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Proceedings Paper

Method for amplitude response estimation in quadratic channels
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Paper Abstract

Like other coherent optical storage channels, a volume holographic storage channel is a quadratic channel since its output is a function of the magnitude-square of the light incident on the photo-detector array. Because of such intensity detection, the sign/phase information at the output is destroyed which makes the estimation of the amplitude response difficult. In this paper, we present a new method called modified least mean squares (MLMS) method to estimate the amplitude channel response of a volume holographic storage channel in the presence of quadratic non-linearity. Numerical simulations show that MLMS is very effective in estimating the amplitude response of such channels under even severe loss of sign information.

Paper Details

Date Published: 10 January 2002
PDF: 6 pages
Proc. SPIE 4342, Optical Data Storage 2001, (10 January 2002); doi: 10.1117/12.453415
Show Author Affiliations
Mehmet Keskinoz, Carnegie Mellon Univ. (United States)
Bhagavatula Vijaya Kumar, Carnegie Mellon Univ. (United States)


Published in SPIE Proceedings Vol. 4342:
Optical Data Storage 2001

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