Microwave photonic radar fully polarimetric radar detection method and microwave photonic fully polarimetric radar

Abstract

The invention discloses a microwave photonic radar fully polarimetric radar detection method. The method includes the following steps that: 1, up-conversion processing is performed on optical carriers, complex baseband signals and radio frequency local oscillation signals in an optical domain, so that two orthogonal paths of radio frequency signals, and one path of optical reference signals are generated; 2, the two orthogonal paths of radio frequency signals are respectively sent to a horizontal polarization antenna and a vertical polarization antenna, and the horizontal polarization antennaand the vertical polarization antenna radiate two orthogonal paths of polarized electromagnetic waves, so that the polarized electromagnetic waves irradiate a target, and the horizontal polarization antenna and the vertical polarization antenna receive the echoes of the target, so that two paths of echo signals are obtained; and 3, the two paths of echo signals and the optical reference signals are subjected to deramp and polarization response separation processing in the optical domain, so that four paths of intermediate-frequency analog electrical signals corresponding to four elements in atarget polarization scattering matrix are obtained; and 4, the four paths of intermediate-frequency analog electrical signals are processed, so that target detection information can be obtained. The invention also discloses a microwave photonic radar fully polarimetric radar. With the microwave photonic radar fully polarimetric radar detection method and the microwave photonic fully polarimetric radar of the invention adopted, a problem that the bandwidth of a fully polarimetric radar is limited, the problem of the structural complexity of the fully polarimetric radar and a problem that it isdifficult for the fully polarimetric radar to realize instantaneous measurement can be solved.

Description

technical field [0001] The invention relates to a microwave photon new system radar system, in particular to a microwave photon full polarization radar detection method and a microwave photon full polarization radar. Background technique [0002] Radar is an important means for human beings to perceive the environment by using radio waves, and it has a wide range of applications in military and civilian fields. In recent years, fields such as battlefield reconnaissance, remote sensing mapping, environmental monitoring, and unmanned driving have put forward huge demands for high-resolution target detection and imaging, which requires radars to have broadband capabilities. However, traditional microwave technology encounters huge challenges in realizing functions such as broadband signal generation and processing, and it is difficult to meet the technical requirements of high-resolution radar. Microwave photonics technology, which has emerged in recent years, realizes the gen...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a microwave photon full-polarization radar detection method, which can effectively solve the problem of full-polarization Radar bandwidth is limited, the structure is complex, and it is difficult to measure instantaneously

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