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Outer radiation source radar direction-finding method and system

An external radiation source radar and external radiation source technology are applied in the field of external radiation source radar direction finding methods and systems, and can solve problems such as poor readability, inaccurate direction finding results, and target loss.

Inactive Publication Date: 2018-07-20
ZHOUKOU NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the theoretical peak sidelobe ratio of the system is -7.9dB. Too high sidelobe will overwhelm the main lobe of the weak scattering point, causing the target to be lost. The readability of the result is poor, resulting in inaccurate direction finding results.

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  • Outer radiation source radar direction-finding method and system
  • Outer radiation source radar direction-finding method and system

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0071] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] figure 1 It is a schematic flow chart of the radar direction finding method for external radiation sources of the present invention. Such as figure 1 As shown, the direction finding method includes:

[0...

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Abstract

The invention discloses an outer radiation source radar direction-finding method and system. The direction-finding method comprises: obtaining a locus function of rotation around a rotation center bya receiver, wherein the receiver rotates around the rotation center in a spiral manner; determining a slope distance process function of a to-be-detected target according to the locus function, wherein the slope distance process function is a process function of an outer radiation source signal reaching the receiver through the to-be-detected target; determining an echo signal according to the slope distance process; constructing a signal identification matrix of a to-be-detected target identification area; and obtaining an azimuth angle of the to-be-detected target according to the echo signal and the signal identification matrix. By employing the direction-finding method and system, the side lobe can be suppressed, the direction-finding effect is improved, the 3dB width can be reduced, and the direction-finding performance is enhanced.

Description

technical field [0001] The invention relates to the field of radar direction finding, in particular to a radar direction finding method and system for an external radiation source. Background technique [0002] At present, the traditional radar direction-finding method generally needs to use large-aperture antennas or long-array antennas. The manufacturing and use costs of the direction-finding system are relatively high, and it occupies a large area and is inconvenient for station deployment. In addition, the traditional radar direction-finding system needs to actively emit electromagnetic waves to illuminate the target, which is easy to be detected by the enemy and suffer firepower. [0003] Recently, a novel direction-finding system for external radiation source radar has appeared. In this system, the receiver performs uniform circular motion around the center of rotation, and its azimuth resolution is 0.36λ / r, where r is the radius of rotation of the receiver. The struc...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 刘玉春朱海王洪雁朱思峰程琳朱磊豆桂平
Owner ZHOUKOU NORMAL UNIV
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