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Dim target track-before-detect method based on particle filter algorithm and track management

A technology for track management and weak targets, applied in radio wave measurement systems, radio wave reflection/reradiation, measurement devices, etc., can solve the problems of being unable to provide target track information and prone to missed detection

Active Publication Date: 2012-08-01
NAVAL AVIATION UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to propose a weak target tracking method based on particle filter and track management before detection, to solve the problem that the weak target tracking method based on particle filter cannot provide target track information and is prone to missed detection

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  • Dim target track-before-detect method based on particle filter algorithm and track management
  • Dim target track-before-detect method based on particle filter algorithm and track management
  • Dim target track-before-detect method based on particle filter algorithm and track management

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Embodiment Construction

[0095] The method for tracking before detection of a faint target based on particle filter and track management of the present invention will be described in detail below with reference to the accompanying drawings.

[0096] Without loss of generality, set up a two-dimensional simulation scene in which the target moves in a straight line at a uniform speed. Assume that the target has an initial existence probability η 0 =0.05, the target initial intensity is I=20, and its possible minimum and maximum intensity are I min = 10 and I max = 30, the target initial position and initial velocity are (4.2, 7.2) and (0.45, 0.25) respectively, and the possible minimum velocity and maximum velocity are v min = -1 and v max =1, target state transition probability P b =P d = 0.05, target existence probability decision threshold γ = 0.6, the target appears when k = 7, until k = 22 disappears, the process noise intensity is q 1 = 0.001 and q 2 = 0.01; radar scan period T = 1, resoluti...

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Abstract

The invention discloses a dim target track-before-detect method based on a particle filter algorithm and flight path management, and belongs to the field of radar data processing. A dim target track-before-detect method based on the particle filter algorithm has the problems that information of a target flight pass cannot be provided and the phenomenon of detection miss is easy to occur when the signal to noise ratio of the target is relatively low. The dim target track-before-detect method based on the particle filter algorithm and track management, which is provided by the invention, aims to solve the problems. The dim target track-before-detect method based on the particle filter algorithm and track management has the advantages that the structure is simple, the calculation is conducted rapidly, hardware implementation is easy, simultaneously overcomes the limitations of the dim target track-before-detect method based on the particle filter algorithm and then guarantees the continuity of the target flight path through effectively solving the problem of detection miss, thereby having great engineering application value and great popularization prospect.

Description

technical field [0001] The invention relates to a radar data processing method, in particular to a radar detection and tracking method for a weak target. Background technique [0002] With the increasing maturity of target stealth technology and the reduction of target flying altitude, a large number of weak targets such as various stealth aircraft, sea-skimming missiles, and cruise missiles have appeared, which seriously affects the performance of radar target detection and tracking, and at the same time brings a threat to the survival of radar. serious threat. Therefore, it is of great significance to realize the effective detection and tracking of weak targets by radar to improve its combat effectiveness and survivability. At present, many experts and scholars have done a lot of research on the detection and tracking of weak targets. Among them, the weak target tracking method based on particle filter has the advantages of simple processing method, easy hardware implemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66
Inventor 王国宏谭顺成于洪波关成斌贾舒宜曹倩
Owner NAVAL AVIATION UNIV
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