Loading [MathJax]/extensions/MathMenu.js
Matched filter limits and code performance in digital magnetic recording | IEEE Journals & Magazine | IEEE Xplore

Matched filter limits and code performance in digital magnetic recording


Abstract:

Presents a method for evaluating the performance of recording channels and codes for systems with additive spectral Gaussian noise. Starting with a noise-whitened isolate...Show More

Abstract:

Presents a method for evaluating the performance of recording channels and codes for systems with additive spectral Gaussian noise. Starting with a noise-whitened isolated pulse, matched filters are calculated for the amplitude and timing channels which have the maximum signal-to-noise ratio (SNR) and minimum jitter, respectively. In high-density recording systems, the pulse slimming equalization required to control intersymbol interference degrades the SNR and jitter. For the timing channel, a detector SNR is defined whose error statistics are nearly identical to the amplitude channel SNR. Procedures for calculating losses relative to the matched filter SNR are developed that facilitate performance comparisons of both channels. A series of runs for the Lorentzian input pulse and cos/sup n/ equalized output pulses compares the performance of several modulation codes and detection techniques. Write equalization and partial response type four equalization are examined.<>
Published in: IEEE Transactions on Magnetics ( Volume: 27, Issue: 6, November 1991)
Page(s): 4594 - 4599
Date of Publication: 06 August 2002

ISSN Information:


References

References is not available for this document.