基于互质阵列的运动单站信号直接定位方法

吴癸周; 张源; 张文俊; 裴禹豪; 张敏; 郭福成

doi:10.12000/JR22056

基于互质阵列的运动单站信号直接定位方法

DOI: 10.12000/JR22056

国防科技大学电子科学学院CEMEE国家重点实验室长沙 410073

基金项目: 国家青年自然科学基金(62101563)，国防科技大学科研计划项目(ZK20-26)

详细信息

作者简介:
吴癸周(1990-)，男，博士，讲师，主要研究方向为无源定位和目标跟踪、雷达信号处理

张　源(1997-)，女，博士研究生，主要研究方向为无源定位、信号处理

张文俊(1992-)，男，博士研究生，主要研究方向为无源定位和目标跟踪

裴禹豪(1992-)，男，博士研究生，主要研究方向为无源定位、信号处理

张　敏(1984-)，男，博士，副教授，主要研究方向为雷达信号处理、无源定位和目标跟踪

郭福成(1975-)，男，博士，教授，主要研究方向为无源定位和目标跟踪、雷达信号处理

通讯作者:
张源 zhangyuan@nudt.edu.cn

责任主编：易伟 Corresponding Editor: YI Wei
中图分类号: TN97
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出版历程
- 收稿日期: 2022-03-30
- 修回日期: 2022-05-23
- 网络出版日期: 2022-06-15
- 刊出日期: 2022-08-28

Coprime Array Based Direct Position Determination of Signals with Single Moving Observation

State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China

Funds: The National Natural Science Foundation of China (62101563), The Scientific Research Project of National University of Defense Technology (ZK20-26)

More Information

Corresponding author: ZHANG Yuan, zhangyuan@nudt.edu.cn

摘要

摘要: 信号直接定位方法是一种新型无源定位体制，具有适应低信噪比、无需参数关联等优势。为适应复杂电磁环境，该文提出了一种基于互质阵列的运动单站信号直接定位方法。以典型窄带信号为例，该文首先构建了互质阵列截获信号模型，然后推导了其差分共性阵对应的等效信号数学模型，最后使用空间谱技术构建了直接定位代价函数，实现了定位。经仿真分析验证，采用相同互质阵列时，该方法在分辨率和精度稍有损失的情况下可大幅提升传统直接定位方法的自由度，且与基于均匀线阵的直接定位方法相比，该方法在自由度、分辨率和定位精度等方面都具有优势。
- 直接定位 /
- 互质阵列 /
- 分辨率 /
- 自由度
Abstract: Signal Direct Position Determination (DPD) is a novel passive localization technology, which shows superior performance in terms of low signal noise rate adaptability and no parameter association necessity. To adapt to the complex electromagnetic environment, this study proposes a coprime array-based DPD method with single moving observation. Considering narrowband signals as an example, this study first formulates the intercepted signal model, then derives its equivalent model related to the corresponding difference co-array, and finally builds the DPD cost function via spatial spectrum technology. Simulation results show that the proposed method can greatly improve the degree of freedom compared to the traditional DPD with a minor loss of resolution and accuracy when an identical coprime array is used. Meanwhile, compared to the uniform linear array-based DPD, the proposed method shows superior performance in terms of the degree of freedom, resolution, and accuracy of localization.
- Direct Position Determination (DPD) /
- Coprime array /
- Resolution /
- Degree Of Freedom (DOF)

HTML全文

图 1 互质阵列示意图

Figure 1. Coprime array diagram

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图 2 直接定位场景示意图

Figure 2. Scenario diagram of direct position determination

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图 3 等效的差分共性阵

Figure 3. The equivalent difference co-array

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图 4 运动单观测站对6个辐射源进行定位场景示意图

Figure 4. The scene of 6 radiation sources localized by single moving observation

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图 5 CA-DPD代价函数

Figure 5. CA-DPD cost function

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图 6 CA-DPD多目标代价函数谱

Figure 6. Multiple target cost function spectrum of CA-DPD

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图 7 临近目标代价函数谱

Figure 7. Cost function spectrum of adjacent targets

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图 8 定位均方根误差与e关系图

Figure 8. The effect of e on localization RMSE

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图 9 单个目标代价函数谱

Figure 9. Cost function spectrum of single target

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图 10 定位均方根误差与SNR关系图

Figure 10. The effect of SNR on localization RMSE

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图 11 定位均方根误差与快拍数关系图

Figure 11. Relation between the number of sampling points in each observation interval and localization RMSE

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图 12 定位均方根误差与观测批次数关系图

Figure 12. Relation between the number of observation interval and localization RMSE

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表 1 算法耗时

Table 1. Elapsed time of algorithms

算法耗时(ms)

ULA-DPD 1192.0
CA-DPD 1337.1
CAori-DPD 1197.3
CA-2Step 276.9

下载: 导出CSV

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