多子带融合解动目标径向速度模糊方法

doi:10.12305/j.issn.1001-506X.2025.03.11

Abstract

Abstract:

A multi-subband coherent fusion de-ambiguity method is proposed to address the issue of increased error probability in solving de-ambiguity problems using methods based on the Chinese Remainder Theorem. Firstly, the proposed method estimates the steering vectors of the moving targets in each frequency band. Then, the method sequentially solves the focusing transformation matrix at each reference frequency and employs spatial focusing processing to improve the accuracy of radial velocity estimation for the moving targets. Finally, de-ambiguity processing is performed. The results of simulation and real data demonstrate that the proposed method effectively improves the accuracy of radial velocity estimation for moving targets and increases the probability of correctly resolving ambiguities.

Key words: synthetic aperture radar (SAR), velocity ambiguity, subband processing, radial velocity estimation, ambiguity resolution

CLC Number:

TN951

Zhiwei YANG, Andong YANG, Gengchen LIANG, Xianghai LI, Xiaorui LI, Jie LIU. Multi-subband fusion for radial velocity ambiguity resolution[J]. Systems Engineering and Electronics, 2025, 47(3): 788-796.

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References 30

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参数	数值
中心频率/GHz	9.6
子带频率间隔/MHz	200
子带个数	4
通道间距/m	5
通道个数	4
平台速度/(m/s)	7 200

参数	数值
中心频率波段	X波段
信号带宽/MHz	780
脉冲重复频率/Hz	1 000
顺轨基线/m	0.9
平台高度/m	8 000
平台速度/(m/s)	125

子带序号	V₁	V₂	V₃
1	1.352	1.450	1.401
2	1.434	1.605	1.751
3	1.732	1.756	1.901
4	1.738	1.905	1.952
5	2.026	2.121	2.073
6	-1.889	-2.169	-1.609
7	-1.916	-2.008	-1.293

序号	目标速度真实值	目标速度测得值	所提方法处理结果
Part1	2.421	2.061	2.087
Part2	2.318	2.069	2.071
Part3	2.219	2.051	2.052
Part4	2.103	1.870	1.901

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Multi-subband fusion for radial velocity ambiguity resolution

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