismatch filtering [J]. Systems Engineering and Electronics, 2019, 41(11): 2460-2470.
[3]	LIU Xinghua, XU Zhenhai, WANG Luoshengbin, DONG Wei, XIAO Shunping. Coherent parameters estimation algorithm for distributed coherent aperture radar based on signal reconstruction [J]. Systems Engineering and Electronics, 2018, 40(9): 1931-1938.
[4]	. Geometric arrangement constraints of distributed coherent aperture radar [J]. Systems Engineering and Electronics, 2017, 39(8): 1723-1731.

Research on coherent synthesis efficiency and coherent depth of field of distributed coherent aperture radar

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