PR multi-target tracking method used for SFN and multi-path propagation

A multi-target tracking, passive radar technology, applied in the direction of using re-radiation, reflection/re-radiation of radio waves, measurement devices, etc., can solve the problems of false targets, no simultaneous multi-target tracking method, etc., to enhance detection capabilities, avoid The effect of calculation

Active Publication Date: 2018-08-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

When the multipath signal exceeds the detection threshold, multipath clutter will be formed, resulting in false targets
[0004] The current relevant literature only discloses the processing of multi-target tracking in single frequency network and multi-target tracking in multi-path environment, and has not yet dealt with multi-target tracking methods in the case of multi-path measurement under single frequency network

Method used

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  • PR multi-target tracking method used for SFN and multi-path propagation
  • PR multi-target tracking method used for SFN and multi-path propagation
  • PR multi-target tracking method used for SFN and multi-path propagation

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Embodiment Construction

[0061] In the following, the present invention will be further described in detail with reference to the drawings and specific embodiments:

[0062] The simulation is carried out in an LTE-based SPR scenario, tracking two adjacent UAVs moving in a uniform straight line, such as figure 2 As shown, compare MS-MP-PMHT with standard PMHT, MS-PMHT, and MP-PMHT.

[0063] (1) Initialize the background parameters.

[0064] 1a. The initial states of the two UAVs are as follows:

[0065] x 1 (1)=[300m,10m / s,850m,-10m / s], x 2 (1)=[300m,12m / s,800m,-8m / s]. The initial covariance of the two targets is the diagonal matrix diag([200,1,200,1]).

[0066] 1b. The number of reflection points is 1, and the position is p ref =(-200m,100m) T , The position of the 2 external radiation sources is p 1 =(1000m,0m) T , P 2 =(-500m,1000m) T . The receiver position is p rec =(0m,0m) T The measuring range of TDOA is 1.2~5.2us, and the measuring range of Doppler shift is -180~-30Hz and 50~200Hz. The clutter is ...

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Abstract

The invention belongs to the field of PR (Passive Radar) target tracking technology and specifically relates to a PR multi-target tracking method used for SFN (Single Frequency Network) and multi-pathpropagation. The tracking method proposed by the invention takes a plurality of measurements reaching a receptor via different propagation paths of different external radiation sources as possible target measurements in handling correlation between measurements and targets, paths and external radiation sources, and correlates the measurements with multipath measurement functions of different bistatic pairs correctly, so that accumulation of target information is acquired and target detection capability is enhanced. Then target tracking is performed in a sliding window manner.

Description

Technical field [0001] The invention belongs to the technical field of passive radar target tracking, and specifically relates to a passive radar multi-target tracking method for single-frequency network and multipath propagation. Background technique [0002] Target tracking technology is widely used in various fields, especially radar signal systems. Passive radar PR is a bistatic or multistatic system that uses external radiation source signals to detect and track targets, such as radio, television, and communication node base (NB). PR shows many advantages in the field of urban supervision. Many PR systems nowadays use single frequency networks (SFN), such as digital video broadcasting (DVB-T), digital audio broadcasting (DAB), and urban long-term evolution (LTE) wireless communication systems. All external radiation sources in SFN emit signals of the same frequency at the same time. Therefore, multiple measurements may be derived from different external radiation source si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72
CPCG01S13/726
Inventor 唐续李明晏光昌国李改有
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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