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Acousto-optical time-and-space integrating processors for real-time synthetic aperture radar imaging


Haney, Michael William (1986) Acousto-optical time-and-space integrating processors for real-time synthetic aperture radar imaging. Dissertation (Ph.D.), California Institute of Technology.


Acousto-optical processors for Synthetic Aperture Radar (SAR) imaging are presented. The new processors produce images at real-time rates by combining the operations of data collection, storage, and processing into a compact time-and-space integrating (TSI) architecture. In the TSI approach the 2-D SAR imaging problem is decomposed into a cascade of 2 distinct operations: a 1-D spatial integration of light for range compression, and a 1-D temporal integration of light for azimuth compression. These two operations are coupled via a common path interferometric scheme that is insensitive to mechanical vibrations. The results of an experimental characterization of the TSI approach, with simulated point scatterer radar echoes, are reported. The performance issues of interferometric bias removal, dynamic range, and resolution are addressed. The architecture is generalized to correct for range migration and the results of a range walk compensation experiment are presented. A programmable version of the TSI architecture, in which the fixed azimuth reference mask is replaced by an acousto-optic light modulator, is described. The application of the programmable architecture to both strip-map and spot-light mode SAR is analyzed and experimentally verified. Portions of the work discussed in this thesis are also presented in the following publications: 1. D. Psaltis and M. Haney, Book Chapter: "Real-Time Synthetic Aperture Radar Processors," to be published in: Optical Signal Processing, J. Horner ed., Academic Press, 1986. 2. M. Haney and D. Psaltis, "Measurement of the Temporal Coherence Properties of Pulsed Laser Diodes," Appi. Opt., Vol. 24, No.13, July 1985. 3. M. Haney and D. Psaltis, "Acousto-Optic Techniques for Real-time SAR Processing," SPIE Proceedings, Vol. 545, April 1985. 4. M. Haney, K. Wagner, and D. Psaltis, "Programmable Real- time Acousto-Optic/CCD SAR Processor," SPIE Proceedings, Vol. 495, August 1984. 5. D. Psaltis, M. Haney, and K. Wagner, "Real-Time Synthetic Aperture Radar Processing," Proceedings of the NASA Optical Information Processing Conference, August 1983. 6. M. Haney and D. Psaltis, "Coherence Properties of Pulsed Laser Diodes," Proceedings of the 10th International Optical Computing Conference, April 1983. 7. D. Psaltis, K. Wagner, and M. Haney, "Synthetic Aperture Radar Imaging Using Acousto-Optic and Charge Coupled Devices," SPIE Proceedings, Vol. 352, August 1982.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Electrical Engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Thesis Availability:Public (worldwide access)
Thesis Committee:
  • Psaltis, Demetri (chair)
Defense Date:3 February 1986
Record Number:CaltechETD:etd-03192008-121641
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1020
Deposited By: Imported from ETD-db
Deposited On:03 Apr 2008
Last Modified:26 Dec 2012 02:34

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