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A method and device for azimuth echo signal reconstruction

An azimuth signal and echo signal technology, which can be used in measurement devices, reflection/re-radiation of radio waves, radio wave measurement systems, etc.

Active Publication Date: 2016-03-09
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, the signal obtained with the above reconstruction method has poor azimuth ambiguity, and the method is less robust

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  • A method and device for azimuth echo signal reconstruction
  • A method and device for azimuth echo signal reconstruction
  • A method and device for azimuth echo signal reconstruction

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Embodiment Construction

[0072] In the embodiment of the present invention, the energy of the fuzzy signals of each channel is obtained according to the aliased azimuth echo signals; the energy of the fuzzy signals is processed into the form of a covariance-like matrix; the reconstructed The energy of the azimuth echo signal, the principle of reconstructing the azimuth echo signal is based on the azimuth signal of each channel, and the energy of the fuzzy signal is minimized while reconstructing the azimuth echo signal.

[0073] In synthetic aperture radar technology, since the sampling rate of a single channel, that is, the pulse repetition frequency (PRF, Pulse Repetition Frequency) must be greater than the Doppler bandwidth of the azimuth signal, in this case the obtained azimuth signal will not appear aliasing Phenomenon, so a higher PRF can avoid the occurrence of aliasing, but it is difficult to achieve in practical applications due to various reasons.

[0074] In the embodiment of the present i...

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Abstract

The invention discloses a method for reconstructing an azimuth echo signal and further discloses a device for reconstructing the azimuth echo signal. Energy of blurred signals of each channel is acquired according to aliasing azimuth echo signals; the energy of the blurring signals is processed according to the form of covariance matrix classes; energy of the reconstructed azimuth echo signal is acquired according to the covariance matrix classes. Based on the method and device for reconstructing the azimuth echo signal, the azimuth echo signal can be reconstructed, and azimuth ambiguity can also be effectively restrained at the same time.

Description

technical field [0001] The present invention relates to Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) technology, in particular to a method and device for reconstructing an azimuth echo signal. Background technique [0002] At present, azimuth multi-channel technology has a very important application in the field of synthetic aperture radar. Using multi-channel reconstruction technology to reconstruct the aliased azimuth signal is the key to this technology. Therefore, it is very important to study multi-channel azimuth signal reconstruction technology. meaning. [0003] At present, the main multi-channel azimuth signal reconstruction techniques are multi-channel reconstruction filter method and azimuth digital beamforming (DBF, Digital BeamForming) method. The multi-channel reconstruction filter method and the azimuth DBF method are mathematically equivalent. Both of them construct a reconstruction matrix, obtain the weight of the original signal reconstruction ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S13/90
CPCG01S7/2928G01S7/32G01S13/9017G01S13/904
Inventor 王伟王宇邓云凯郭磊徐伟侯丽丽
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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