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Signal processing method and device and computer readable storage medium

A signal processing and signal technology, applied in the field of computer-readable storage media, can solve the problem of a large number of filters

Pending Publication Date: 2021-04-13
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the embodiment of the present invention provides a signal processing method, device and computer-readable storage medium, which solves the problem of the filter required for low-pass filtering processing of multiple channels of data to be processed in the related art A larger number of questions reduces the complexity of the SAR system

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  • Signal processing method and device and computer readable storage medium
  • Signal processing method and device and computer readable storage medium
  • Signal processing method and device and computer readable storage medium

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Embodiment Construction

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0059] An embodiment of the present invention provides a signal processing method, which is applied to a spaceborne synthetic aperture radar system. In the surveying, mapping and imaging application of the spaceborne synthetic aperture radar system, digital beamforming technology can be used to realize multi-channel reception of echo signals in elevation , and process the echo signal. In an embodiment of the present invention, the spaceborne synthetic aperture radar system includes: a transmitting end, a receiving end, and a signal processing device.

[0060] In a feasible implementation, the spaceborne SAR system uses an active phased array antenna with N apertures in the distance direction, each aperture corresponds to a channel, and the transmitting end uses the middle one ...

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Abstract

The embodiment of the invention discloses a signal processing method, which comprises the following steps of: performing frequency reduction processing on a received to-be-processed signal of each channel in a plurality of channels to obtain first signals, performing weighted delay processing on the first signal of each channel to obtain a second signal of each channel, synthesizing the first path of signals of the second signals of the plurality of channels to obtain a first path of synthesized signals, and synthesizing the second path of signals of the second signals of the plurality of channels to obtain a second path of synthesized signals, wherein the third signal comprises a first path of synthetic signal and a second path of synthetic signal; carrying out demodulation synthesis processing on the first path of synthesis signal to obtain a first path of demodulation synthesis signal, and carrying out demodulation synthesis processing on the second path of synthesis signal to obtain a second path of demodulation synthesis signal, wherein the fourth signal comprises a first path of demodulation synthesis signal and a second path of demodulation synthesis signal; and performing low-pass filtering processing on the fourth signal to obtain a target signal. The embodiment of the invention further discloses signal processing equipment and a computer readable storage medium.

Description

technical field [0001] The present invention relates to the field of digital signal processing, in particular to a signal processing method, device and computer-readable storage medium. Background technique [0002] Elevation digital beam forming (Digital Beam Forming, DBF) technology is a new technology established with the development of digital signal processing methods. This technology can not only fully preserve the information collected on the array antenna, but also use complex Digital signal processing methods process signals. In the surveying and imaging application of the spaceborne synthetic aperture radar (SAR) system, the first research is the digital beamforming of the receiving end, that is, the receiving end antenna is divided into multiple sub-apertures; DBF technology is used to divide each sub-aperture (channel ) to synthesize the received signal to be processed, and finally generate the target signal. In the related art, when the DBF technology is used ...

Claims

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Application Information

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IPC IPC(8): H03H17/02
CPCH03H17/02
Inventor 杨元浩王宇杜江王伟王沛禹卫东邓云凯赵庆超陈圳张华春
Owner AEROSPACE INFORMATION RES INST CAS
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