Mobile compensation process for double-base synthetic aperture radar imaging

A technology of synthetic aperture radar and motion compensation, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measurement devices, etc., can solve the problem of increasing the cost of the bistatic SAR system, the difficulty of detecting the rapid disturbance of the carrier aircraft, and the inaccuracy of parameters advanced questions
CN101458334AInactive Publication Date: 2009-06-17UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2009-06-17
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a motion compensation method for bistatic synthetic aperture radar imaging based on a phase tracking algorithm. In the method, firstly, by designing a set of narrow-band filters, inhibiting the echo effects of the neighboring targets and acquiring the phase position information of the echo signal of strong scattering points, phase position compensation and direction compression are carried out on the neighboring distance unit, thereby acquiring a bistatic SAR imaging result with high accuracy; secondly, extracting bistatic SAR imaging processing parameters by directly using echo data can lower the cost of a bistatic SAR system; in addition, self-focusing technology which utilizes the echo data to process the signals can compensate the effect of the rapid disturbance which is difficult to be detected by a navigation system. The method provides technical supports for the study of advanced high-resolution radar imaging technology.
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Description

technical field

[0001] The invention belongs to the technical field of radar imaging, and in particular relates to the motion compensation technology of Bistatic Synthetic Aperture Radar imaging (Bi-SAR for short). Background technique

[0002] The transmitter and receiver of the bistatic synthetic aperture radar are placed on different platforms. The transmitter emits a signal to irradiate a certain target scene, and the receiver receives the echo signal of the irradiated target scene. The Doppler frequency shift generated by the relative movement of the target is compressed in azimuth to achieve high-resolution imaging of the target in the range direction and azimuth direction respectively.

[0003] Bistatic SAR has many outstanding advantages:

[0004] (1) The non-backscatter information of the target or scene can be obtained, which is beneficial to improve the target recognition performance.

[0005] (2) It has the characteristics of long range, concealment and strong ...

Claims

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