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:
Nov. 27, 2007
Filed:
Jan. 11, 2006
Theagenis John Abatzoglou, Huntington Beach, CA (US);
Leo H. Hui, Alhambra, CA (US);
Kwang M. Cho, Los Angeles, CA (US);
Theagenis John Abatzoglou, Huntington Beach, CA (US);
Leo H. Hui, Alhambra, CA (US);
Kwang M. Cho, Los Angeles, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A moving radar () generates a synthetic aperture image from an incomplete sequence of periodic pulse returns. The incomplete sequence of periodic pulse returns has one or more missing pulses. The radar converts the incomplete sequence of pulse returns into a digital stream. A computer () processes the digital stream by computing an along track Fourier transform (), a range compression (), an azimuth deskew () and an image restoration and auto focus (). The image restoration and autofocus () utilizes a low order autofocus (), a gap interpolation using a Burg algorithm (), and a high order autofocus () for generating an interpolated sequence. The interpolated sequence contains a complete sequence of periodic pulse returns with uniform spacing for generating the synthetic aperture image. The image restoration and autofocus () computes a linear prediction coefficients estimate using the Burg Algorithm (). The linear prediction coefficients estimate () is used to compute a weighted forward-backward interpolation to generate the complete sequence of periodic pulse returns ().