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

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...

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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 radar imaging system has a limited array antenna aperture and a wide beam width, which leads to low angular resolution and cannot achieve target detection. Regional High Resolution Imaging Problems

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