Regular Paper

[OPTICAL REVIEW Vol. 21, No. 5 (2014) 563-567]
© 2014 The Japan Society of Applied Physics

Sparse Modeling of Super-Resolution Near-Field Structure Read-Out Signals

Woosik MOON1, Sungbin IM1*, and Taehyung PARK2

1TC Lab., School of Electronic Engineering, Soongsil University, Seoul 156-743, Korea
2Department of Industrial and Information Systems Engineering, Soongsil University, Seoul 156-743, Korea

(Received November 30, 2013; Accepted May 15, 2014)

In this study, super-RENS disc read-out signals were modeled with various nonlinear models. In the results of modeling the nonlinearity, DC offset, and domain bloom phenomena of the super-RENS channel with a second-order Volterra filter, it was identified that the number of significant quadratic coefficients was relatively small. Therefore, a sparse Volterra model and a truncated Volterra model are applied to effectively model the nonlinear channel. In addition, the Hammerstein-type asymmetric conversion model is employed to model the nonlinear channel for the purpose of comparison. The results demonstrate that the sparse model of a simplified polynomial form achieves good modeling performance for the super-RENS disc read-out signals.

Key words: asymmetry model, sparse model, super-RENS, Volterra model


*E-mail address: sbi@ssu.ac.kr

 

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