多频带互相干处理中多目标相位补偿方法

doi:10.12305/j.issn.1001-506X.2022.10.11

系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (10): 3083-3089.doi: 10.12305/j.issn.1001-506X.2022.10.11

多频带互相干处理中多目标相位补偿方法

王宁^1,^2,^3,*, 吕晓德^1,², 李苗苗^1,^2,³, 刘忠胜^1,²

1. 中国科学院空天信息创新研究院, 北京 100094
2. 微波成像技术国家级重点实验室, 北京 100190
3. 中国科学院大学电子电气与通信工程学院, 北京 100049

收稿日期:2021-04-07 出版日期:2022-09-20 发布日期:2022-10-24
通讯作者: 王宁
作者简介:王宁(1995—), 男, 硕士研究生, 主要研究方向为无源雷达信号处理|吕晓德(1969—), 男, 教授, 博士, 主要研究方向为多源先进雷达探测技术、阵列天线及其信号处理技术、电磁散射及感知技术|李苗苗(1998—), 女, 硕士研究生, 主要研究方向为无源雷达信号处理|刘忠胜(1977—), 男, 副研究员, 博士, 主要研究方向为合成孔径雷达、无源雷达系统设计和集成

Multi-target phase compensation method for multi-band mutual-coherence processing

Ning WANG^1,^2,^3,*, Xiaode LYU^1,², Miaomiao LI^1,^2,³, Zhongsheng LIU^1,²

1. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2. National Key Laboratory of Microwave Imaging Technology, Beijing 100190, China
3. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2021-04-07 Online:2022-09-20 Published:2022-10-24
Contact: Ning WANG

摘要/Abstract

摘要：

雷达回波中往往存在不同速度的目标，并且不同频带信号之间存在依赖于速度的多普勒相位差异，该差异不能通过乘以统一的固定相位和线性相位得到补偿。本文针对此问题提出一种基于Keystone变换的多普勒相位补偿方法, 定义了一个新的慢时间变量, 将慢时间轴作为快频率的函数进行缩放, 从而对不同速度的目标同时完成多普勒相位补偿。通过仿真分析, 验证了算法的有效性, 为多频带、多目标信号相参处理中的互相干处理提供一种方法。

关键词: 多频带, 多目标, 互相干处理, Keystone变换

Abstract:

There are targets with different velocities in the radar echoes and Doppler phase difference between multi-band signals is dependent on velocity, which cannot be compensated by multiplying the uniform fixed phase and linear phase. This paper proposes a Doppler phase compensation method based on Keystone transform to solve this problem. This method defines a new slow time variable, which scales the slow time axis as a function of fast frequency to complete the Doppler phase compensation for different velocity targets at the same time. The effectiveness of the algorithm is verified by simulation analysis, which provides a method for mutual-coherence processing in multi-band and multi-target signal coherent processing.

Key words: multi-band, multi-target, mutual-coherence processing, Keystone transform

中图分类号:

TN958

王宁, 吕晓德, 李苗苗, 刘忠胜. 多频带互相干处理中多目标相位补偿方法[J]. 系统工程与电子技术, 2022, 44(10): 3083-3089.

Ning WANG, Xiaode LYU, Miaomiao LI, Zhongsheng LIU. Multi-target phase compensation method for multi-band mutual-coherence processing[J]. Systems Engineering and Electronics, 2022, 44(10): 3083-3089.

图/表 10

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参考文献 30

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信号序号	带宽/MHz	载频/GHz	脉冲宽度/μs	PRI/μs	目标时延/μs与速度/(m·s^-1)	采样频率/MHz
1	100	1	20	800	(1, 200)	1.2×130
2	130	2	24	500	(1, 200)	1.2×130

信号序号	带宽/MHz	载频/GHz	脉冲宽度/μs	PRT/μs	目标时延/μs与速度/(m·s^-1)	采样频率/MHz
1	100	1	20	800	(1, 200) (1+δ, 200) (1+5δ, 150)	1.2×130 1.2×130 1.2×130
2	130	2	24	500	(1, 200) (1+δ, 200) (1+5δ, 150)	1.2×130 1.2×130 1.2×130

信号	脉冲数	带宽/MHz	载频/MHz	脉冲宽度/μs	PRI/ms	采样频率/GHz
实测数据	7	B	f	T	P	1.5
模拟数据	7	B	f+8	T－10	P－0.5	1.5

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多频带互相干处理中多目标相位补偿方法

Multi-target phase compensation method for multi-band mutual-coherence processing

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