Title :
A simulation study of adaptive reception schemes for high-density digital magnetic storage
Author :
Bergmans, Jan W M ; Mita, Seiichi ; Izumita, Morishi
Author_Institution :
Hitachi Ltd., Tokyo, Japan
fDate :
1/1/1991 12:00:00 AM
Abstract :
At high information densities, digital magnetic recording systems may be seriously hampered by channel imperfections such as intersymbol interference, noise, fading, nonlinearities, crosstalk, and overwrite noise. For such compound disturbance constellations, theoretical analysis of receiver performances becomes difficult. As an alternative, the digitized output signal of an experimental high-density digital videotape recorder is used to compare various promising receiver types by simulation. Apart from adaptive versions of the linear and decision feedback equalizers, adaptive variants of the Viterbi detector are studied, including new ones with resistance to nonlinearities and channel fading. Improvements of up to about 5 dB in effective signal-to-noise ratio over nonadaptive linear equalization are found to be within reach under worst-case operating conditions
Keywords :
interference (signal); intersymbol interference; magnetic disc storage; magnetic recording; random noise; signal detection; Viterbi detector; adaptive reception schemes; channel imperfections; crosstalk; digital videotape recorder; digitized output signal; effective signal-to-noise ratio; fading; high-density digital magnetic storage; intersymbol interference; noise; nonlinearities; overwrite noise; simulation study; Crosstalk; Decision feedback equalizers; Detectors; Digital magnetic recording; Fading; Intersymbol interference; Magnetic analysis; Magnetic noise; Performance analysis; Viterbi algorithm;
Journal_Title :
Magnetics, IEEE Transactions on