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Transceiving system of synthetic aperture radar with super-high resolution

A synthetic aperture radar and transceiver system technology, applied in the field of synthetic aperture radar, can solve problems such as wideband distortion compensation and distance weighting difficulties, narrow surveying and mapping bandwidth, etc., to achieve lower sampling requirements and timing clock requirements, effectively reduce bandwidth, and reduce performance required effect

Inactive Publication Date: 2011-11-09
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

This method can effectively reduce the sampling rate and the difficulty of time-frequency processing, which is beneficial to the real-time imaging of the system, but the disadvantage is that compared with the direct demodulation method, the surveying and mapping bandwidth is narrow, and broadband distortion compensation and distance weighting are more difficult.

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  • Transceiving system of synthetic aperture radar with super-high resolution
  • Transceiving system of synthetic aperture radar with super-high resolution
  • Transceiving system of synthetic aperture radar with super-high resolution

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Embodiment Construction

[0030] The present invention realizes the sending and receiving process of ultra-wideband signals by adopting single-channel broadband transmission and multi-channel superheterodyne reception, and realizes SAR by performing overlapping channelized reception on ultra-wideband signals, and then synthesizing digital broadband signals at the back end Radar ultra-high resolution imaging requirements.

[0031] The ultra-high-resolution synthetic aperture radar transceiver system of the present invention includes: a high-power transmitter 1, a broadband radar signal generator 2, a receiving front end 3, a broadband power divider 4, a multi-channel receiving unit 5, and a multi-band frequency synthesizer 6 . in:

[0032] The output end of the wideband radar signal generator 2 is connected to the input end of the high-power transmitter 1, the output end of the receiving front end 3 is connected to the input end of the wideband power divider 4, and the output end of the wideband power ...

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Abstract

The invention discloses a transceiving system of synthetic aperture radar with super-high resolution. The output end of a broadband radar signal generator is connected with the input end of a high-power transmitter; the input end of the front receiving end receives a super broadband radar echo signal; the output end of the front receiving end is connected with the input end of a broadband power distributor; the output end of the broadband power distributor is connected with the input end of a multi-channel receiving unit; clock signals of the broadband radar signal generator and local oscillators of the multi-channel receiving unit are all provided by a multi-band frequency synthesizer. The transceiving system is particularly suitable for the synthetic aperture radar with super-high resolution and can transceive a radar image of which the resolution is 0.1m.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar, and in particular relates to a transceiving system applied to ultra-high resolution synthetic aperture radar (SAR). Background technique [0002] As an advanced detection tool, radar has the ability to acquire target information all-day, all-weather, and long-distance. Especially with the development of science and technology, broadband microwave technology and modern signal processing methods are becoming more and more mature. Modern radar can not only locate, monitor and track targets, but also realize the detection of objects such as aircraft, ships, space targets and the ground surface. imaging. The radar image is reconstructed according to the electromagnetic scattering characteristics of the scene (target) irradiated by the radar. It contains information about the structure of the target, so that the identification and classification of the target can be realized. Ground ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28G01S7/282G01S7/285
Inventor 贾颖新王岩飞周以国赵风华
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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