The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Jul. 09, 2024
Applicant:
National Sun Yat-sen University, Kaohsiung, TW;
Inventors:
Assignee:
NATIONAL SUN YAT-SEN UNIVERSITY, Kaohsiung, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S 7/40 (2006.01); G01S 13/02 (2006.01);
U.S. Cl.
CPC ...
G01S 7/40 (2013.01); G01S 13/02 (2013.01);
Abstract
In a displacement monitoring method based on elliptical trajectory calibration and modified principal component analysis, four channels are compressed into two set signals through linear combination to solve null point issue in Doppler radar and cancel clutter effect. The two sets linear combined signals make two tilted elliptical trajectories which can be calibrated for DC offset, amplitude imbalance and phase imbalance using simple computation. Due to the elliptical trajectories are mirror symmetric tilt ellipses, the residual clutter can be cancelled to recover a clear Doppler phase after demodulation and combination.