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Proceedings Paper

Self-phasing optical heterodyne arrays using the weighted least squares spatial correlation algorithm
Author(s): E. Hesham Attia
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Paper Abstract

The spatial correlation algorithm (SCA) corrects for severe array phase distortion without requiring finding a source of opportunity within the target area for possible phase conjugation. The algorithm predicts and corrects aperture distortion using the spatial correlation properties of range-resolved target or backscatter returns.Also, target rotation may be exploited. The SCA is capable of correcting arbitrarily large phase errors that can be totally independent from one array element to another. We extended the algorithm to 2D optical array geometries. The resulting weighted lease squares 2D SCA is optimal. Combined with a new phase-unwrapping technique, the solution is direct, in the sense that it works all differential phase measurements simultaneously. Results of an extensive statistical analysis characterizing the gain of the mainlobe of the resulting point spread function are also presented.

Paper Details

Date Published: 8 June 1994
PDF: 12 pages
Proc. SPIE 2120, Laser Beam Propagation and Control, (8 June 1994); doi: 10.1117/12.177687
Show Author Affiliations
E. Hesham Attia, GORCA Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 2120:
Laser Beam Propagation and Control
Hugo Weichel; Lewis F. DeSandre, Editor(s)

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