Title :
Amplitude margin analysis in high density disk recording using a pseudo-random sequence
Author :
Yeh, Nan-Hsiung ; Wachenschwanz, David
Author_Institution :
Komag Inc., Milpitas, CA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
In a recording system employing a sampling detector such as PRML, amplitude margin is a figure of merit to determine the ultimate bit error rate (BER) performance. Analysis of amplitude margin is useful in allocating the error budget and optimizing the component design. In this study, the amplitude mean square error (MSE) and sequence amplitude margin (SAM) are analyzed through a pseudo-random sequence (PRS) recording. The influence of noise, inter-symbol interference (ISI), nonlinear distortion (NLD), precompensation, and overwrite on the amplitude margin is systematically characterized and investigated. The track edge effect of isotropic and oriented media is also compared and discussed
Keywords :
intersymbol interference; magnetic disc storage; magnetic recording noise; maximum likelihood detection; partial response channels; PRML; amplitude margin analysis; bit error rate; high density disk recording; inter-symbol interference; isotropic media; mean square error; nonlinear distortion; oriented media; overwrite; precompensation; pseudo-random sequence; sampling detector; sequence amplitude margin; track edge effect; Bit error rate; Design optimization; Detectors; Disk recording; Finite impulse response filter; Gaussian distribution; Histograms; Intersymbol interference; Mean square error methods; Noise level; Nonlinear distortion; Preamplifiers; Sampling methods; Signal analysis; Viterbi algorithm;
Journal_Title :
Magnetics, IEEE Transactions on
