Title :
Study of an extended partial-response, class IV, channel for digital magnetic recording
Author :
Lin, Yinyi ; Yeh, Char-Yuan
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan
fDate :
9/1/1997 12:00:00 AM
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
Keywords :
Viterbi detection; digital magnetic recording; partial response channels; simulated annealing; EPR-IV system; Viterbi detection; coding; combinatorial optimization; descent method; equalizer; extended partial-response class IV channel; gradient algorithm; high density digital magnetic recording; simulated annealing; timing phase; Active filters; Delay; Design optimization; Digital magnetic recording; Equalizers; Low pass filters; Optimization methods; Signal analysis; Simulated annealing; Transfer functions;
Journal_Title :
Magnetics, IEEE Transactions on
