Performance evaluation of an adaptive Volterra/Hybrid equalizer for nonlinear ISI in a magneto-optic storage channel

Author

Gupta, Sunil

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Texas, Austin, TX, USA

fYear

2004

fDate

38079

Firstpage

145

Lastpage

148

Abstract

This paper presents performance analysis of an adaptive Volterra/Hybrid equalizer in a nonlinear magneto-optic data storage channel. In a storage system, nonlinear intersymbol interference (ISI) is one of the limiting factors for high storage density. Volterra and Hybrid (combination of linear and Volterra) equalizers are proposed and developed for compensation of it. The use of Volterra/Hybrid equalizers provided an extra 1.3-1.5 dB SNR gain over linear equalizers. Performance and complexity of these equalizers are compared. Convergence issues are also investigated by examining the eigenvalue spread of the covariance matrix. The techniques proposed here are applicable to other communication systems (e.g., wireless, optical) exhibiting nonlinear ISI characteristics.

Keywords

Volterra series; adaptive equalisers; convergence of numerical methods; covariance matrices; intersymbol interference; least mean squares methods; magneto-optical recording; Volterra series; adaptive Volterra-hybrid equalizer; convergence issues; covariance matrix; eigenvalue spread; equalizer complexity; least mean square; nonlinear intersymbol interference; nonlinear magneto-optic data storage channel; performance analysis; Convergence; Covariance matrix; Eigenvalues and eigenfunctions; Equalizers; Gain; Intersymbol interference; Memory; Nonlinear optics; Performance analysis; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Region 5 Conference: Annual Technical and Leadership Workshop, 2004

Print_ISBN

0-7803-8217-X

Type

conf

DOI

10.1109/REG5.2004.1300185

Filename

1300185