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Multi-base station single frequency network passive cooperation positioning method based on MML-PMHT

A collaborative positioning and single frequency network technology, applied in positioning, radio wave measurement system, radio wave reflection/re-radiation, etc., can solve the problems of three-bit data association, reduce the amount of association, improve positioning accuracy, and reduce the method effect of complexity

Active Publication Date: 2017-09-29
河北凯通信息技术服务有限公司
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the three-bit data association problem in the passive cooperative positioning of multi-base station single frequency network

Method used

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  • Multi-base station single frequency network passive cooperation positioning method based on MML-PMHT
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  • Multi-base station single frequency network passive cooperation positioning method based on MML-PMHT

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Embodiment Construction

[0013] Combine the following figure 1 The principle of the MM1-PMHT method of the present invention is described in detail.

[0014] The "state" referred to below represents the position in the x direction on the Cartesian coordinate plane, the speed in the x direction, the position in the y direction, and the speed information in the y direction.

[0015] Step 1 specifically establishes a mathematical model of a multi-base-station single-frequency network passive co-location system in a scenario where the number of targets is unknown.

[0016] Suppose the kth frame has N in the monitoring area k goals, where N k is unknown. The state of the i-th target at frame k is T represents the vector transpose, and assumes that the motion model is as follows:

[0017]

[0018] Among them, F k is the target state transition matrix. The state of the radiation source is known, and the state of the jth radiation source at the kth frame is given by express. The state of the rec...

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Abstract

The invention discloses a multi-base station single frequency network passive cooperation positioning method based on MML-PMHT. The method comprises steps that firstly, a mathematics model of a multi-base station passive cooperation positioning system is established; secondly, under an unknown target number scene, the target number is determined through a hypothesis method, a logarithm likelihood ratio function is constructed, and maximization of the likelihood function is carried out to solve the target number; thirdly, a super target concept is utilized to solve a three-dimensional data association problem, the logarithm likelihood ratio function of an MML-PMHT algorithm is optimized through utilizing a Quasi-Monte Carlo search algorithm, so a target solution problem is converted into an optimization problem of the likelihood function; and lastly, track maintenance is realized through a sliding window method. The method is advantaged in that a multi-base station cofrequency network three-dimensional data association problem can be rapidly and effectively solved, and a track initiation and maintenance problem of weak targets under the complex environment can be realized.

Description

technical field [0001] The invention belongs to the field of radar target tracking, and relates to a new maximum likelihood probability multi-hypothesis (MML-PMHT) multi-base station single-frequency network passive cooperative positioning method. Background technique [0002] The passive co-location (Passive Coherent Location, PCL) system itself does not have a transmitting antenna, it uses commercial digital TV (Digital Video Broadcasting-Terrestrial, DVB-T), FM broadcasting (FM broadcasting, FM), mobile phone base stations, etc. as external radiation sources Through the coherent processing of the target echo signal received by the receiving antenna and the reference signal (direct wave signal), the target is passively located, and it has unique advantages in anti-anti-radiation missiles, anti-stealth technology and anti-electronic countermeasures. The multi-base station PCL system includes multiple external radiation sources and receiving sources, fully utilizes the spati...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S13/58G01S13/72G01S13/87
Inventor 郭云飞冯松涛张天宇骆吉安申屠晗
Owner 河北凯通信息技术服务有限公司
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