多运动站异步观测条件下的直接定位算法

冯奇; 曲长文; 周强

doi:10.11999/JEIT160314

多运动站异步观测条件下的直接定位算法

doi: 10.11999/JEIT160314

冯奇¹,
曲长文^1, ,,
周强²

1.
(海军航空工程学院电子信息工程系烟台 264001) ②(海军航空工程学院科研部烟台 264001)

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出版历程
- 收稿日期: 2016-04-01
- 修回日期: 2016-09-01
- 刊出日期: 2017-02-19

Direct Position Determination Using Asynchronous Observations of Multiple Moving Sensors

1.
(Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, China)
2.
(Scientific Research Department, Naval Aeronautical and Astronautical University, Yantai 264001, China)

摘要

摘要: 针对多运动站无源融合定位系统中的异步观测问题，该文提出一种基于空间谱分析的直接定位算法。首先利用子空间分析理论建立异步观测直接定位模型，构造多站协同定位联合空间谱函数，采用多级搜索方法实现定位解算。然后推导了该算法的定位误差协方差矩阵及克拉美罗下限。最后对该算法在异步观测条件下的定位性能进行蒙特卡洛仿真。仿真结果表明算法定位精度能够逼近克拉美罗下限，定位性能优于基于定位参数的分步定位算法，尤其在低信噪比情况下优势更明显。
- 无源定位 /
- 异步观测 /
- 直接定位 /
- 阵列信号处理 /
- 脉冲到达角
Abstract: A Direct Position Determination (DPD) algorithm based on spatial spectrum analysis for the issue of asynchronous observation in the multiple moving sensors passive fusion location system is proposed. At first, a direct determination mathematical model of the asynchronous scene is constructed and a multiple sensors cooperative spatial spectrum function is composed. Furthermore, the position of the emitter can be got by a two or three dimensional search, and then the derivations of the estimators variance and the Cramer-Rao Lower Bound (CRLB) are given. Finally, the Monte Carlo simulations over the asynchronous scene indicate that the accuracy of the proposed method is close to the Cramer-Rao lower bound and superior to the two-step location method based on the location parameters, especially in the low SNR.
- Passive location /
- Asynchronous observation /
- Direct Position Determination (DPD) /
- Array signal processing /
- Angle of arrival

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参考文献(20)

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