辐射源信号波形已知的超视距目标直接定位方法

doi:10.3969/j.issn.0372-2112.2019.11.019

电子学报 ›› 2019, Vol. 47 ›› Issue (11): 2368-2377.DOI: 10.3969/j.issn.0372-2112.2019.11.019

辐射源信号波形已知的超视距目标直接定位方法

余婉婷, 于宏毅, 杜剑平, 王鼎

解放军信息工程大学信息系统工程学院, 河南郑州 450002

收稿日期:2017-04-11 修回日期:2019-03-24 出版日期:2019-11-25
- 作者简介:
- 余婉婷 女,1994年1月出生,湖北洪湖人.现为信息工程大学信息系统工程学院在读博士研究生.研究方向为通信信号处理、直接数据域定位算法研究.E-mail:ywan1107@163.com;于宏毅 男,1963年5月出生.信息工程大学教授,博士生导师.研究方向为无线通信理论、可见光通信技术和信号处理等;杜剑平 男,1981年3月出生,江西上饶人.信息工程大学讲师,博士.研究方向为信号处理、辐射源定位技术等;王鼎男,1982年10月出生,安徽芜湖人.信息工程大学副教授,博士.研究方向为阵列信号处理、辐射源定位技术等.

A Direct Position Determination Method for Over-the-Horizon Target on Known Radiation Source Waveforms

YU Wan-ting, YU Hong-yi, DU Jian-ping, WANG Ding

PLA Information Engineering University, Zhengzhou, Henan 450002, China

Received:2017-04-11 Revised:2019-03-24 Online:2019-11-25 Published:2019-11-25

摘要/Abstract

摘要： 现有直接定位（Direct Position Determination，DPD）算法主要研究对象是视距目标.针对传统无线电定位技术对超视距目标定位精度低的问题，提出一种辐射源信号波形已知的超视距直接定位（Over-the-Horizon Direct Position Determination，ODPD）方法.该方法基于电离层电子密度参数，依据最大似然（Maximum Likelihood，ML）准则，从信号数据域直接推导出仅关于目标位置的代价函数.其次，本文推导了关于电离层虚高测量误差的定位误差协方差矩阵.实验表明ODPD方法在低信噪比下相比现有算法，能显著提高超视距目标的定位精度，定位性能更接近克拉美罗界（Cramér-Rao Low Bound，CRLB）.误差分析显示，电离层虚高误差标准差在20km时，引起的定位误差能控制在10km的范围内.

关键词: 无源定位, 超视距, 直接定位, 最大似然准则, 电离层虚高, 克拉美罗界

Abstract: Direct Position Determination (DPD) algorithms usually focus on line-of-sight target. Aiming at the problems that traditional radio positioning technology is suboptimal, especially in the over-the-horizon target localization, this paper proposes an Over-the-horizon Direct Positioning Determination (ODPD) method with known radiation source waveforms. Based on the ionospheric electron density parameter, the cost function just about the target position is directly derived from the signal data domain through the Maximum Likelihood (ML) criterion. Furthermore, this paper deduces the positioning error covariance matrix considering the measurement error of the ionospheric virtual height. Experiments show that compared with the existing algorithms, the ODPD method can significantly improve the positioning accuracy of the over-the-horizon target at low SNR. The ODPD positioning performance is closer to the Cramér-Rao low bound (CRLB). When the standard deviation of the ionospheric virtual high error is 20km, the positioning error caused can be controlled within the range of 10km.

Key words: passive location, over-the-horizon, direct position determination, maximum likelihood criterion, ionosphere virtual height, Cramér-Rao low bound (CRLB)

中图分类号:

TN911.7

余婉婷, 于宏毅, 杜剑平, 等. 辐射源信号波形已知的超视距目标直接定位方法[J]. 电子学报, 2019, 47(11): 2368-2377.

YU Wan-ting, YU Hong-yi, DU Jian-ping, et al. A Direct Position Determination Method for Over-the-Horizon Target on Known Radiation Source Waveforms[J]. Acta Electronica Sinica, 2019, 47(11): 2368-2377.

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辐射源信号波形已知的超视距目标直接定位方法

A Direct Position Determination Method for Over-the-Horizon Target on Known Radiation Source Waveforms

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