SAR-GMTI Clutter Suppression Method in the Descending Section of a Hypersonic Vehicle

A hypersonic and clutter suppression technology, applied to instruments, radio wave measurement systems, etc., can solve problems such as strong ground clutter, difficulties in tracking, imaging and identification, and complex radar motion states, achieving a wide range and benefiting the battlefield The effect of reconnaissance
CN106093870BActive Publication Date: 2018-11-09XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2018-11-09

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Abstract

The invention discloses a method for suppressing SAR-GMTI clutter of a hypersonic vehicle descending branch. The method comprises steps of: establishing a radar motion geometric model of the hypersonic aircraft descending branch, wherein the radar includes N antenna channels, P is any one motion target in a scene where the radar is located, expressing the instantaneous slope distance between the nth antenna channel and the motion target P as Rn(ta) to obtain echo signals of N equivalent phase center channels; acquiring the distance frequency domain-orientation time domain expression form of the echo signals of N equivalent phase center channels subjected to distance compression, performing phase compensation to obtain the distance frequency domain-orientation time domain echo signals of the N equivalent phase center channels subjected to phase compensation, successively computing the echo signals of N equivalent phase center channels of a distance Doppler domain, the echo signal of the motion target P of the distance Doppler domain, and the clutter signal of the distance Doppler domain, computing the optimal weight coefficient vector of time-space adaptive clutter suppression so as to finally obtain the echo signal of the motion target P subjected to clutter suppression.
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Description

technical field

[0001] The invention belongs to the technical field of radar, in particular to a method for suppressing SAR-GMTI clutter in the descending section of a hypersonic vehicle, that is, a method for suppressing synthetic aperture radar-ground moving target detection (SAR-GMTI) clutter in the descending section of a hypersonic vehicle. It is suitable for the suppression of SAR-GMTI clutter in the descending section of hypersonic aircraft, so as to complete the detection of moving targets in SAR imaging. Background technique

[0002] Synthetic Aperture Radar (SAR) imaging technology was first developed in the 1950s, which can simultaneously provide high two-dimensional resolution, including high range resolution and high azimuth resolution, and then be able to image radar targets; Aperture Radar-Ground Moving Target Detection (SAR-GMTI) combined with clutter suppression technology can complete the detection of ground moving targets under the influence of strong grou...

Claims

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