SAR AUTOFOCUS FOR GROUND PENETRATION RADAR
First Claim
1. A method of synthetic aperture radar autofocus for ground penetration radar (100), the method comprising:
- transmitting a signal via an antenna (102);
receiving a reflected signal comprising a plurality of image blocks via the antenna (102);
reading each image block from the reflected signal (602) via a processor (108);
locating prominent targets in each image block (604) via the processor (108);
estimating ground penetration phase error (606) via the processor (108) in each image block via phase error inputs (608) comprising pulling range and quantization level by generating a 1D phase error (706) and converting the 1D phase error into a 2D phase error of an image spectra (708);
refocusing each image block according to estimated ground penetration phase error for that image block (610) via the processor (108); and
forming an image mosaic comprising each refocused image block (614) via the processor (108).
1 Assignment
0 Petitions
Accused Products
Abstract
A method of synthetic aperture radar autofocus for ground penetration radar (100). The method includes transmitting a signal via an antenna (102); receiving a reflected signal comprising a plurality of image blocks via the antenna (102); reading each image block from the reflected signal (602) via a processor (108); locating prominent targets in each image block (604) via the processor (108); estimating ground penetration phase error (606) via the processor (108) in each image block via phase error inputs (608) including pulling range and quantization level by generating a 1D phase error (706) and converting the 1D phase error into a 2D phase error of an image spectra (708); refocusing each image block according to estimated ground penetration phase error for that image block (610) via the processor (108); and forming an image mosaic comprising each refocused image block (614) via the processor (108).
-
Citations
4 Claims
-
1. A method of synthetic aperture radar autofocus for ground penetration radar (100), the method comprising:
-
transmitting a signal via an antenna (102); receiving a reflected signal comprising a plurality of image blocks via the antenna (102); reading each image block from the reflected signal (602) via a processor (108); locating prominent targets in each image block (604) via the processor (108); estimating ground penetration phase error (606) via the processor (108) in each image block via phase error inputs (608) comprising pulling range and quantization level by generating a 1D phase error (706) and converting the 1D phase error into a 2D phase error of an image spectra (708); refocusing each image block according to estimated ground penetration phase error for that image block (610) via the processor (108); and forming an image mosaic comprising each refocused image block (614) via the processor (108). - View Dependent Claims (2)
-
-
3. A system for synthetic aperture radar autofocus for ground penetration radar (100), the system comprising:
-
an antenna (102) for transmitting a signal and for receiving a reflected signal comprising a plurality of image blocks; and a processor (108) programmed to; read each image block from the reflected signal (602); locate prominent targets in each image block (604); estimate ground penetration phase error (606) in each image block via phase error inputs (608) comprising pulling range and quantization level by generating a 1D phase error (706) and converting the 1D phase error into a 2D phase error of an image spectra (708); refocus each image block according to estimated ground penetration phase error for that image block (610); and form an image mosaic comprising each refocused image block (614). - View Dependent Claims (4)
-
Specification