Method for intelligently fusing and detecting distance extension targets based on intrinsic modal characteristic energy

A technology of distance expansion target and feature energy, which is applied in the field of intelligent fusion detection of intrinsic modal feature energy of distance expansion target, and can solve the problem that detection methods cannot be effectively detected.

Active Publication Date: 2014-02-12
NAVAL AVIATION UNIV
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Problems solved by technology

[0004] Under the condition of low signal-to-noise ratio, the weak range extended target is lost in t

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  • Method for intelligently fusing and detecting distance extension targets based on intrinsic modal characteristic energy
  • Method for intelligently fusing and detecting distance extension targets based on intrinsic modal characteristic energy
  • Method for intelligently fusing and detecting distance extension targets based on intrinsic modal characteristic energy

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings. The embodiments of the present invention are used to explain the present invention, rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification and change made to the present invention will fall into the protection scope of the present invention.

[0053] With reference to the accompanying drawings of the description, the specific implementation of the present invention is divided into the following steps:

[0054] Step 1: Perform EMD decomposition on the one-dimensional range image of the radar echo to be detected

[0055] The radar echo one-dimensional range image x=[x(1), x(2) composed of N range unit echo amplitudes (x(t), t=1,...,N) in the area to be detected , ..., x(N)] is sent into the EMD decomposition module (1) for decomposition, specifically including the following steps:

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Abstract

The invention discloses a method for intelligently fusing and detecting radar distance extension targets based on intrinsic modal characteristic energy, and belongs to the field of radar signal processing. To overcome the defect that under the situation that the mixed noise background is unknown, an existing distance extension target counting and detecting method is poor in noise environment adaptability, the invention provides the method for intelligently fusing and detecting the distance extension targets based on intrinsic modal characteristic energy differences. According to the method, initialization or supplement is carried out on a noise characteristic database according to the difference effect on echo one-dimensional distance image different frequency intrinsic modal components from the targets and the actual detecting demands, wherein the average energy ratio of the low frequency component to the high frequency component serves as a benchmark; constant false alarm rate characteristics are kept by fusing the characteristic quantity of auxiliary noise data, and the noise database is updated according to the detecting result; statistical modeling does not need to be carried out on the noise background. The method is especially suitable for detecting fixed or slowly-moving weak distance extension targets, and has very strong false-alarm control ability.

Description

1. Technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to an intelligent fusion detection method for intrinsic mode characteristic energy of a range-extending target. 2. Background technology [0002] Compared with conventional narrow-band low-resolution radars, high-range-resolution radars have larger bandwidths and higher range resolutions, and have obvious advantages in precise detection and imaging, high-precision tracking, and target recognition. It has been widely valued and applied in civil and civilian fields, and has become an important direction of modern radar development. Different from the "point target" of conventional narrow-band radar, the echoes of high-range-resolution radar targets are distributed in different radial range units, presenting a "one-dimensional range image", forming a "range-extended target". The range-extending target signal has strong non-stationary and nonlinear characteristics....

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/2927G01S7/412G01S7/414
Inventor 简涛何友关键苏峰平殿发张韫黄晓冬
Owner NAVAL AVIATION UNIV
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