Dual-station time difference frequency difference joint positioning method for fixed radiation source

A time difference and frequency difference, joint positioning technology, applied in positioning, measuring devices, instruments, etc., to achieve the effect of fast positioning speed, simple calculation, and high-precision estimation

Inactive Publication Date: 2018-11-06
XIAN UNIV OF POSTS & TELECOMM
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Problems solved by technology

How to overcome the fuzzy defects of the existing time-difference and frequency-difference combined positioning technology, further improve the accuracy of target position estimation, and expand the scope of reconnaissance is of great significance to the development of electronic reconnaissance technology

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  • Dual-station time difference frequency difference joint positioning method for fixed radiation source
  • Dual-station time difference frequency difference joint positioning method for fixed radiation source
  • Dual-station time difference frequency difference joint positioning method for fixed radiation source

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Embodiment Construction

[0034] The time difference and frequency difference joint positioning method is to use the time difference and frequency difference measurement information for passive positioning. In the case of the time difference and frequency difference measurement information of the signal, the position parameters of each observation station and the target height, the positioning of the target is a Solve problems with systems of nonlinear equations. The basic idea of ​​the method of the present invention is: convert the nonlinear equation system into a linear equation system through the radial distance, express the solution equation of the target position with the radial distance, and use the radial distance equation to solve the target relative to one of the observation stations Using the obtained target position equation to achieve accurate estimation of the target position.

[0035] The following will clearly and completely describe the technical solutions of the embodiments of the pre...

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Abstract

A dual-station time difference frequency difference joint positioning method for a fixed radiation source includes the following steps: two observation stations receive electromagnetic wave signals emitted by a target radiation source to obtain time difference frequency difference measurement information; time difference frequency difference positioning equations as described in the specificationare determined; target position equations as described in the specification are established; a radial distance equation: k6r16+k5r15+k4r14+k3r13+k2r12+k1r1+k0=0 is established; the radial distance equation is solved to obtain the radial distance between the first observing station and the target radiation source; and according to the radial distance r1 between the first observation station and thetarget radiation source, the target position equation is used to calculate the target position parameter, and the positioning of the target radiation source is completed. The invention adopts the time difference frequency difference joint positioning method and converts the nonlinear equations into linear equations by using the radial distance, the calculation is simple, the positioning speed isfast, and the high-precision estimation of the fixed radiation source position of a given plane can be realized.

Description

technical field [0001] The invention belongs to the technical field of passive positioning, in particular to a dual-station time-difference frequency-difference joint positioning method used for fixed target radiation sources in electronic reconnaissance applications. Background technique [0002] In the field of electronic countermeasures, the higher the accuracy of reconnaissance of radiation source location information, the more conducive to effective intelligence acquisition, electronic interference and precise strikes on radiation sources, providing a strong guarantee for the ultimate destruction of targets. Therefore, the passive location technology of radiation sources occupies a very important position in the field of electronic countermeasures. Among the current passive positioning technologies, the passive time-of-flight positioning system has become the most concerned research technology because of its advantages such as high positioning accuracy, strong networkin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S5/16
CPCG01S5/02G01S5/16
Inventor 杨洁刘聪锋苏娟
Owner XIAN UNIV OF POSTS & TELECOMM
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