Coding and decoding method for synthetic aperture radar
A technology of synthetic aperture radar and encoding and decoding method, which is applied in the field of encoding and decoding of synthetic aperture radar, which can solve problems such as ambiguity in azimuth, ambiguity, and inability to select PRF values, and achieve the effect of improving efficiency and reducing difficulty
Active Publication Date: 2018-11-30
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF3 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Therefore, for a synthetic aperture radar installed on an aircraft with a speed of 300m / s, to achieve a range of 250km, the traditional method cannot select a suitable PRF value to ensure neither range nor azimuth ambiguity
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0034] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a coding and decoding method for synthetic aperture radar. The method comprises the following steps of S1, modulating an emission signal according to the farthest action distance of the synthetic aperture radar and the pulse width of the emission signal, and realizing multi-phase coding of the emission signal; and S2, carrying out low-pass filtering on an echo signal corresponding to the emission signal so as to realize multi-phase decoding of the echo signal, wherein the multi-phase coding and multi-phase decoding can restrain orientation blur and distance blur of the synthetic aperture radar. According to the coding and decoding method, the utilization rate of the transmitting power of the synthetic aperture radar is relatively high, the problem that the orientation blur and the distance blur caused by the high-speed far-acting distance is solved, the pressure of subsequent signal processing is reduced, and the synthetic aperture radar on a high-speed platformcan obtain images of a long-acting distance; and meanwhile, the problem of the distance blur and the orientation blur caused by the situation is avoided.
Description
technical field [0001] The invention relates to the field of radar waveform design, in particular to a coding and decoding method for synthetic aperture radar. Background technique [0002] The large-scale synthetic aperture radar system with long action range applied to high-speed platforms is an important development direction of synthetic aperture radar, and the problem faced by this large-scale synthetic aperture radar system is how to ensure the long-range action and large mapping width of the radar Under the premise, the azimuth and range ambiguities are suppressed. [0003] The high-speed operation of the platform will make the azimuth Doppler bandwidth very large. For example: X-band radar (center frequency: 9.5GHz, wavelength: 0.03m) is installed on an aircraft with a flight speed of 300m / s, and the antenna azimuth beamwidth is 2 °, the azimuth bandwidth of the echo signal generated at this time is 698Hz; if the speed of the aircraft is 60m / s, the corresponding ech...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01S13/90
CPCG01S13/90
Inventor 李和平王岩飞徐向辉朱建光赵达伟
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI