Study of an extended partial-response, class IV, channel for digital magnetic recording

Yinyi Lin Yinyi Lin,Char-Yuan Yeh Char-Yuan Yeh

doi:10.1109/20.620452

Study of an extended partial-response, class IV, channel for digital magnetic recording

Yinyi Lin Yinyi Lin, Char-Yuan Yeh Char-Yuan Yeh

https://doi.org/10.1109/20.620452

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Journal: IEEE transactions on magnetics	Publication Date: Jan 1, 1997
Citations: 2

Affiliation: National Central University

#Generalized Viterbi Algorithm #PRML System + Show 8 more

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Abstract

In this work, we study an EPR-IV system for high density digital recording and compare it to the PRML recording system. A combinatorial optimization technique that uses the simulated annealing algorithm in conjunction with a descent method is employed for optimization of partial response (PR) equalizers. The gradient algorithm to track variations of timing phase for the EPR-IV channel is investigated. Also, a generalized Viterbi algorithm is used for detecting the EPR-IV system. Simulation results demonstrate that at high recording density, a coding gain over the PRML system can be obtained for the EPR-IV system with a comparable complexity.

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