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Multi moving station passive time difference positioning method

A time difference positioning and movement technology, applied in positioning, radio wave measurement system, measuring device, etc., can solve the problems of easy divergence of positioning results, high computational complexity, and low positioning accuracy, so as to avoid falling into local optimum and high positioning The effect of precision and small amount of calculation

Inactive Publication Date: 2017-03-15
HARBIN ENG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a mobile multi-station passive time difference positioning method that solves the problems of low positioning accuracy, high computational complexity, large amount of calculation, and easy divergence of positioning results in the current time difference passive positioning system

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings.

[0056] The invention discloses a multi-station passive time difference positioning method, which aims to solve the problems of low positioning accuracy, large amount of calculation and easy divergence of positioning results in the current time difference positioning system. The realization steps are as follows: 1) using multi-station time difference The positioning model calculates three groups of arrival time differences to form a time difference observation matrix; 2) performs maximum likelihood estimation on the time difference observation matrix and converts it into an optimization problem; 3) initializes the particles and evaluates the fitness function value of each particle; 4) Update the speed and position of the particles 5) Select the optimal particle according to the fitness function and update the global extremum; 6) Use the natural selection mechanism to reo...

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Abstract

The invention belongs to the technical field of multi moving station passive positioning, and relates to a multi moving station passive time difference positioning method of performing high-speed and high-accuracy positioning on a target. The multi moving station passive time difference positioning method includes the steps: obtaining a real distance value between a target and four base stations by means of a multi moving station time difference positioning module; by means of the four base stations, obtaining three groups of time difference, and according to the conversion relation between the distance difference and the time difference, solving the three groups of time difference; forming a time difference observation matrix by means of three groups of time difference equation set; and performing maximum likelihood estimation on the observation matrix to obtain a likelihood function, and converting the likelihood function into solution of optimization problem so as to derive a fitness function. The multi moving station passive time difference positioning method distribute particles according to grids, so that the particles can be searched globally, and can effectively avoid the particles running into local optimum.

Description

technical field [0001] The invention belongs to the technical field of motion multi-station passive positioning, and relates to a motion multi-station passive time-difference positioning method for fast and high-precision positioning of a target. Background technique [0002] In recent years, passive positioning has played an increasingly important role in the civil and military fields. Passive positioning technology has attracted the attention of various countries due to its advantages of fast positioning speed, high positioning accuracy, and electromagnetic concealment. The passive positioning system itself does not actively radiate electromagnetic waves, but passively receives electromagnetic signals from the target radiation source to locate the target radiation source. The common positioning systems of passive positioning systems are divided into angle measurement cross positioning, multi-station Doppler difference positioning and multi-station time difference positioni...

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Application Information

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IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 蒋伊琳刘梦楠郭立民陈涛
Owner HARBIN ENG UNIV
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