Dechirp receiving method of radar echo signal

A radar echo and receiving method technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large hardware overhead, and achieve the effect of reducing the requirement of high-speed ADC sampling rate, reducing difficulty, and reducing hardware overhead

Active Publication Date: 2014-12-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Dechirp receiving method of radar echo signal
  • Dechirp receiving method of radar echo signal
  • Dechirp receiving method of radar echo signal

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[0051] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0052] The invention performs deskewing processing on the radar echo signal in the digital domain, adopts an ideal digital linear frequency modulation signal a...

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Abstract

The invention provides a dechirp receiving method of a radar echo signal. The method comprises the following steps: A, performing analog-digital conversion for a received radar echo signal in an analog form to obtain a radar echo signal in a digital form; B, generating a reference local oscillator signal in the digital form; C, multiplying the radar echo signal in the digital form by the reference local oscillator in the digital form so as to counteract a secondary phase term of which the frequency linearly changes over time in the digital echo signal and obtain a dot frequency signal related to a target position, thus finishing the dechirp receiving of the radar echo signal. According to the dechirp receiving method of the radar echo signal, a dechirp reference signal in the digital form is adopted, an analog dechirp reference signal can be avoided generating, and therefore, the size, power consumption and interference are reduced while the difficulty and complexity are lowered down.

Description

technical field [0001] The invention relates to the technical field of radar in the electronic industry, in particular to a method for de-slanting reception of radar echo signals. Background technique [0002] Synthetic aperture radar is a kind of remote sensing equipment. It is installed on a mobile platform, and the platform moves in a straight line at a constant speed. The radar repeatedly transmits modulated broadband microwave signals in an equidistant manner, and then receives ground object scattering between two transmission pulses. The echo signal of the ground object is obtained by using matched filter processing and aperture synthesis method to complete the range direction and azimuth direction focusing, and obtain the two-dimensional backscatter coefficient distribution image of the ground object. Synthetic aperture radar has been widely used in military and civilian fields such as military reconnaissance, earthquake relief, surveying and mapping, etc. due to its ...

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Application Information

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IPC IPC(8): G01S7/292
CPCG01S7/292
Inventor 李和平王岩飞张弛韩松徐向辉
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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