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Deskewing one-bit acquisition method and system for wideband radar echo

A broadband radar and acquisition method technology, applied in the field of signal processing, can solve problems such as poor imaging quality, achieve the effects of reducing processing capacity and hardware costs, improving imaging quality, and improving work efficiency

Active Publication Date: 2021-04-13
SHENZHEN UNIV
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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method and system for deskewing one-bit acquisition of broadband radar echoes, aiming to solve the problem of poor imaging quality due to high-order harmonics brought about by traditional one-bit quantization

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  • Deskewing one-bit acquisition method and system for wideband radar echo
  • Deskewing one-bit acquisition method and system for wideband radar echo
  • Deskewing one-bit acquisition method and system for wideband radar echo

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Embodiment Construction

[0052] The present invention provides a deskewing one-bit acquisition method and system of broadband radar echo. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0053] figure 1 It is a schematic flow chart of a deskewing one-bit collection method of wideband radar echo in this embodiment. Such as figure 1 As shown, the steps of the deskewing one-bit acquisition method of broadband radar echoes include:

[0054] S10 , performing deskewing pulse pressure processing on the target echo signal to obtain a deskewed echo signal.

[0055] Specifically, the imaging radar transmits a chirp pulse to the scene of the detected target through the antenna. After the chirp pulse propagates to the detected target, it is...

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Abstract

The present invention provides a deskewing one-bit acquisition method and system for wideband radar echoes. The deskewing one-bit acquisition method includes: performing frequency shift processing on the deskewed echo signal processed by the deskewing pulse pressure to obtain A frequency-shifted echo signal; performing sampling processing on the frequency-shifted echo signal to obtain a signal in which the high-order harmonic spectrum is separated from the de-ramped echo spectrum; Perform one-bit quantization processing on the wave-spectrum-separated signal to obtain echo data, the frequency offset coefficient of the frequency shift processing and the sampling frequency of the sampling processing are all determined according to the maximum frequency in the de-skewed echo signal, so that the de-skewing The frequency band of the oblique echo signal and the frequency band of the high-order harmonic can be effectively separated, reducing the impact of the high-order harmonic on the imaging quality, improving the imaging quality of the radar, and reducing the amount of data processing and hardware costs. ,Improved work efficiency.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a deskewing one-bit acquisition method and system for broadband radar echo. Background technique [0002] Synthetic Aperture Radar (SAR) has all-weather, all-time long-distance and high-resolution detection capabilities, and plays an important role in remote sensing mapping, regional monitoring, geological exploration, disaster relief and other fields. However, with the continuous increase of radar signal bandwidth, the burden of SAR data acquisition, transmission and processing is also increasing. One-bit quantization of the original echo signal can greatly reduce the amount of data in imaging processing and improve work efficiency, but the traditional one-bit sampling quantization will cause the data to continuously jump between 1 and -1, thus introducing the original The high-order harmonics of the signal reduce the imaging quality of the radar. [0003] G. Frances...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/90Y02A90/10
Inventor 黄磊黄聪赵博杨广玉查林
Owner SHENZHEN UNIV