Target-echo-emission source ternary data associated digital broadcasting passive positioning method

A technology of digital broadcasting and passive positioning, which can be used in the reflection/re-radiation of radio waves, the use of re-radiation, radio wave measurement systems, etc., and can solve problems such as poor practicability

Inactive Publication Date: 2015-05-06
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In order to overcome the shortcomings of poor practicability of the existing digital broadcasting passive positioning methods, the present invention provides a digital broadcasting passive positioning method associated with target-echo-transmission source ternary data

Method used

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  • Target-echo-emission source ternary data associated digital broadcasting passive positioning method
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  • Target-echo-emission source ternary data associated digital broadcasting passive positioning method

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Embodiment Construction

[0075] refer to Figure 1-7 . The specific steps of the digital broadcast passive positioning method associated with the target-echo-transmission source ternary data of the present invention are as follows:

[0076] 1. Confirm the wave gate definition.

[0077] In multi-dimensional allocation, the establishment of the allocation tree occupies about 90% of the CPU computing time. In order to reduce the amount of calculation, before the allocation number is established, firstly, according to the track information of the target t before the k-th scan, it corresponds to the target t at the k time. Measurements at transmitter s Make predictions, according to the measurement covariance Establish wave gates, so for N targets and S transmitters, there are N×S confirmation gates, and the definition of confirmation gates is as follows:

[0078] v ts k = { z ; ( ...

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Abstract

The invention discloses a target-echo-emission source ternary data associated digital broadcasting passive positioning method which is used for solving the technical problem of poor practicability of the existing digital broadcasting passive positioning method. The technical scheme is that in the track starting stage, infeasible branches are cut by aid of station distribution geometrical information; in the track maintaining stage, a wave gate is generated by aid of the existing track information and the scale of a distribution tree is reduced; a feasible measurement sequence meeting wave gate constraint is gathered for cost evaluation; finally, the multi-dimension assignment problem is continuously relaxed to a sequence two-dimensional distribution problem by aid of the lagrangian relaxation algorithm, and solution is acquired through the improved auction algorithm. The target-echo-emission source ternary data associated digital broadcasting passive positioning method achieves passive target tracing under target-echo-emission source ternary data association, increases the track starting speed, improves the target tracing accuracy, effectively improves the passive target tracing performance in the clutter environment, and has significance in practical application of the passive target tracing projects.

Description

technical field [0001] The invention relates to a digital broadcasting passive positioning method, in particular to a digital broadcasting passive positioning method associated with target-echo-transmission source ternary data. Background technique [0002] The document "Tracking in multi-static passive radar systems using DAB / DVB-T illumination, Signal Processing, Vol92(6), 2012, p1365–1386" discloses a tracking method for multi-static passive positioning systems based on digital broadcasting. The method adopts a three-stage tracking strategy: the first tracking stage adopts the multi-hypothesis tracking method (MHT) in the target parameter space (including the distance between two stations and the distance between two stations); the second stage is mainly based on the likelihood ratio (LR) and integer programming (IP) to delete false targets; the third stage completes the target tracking in Cartesian space, and adopts two schemes of single-target multi-hypothesis tracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/06G01S13/58
CPCG01S13/06G01S13/58
Inventor 何重阳梁彦张金凤张伟芳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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