Method for amplitude response estimation in quadratic channels

Mehmet Keskinoz; Bhagavatula Vijaya Kumar

doi:10.1117/12.453415

10 January 2002 Method for amplitude response estimation in quadratic channels

Mehmet Keskinoz, Bhagavatula Vijaya Kumar

Proceedings Volume 4342, Optical Data Storage 2001; (2002) https://doi.org/10.1117/12.453415
Event: Optical Data Storage, 2001, Santa Fe, NM, United States

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.

Citation Download Citation

Mehmet Keskinoz and Bhagavatula Vijaya Kumar "Method for amplitude response estimation in quadratic channels", Proc. SPIE 4342, Optical Data Storage 2001, (10 January 2002); https://doi.org/10.1117/12.453415

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