Title :
Performance evaluation of an adaptive Volterra/Hybrid equalizer for nonlinear ISI in a magneto-optic storage channel
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas, Austin, TX, USA
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;
Conference_Titel :
Region 5 Conference: Annual Technical and Leadership Workshop, 2004
Print_ISBN :
0-7803-8217-X
DOI :
10.1109/REG5.2004.1300185
