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Three-dimensional space strong maneuvering target tracking method based on intelligent subband filtering

A mobile target tracking, three-dimensional space technology, applied in the reflection/re-radiation of radio waves, radio wave measurement systems, and the use of re-radiation. and response speed, to achieve the effect of tracking processing

Inactive Publication Date: 2017-11-03
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

[0005] The purpose of the present invention is to propose a three-dimensional space strong maneuvering target tracking method based on intelligent sub-band filtering to solve the problem of effective tracking of three-dimensional strong maneuvering targets in adjacent space under the premise that the maximum acceleration of the target and the statistical distribution characteristics of the target acceleration are unknown. question

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  • Three-dimensional space strong maneuvering target tracking method based on intelligent subband filtering

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[0029] Example conditions: Assume that the initial position of the hypersonic strong maneuvering target in the adjacent space is [300km, 300km, 20km], the flight speed is 5000m / s, the radial acceleration is 10g, the tangential acceleration is 5g, and the flight direction is 30 degrees north by west °. Correspondingly, the observation radar is located at the coordinate origin, the radar wavelength is λ=0.15m, the chirp pulse signal width is τ=600μs, the chirp bandwidth is B=1.5MHz, and the radar distance, azimuth and elevation measurement errors are 200m, 0.1 ° and 0.1°, the observation period is 1s. Combined with the manual figure 1 , the specific implementation steps of the present invention are as follows:

[0030] Step 1. Subband decomposition of strong maneuvering target signal: through multi-resolution analysis of fractional Fourier domain filter banks, the primary color noise input signal is decomposed into multiple approximate white noise signals that are not superimp...

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Abstract

The invention discloses a three-dimensional space strong maneuvering target tracking method based on intelligent subband filtering, which belongs to the field of radar target tracking. The method uses an intelligently-adjusted subband filtering idea to effectively realize quick and accurate tracking on maneuvering of an unknown target in three-dimensional space. The method comprises steps: (1) subband decomposition for strong maneuvering target signals is carried out; (2) subband decorrelation for the strong maneuvering target signals is carried out; (3) intelligent subband filtering for the strong maneuvering target signals is carried out; (4) subband fusion for the strong maneuvering target signals is carried out; and (5) steps from the first to the fourth are iterated cyclically until all measuring plots are processed. On the basis of not requiring prior information of target maneuvering characteristics, the method has high tracking precision and reaction speed towards near space target mutation maneuvering, quick and precise tracking can be realized, and engineering realization is facilitated.

Description

technical field [0001] The invention belongs to the field of radar target tracking and is used for solving the problem of precise tracking of highly maneuverable hypersonic aircraft in three-dimensional space. Background technique [0002] Near space usually refers to the airspace 20-100 km from sea level, and near space aircraft refers to atmospheric aircraft that can fly at high speed for a long time in near space. Compared with ordinary aircraft, near-space hypersonic aircraft has the characteristics of fast flight speed (8-20Ma), good maneuverability (10-20g), and strong stealth performance. It can be used for theater reconnaissance, early warning, communication, and global rapid strikes. It can quickly and accurately strike any target in the world within two hours. With the successive emergence of hypersonic vehicles such as X-43 and X-51 in near space, the detection and tracking of hypersonic maneuvering targets in near space has become an urgent problem to be solved....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72G01S7/292
CPCG01S7/2923G01S13/723
Inventor 王国宏李岳峰张翔宇李林于洪波
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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