The phase gradient autofocus algorithm: An optimal estimator of the phase derivative

Technical Report · Fri Sep 01 00:00:00 EDT 1989

DOI:https://doi.org/10.2172/5609345· OSTI ID:5609345

Eichel, P. H.

The phase gradient algorithm represents a powerful new signal processing technique with applications to aperture synthesis imaging. These include, for example, synthetic aperture radar phase correction and stellar image reconstruction. The algorithm combines redundant information present in the data to arrive at an estimate of the phase derivative. In this report, we show that the estimator is in fact a linear, minimum variance estimator of the phase derivative. 7 refs.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5609345
• Report Number(s): SAND-89-0761; ON: DE90000895
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
SYNTHETIC-APERTURE RADAR
FOCUSING
ALGORITHMS
AUTOMATION
IMAGE PROCESSING
IMAGES
MATHEMATICAL MODELS
PHASE SHIFT
MATHEMATICAL LOGIC
MEASURING INSTRUMENTS
PROCESSING
RADAR
RANGE FINDERS
440300* - Miscellaneous Instruments- (-1989)
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)