Recording of Quadrature Amplitude-Modulated Signal on Magnetic Recording Channel
Summary :
Recording and reproducing of quadrature amplitude-modulated (QAM) signals on magnetic recording channel of VCR is studied. While the frequency characteristics of QAM signal is nearly matched to that of the magnetic recording channel, the linearization of magnetic transmission channel associated with odd-order nonlinear transfer function is considered to be essential to record QAM signals, and the employment of bias recording method is experimented for this purpose. Simple 16 QAM and coded 32 QAM signals are recorded on an experimental VCR. It is found that the SNR required by coded 32 QAM signal is lower than that by 16 QAM signal for the channel SNR higher than 14 dB. Coded 32 QAM signals of 20 Mbps data rate are recorded and reproduced at a scanning speed of 3.5 m/s using a head of 50 µm track width, and the word error rate less than 10-5 is successfully accomplished.
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- IEICE TRANSACTIONS on transactions Vol.E73-E No.5 pp.665-669
- Publication Date
- 1990/05/25
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- Special Section PAPER (Special Issue on Information Theory and Its Applications)
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Masaaki KOBAYASHI, Haruo OHTA, Etsuto NAKATSU, Hiroaki SHIMAZAKI, Yoshitomi NAGAOKA, "Recording of Quadrature Amplitude-Modulated Signal on Magnetic Recording Channel" in IEICE TRANSACTIONS on transactions,
vol. E73-E, no. 5, pp. 665-669, May 1990, doi: .
Abstract: Recording and reproducing of quadrature amplitude-modulated (QAM) signals on magnetic recording channel of VCR is studied. While the frequency characteristics of QAM signal is nearly matched to that of the magnetic recording channel, the linearization of magnetic transmission channel associated with odd-order nonlinear transfer function is considered to be essential to record QAM signals, and the employment of bias recording method is experimented for this purpose. Simple 16 QAM and coded 32 QAM signals are recorded on an experimental VCR. It is found that the SNR required by coded 32 QAM signal is lower than that by 16 QAM signal for the channel SNR higher than 14 dB. Coded 32 QAM signals of 20 Mbps data rate are recorded and reproduced at a scanning speed of 3.5 m/s using a head of 50 µm track width, and the word error rate less than 10-5 is successfully accomplished.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e73-e_5_665/_p
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@ARTICLE{e73-e_5_665,
author={Masaaki KOBAYASHI, Haruo OHTA, Etsuto NAKATSU, Hiroaki SHIMAZAKI, Yoshitomi NAGAOKA, },
journal={IEICE TRANSACTIONS on transactions},
title={Recording of Quadrature Amplitude-Modulated Signal on Magnetic Recording Channel},
year={1990},
volume={E73-E},
number={5},
pages={665-669},
abstract={Recording and reproducing of quadrature amplitude-modulated (QAM) signals on magnetic recording channel of VCR is studied. While the frequency characteristics of QAM signal is nearly matched to that of the magnetic recording channel, the linearization of magnetic transmission channel associated with odd-order nonlinear transfer function is considered to be essential to record QAM signals, and the employment of bias recording method is experimented for this purpose. Simple 16 QAM and coded 32 QAM signals are recorded on an experimental VCR. It is found that the SNR required by coded 32 QAM signal is lower than that by 16 QAM signal for the channel SNR higher than 14 dB. Coded 32 QAM signals of 20 Mbps data rate are recorded and reproduced at a scanning speed of 3.5 m/s using a head of 50 µm track width, and the word error rate less than 10-5 is successfully accomplished.},
keywords={},
doi={},
ISSN={},
month={May},}
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TY - JOUR
TI - Recording of Quadrature Amplitude-Modulated Signal on Magnetic Recording Channel
T2 - IEICE TRANSACTIONS on transactions
SP - 665
EP - 669
AU - Masaaki KOBAYASHI
AU - Haruo OHTA
AU - Etsuto NAKATSU
AU - Hiroaki SHIMAZAKI
AU - Yoshitomi NAGAOKA
PY - 1990
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E73-E
IS - 5
JA - IEICE TRANSACTIONS on transactions
Y1 - May 1990
AB - Recording and reproducing of quadrature amplitude-modulated (QAM) signals on magnetic recording channel of VCR is studied. While the frequency characteristics of QAM signal is nearly matched to that of the magnetic recording channel, the linearization of magnetic transmission channel associated with odd-order nonlinear transfer function is considered to be essential to record QAM signals, and the employment of bias recording method is experimented for this purpose. Simple 16 QAM and coded 32 QAM signals are recorded on an experimental VCR. It is found that the SNR required by coded 32 QAM signal is lower than that by 16 QAM signal for the channel SNR higher than 14 dB. Coded 32 QAM signals of 20 Mbps data rate are recorded and reproduced at a scanning speed of 3.5 m/s using a head of 50 µm track width, and the word error rate less than 10-5 is successfully accomplished.
ER -
English
