High-resolution detecting and imaging method for real-aperture phased array radar

A phased array radar and imaging method technology, applied in the field of signal processing, can solve the problems of limited array antenna aperture, inability to achieve high-resolution imaging of target areas, wide beam width, etc., to reduce the number of beam scans and the amount of imaging data. Effect

Inactive Publication Date: 2013-11-20
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to propose a real-aperture phased-array radar high-resolution detection and imaging method to solve the problem that the traditional phased-array ra

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Embodiment Construction

[0041] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0042] Step 1. According to the working mode of the phased array radar, perform beam scanning on the entire detection scene, and obtain the echo signal column vector after time-domain sampling at each scanning angle

[0043] 1a) When the scanning beam points to the first azimuth scanning angle θ 1 and the first pitch angle scan angle When , the phased array radar receives the echo signal and samples it in the time domain to obtain the column vector of the echo signal after discretization sampling at the scanning angle

[0044] 1b) According to figure 2 According to the distance of the target scene and the size of the target scene, determine the scanning angle range of the azimuth and elevation angles of the detection target scene area, and combine the beam main lobe width and detection distance to calculate the angle of the target scene area covered by a single beam...

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Abstract

The invention discloses a high-resolution detecting and imaging method for a real-aperture phased array radar, and mainly solves the problem that the conventional phased array radar imaging system cannot image a target region with high resolution due to lower angle resolution. The high-resolution detecting and imaging method comprises the following implementation steps of (1) acquiring an echo signal according to a working mode of the phased array radar; (2) constructing an observation matrix in an ideal form of the echo signal; (3) constructing a phased array radar imaging model according to a relation between the echo signal and the observation matrix; (4) converting the radar imaging model into an optimization model by a regularization method according to prior information of the sparseness of a contour of a target scene; and (5) converting the restraint optimization model into a non-restraint optimization expression and obtaining a final imaging result by an alternating direction iteration method. According to the high-resolution detecting and imaging method, the detecting and imaging times and the detection data can be reduced, and high-resolution imaging for the target region with an obvious contour characteristic can be realized; and the high-resolution detecting and imaging method can be used for target identification.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a phased array radar detection and imaging method, which can be used for target recognition. technical background [0002] Phased array radar is composed of multiple radiation sources, the feed and gain of each radiation source can be flexibly controlled by the computer, and the digital beamforming technology can make it have a strong beam changing ability, and can flexibly realize search, Identification, tracking, guidance, passive detection and other functions. At the same time, it also has the advantages of large target capacity, strong adaptability to complex environments, and good anti-interference performance. Therefore, phased array radar has been widely used in many fields. [0003] Phased array radar real-aperture imaging RBM is the earliest radar imaging system, and it is also the earliest imaging method used for forward-looking. The advantage of the real-ap...

Claims

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Application Information

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IPC IPC(8): G01S13/89G01S7/41
Inventor 赵光辉王雪磊石光明李超刘自成温超
Owner XIDIAN UNIV
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