Synthetic aperture radar system based on alternating pulse group receiving and transmitting

A synthetic aperture radar, pulse group technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem of signal saturation at short range, and achieve weight reduction, weight reduction, and reliability. Sex-enhancing effect

Active Publication Date: 2014-04-16
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0008] In order to overcome the existing problems of traditional synthetic aperture radar, a synthetic aperture radar system and its implementation method based on alternating pulse groups of sending and receiving proposed by the present invention have the same operating distance as traditional synthetic aperture radar radar system, and at the same time can take into account the near effect The problem of distance signal saturation

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  • Synthetic aperture radar system based on alternating pulse group receiving and transmitting
  • Synthetic aperture radar system based on alternating pulse group receiving and transmitting
  • Synthetic aperture radar system based on alternating pulse group receiving and transmitting

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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments of a synthetic aperture radar system based on sending and receiving alternating pulse groups, and with reference to the accompanying drawings.

[0024] Such as figure 1 Shown is the synthetic aperture radar system of the present invention based on sending and receiving alternate pulse groups, the system includes a radar integrated electronic unit and a data processing unit, wherein: the radar integrated electronic unit generates and radiates alternating pulse group radio frequency signals, and receives ground objects scattered back at the same time The weak signal is amplified and filtered to obtain the echo signal; the data processing unit collects the echo signal in real time and converts the obtained pulse group echo into a single pulse echo signal through waveform reor...

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Abstract

The invention discloses a synthetic aperture radar system based on alternating pulse group receiving and transmitting. The synthetic aperture radar system is composed of a radar comprehensive electronic unit and a data processing unit. The radar comprehensive electronic unit generates and radiates alternating pulse group radar signals and receives echo signals dispersed by surface features; the data processing unit, in real time, collects the echo signals processed by a receiver to complete the conversion from the alternating pulse group echo waves to single pulse echo signals; lastly, by means of an imaging algorithm, the radar image of a mapped region can be obtained. The synthetic aperture radar system based on alternating pulse group receiving and transmitting reduces the peak power of a transmitter, meanwhile guarantees the maximum action distance of the radar and solves the problem of saturation of near field echo signals under the condition of wide swath.

Description

technical field [0001] The invention relates to the field of synthetic aperture radar (Synthetic Aperture Radar-SAR), in particular to a synthetic aperture radar system based on sending and receiving alternating pulse groups. Background technique [0002] Synthetic aperture radar system is a microwave remote sensing imaging equipment. It can obtain two-dimensional scattering coefficient distribution images of ground objects, and has the advantages of working all day and all day long. It is widely used in various fields such as national defense and civil use, and has played a huge role. [0003] Synthetic aperture radar generally uses linear frequency modulated pulse signal as the transmission signal, and then obtains high resolution in the range direction through pulse compression technology. This technology can greatly reduce the peak power of the radar transmitter (from MW level to KW level), That is, the same range can be obtained by using linear frequency modulation sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S7/28G01S13/0209G01S13/90
Inventor 李和平王岩飞刘畅韩松徐向辉周长义张建龙
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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