Title :
A new equalizing experiment applying to perpendicular digital VCR using FFT analysis
Author :
Kamijo, Koji ; Taguchi, Ryo ; Miyashita, Eiichi ; Numazawa, Jmji
Author_Institution :
Sci. & Tech. Res. Labs., Japan Broadcasting Corp., Tokyo, Japan
fDate :
7/1/1998 12:00:00 AM
Abstract :
A new method of measuring the transfer function in a magnetic recording channel using FFT analysis has been developed. Based on the transfer function, we have made a practical equalizer with simple RC (Resistor-Capacitor) circuits to equalize a reproduced signal in a perpendicular magnetic recording channel with ring heads into a waveform that satisfies Nyquist´s first criterion. Applying the equalizer to an experimental perpendicular VCR, we have successfully demonstrated a VCR with a byte error rate of 1×10-5 and a recording bit area of 0.9 μm2/bit
Keywords :
Fourier analysis; Nyquist criterion; RC circuits; equalisers; fast Fourier transforms; perpendicular magnetic recording; transfer functions; video recording; video tape recorders; FFT analysis; Nyquist´s first criterion; byte error rate; equalizing experiment applying to perpendicular digital VCR using FFT analysis; magnetic recording channel; perpendicular digital VCR; phase measurement; pseudo-bilayer tape; resistor-capacitor circuits; ring heads; transfer function; two-RC filter equalizer; Equalizers; Frequency; Magnetic analysis; Magnetic circuits; Magnetic heads; Magnetic recording; Perpendicular magnetic recording; Phase measurement; Transfer functions; Video recording;
Journal_Title :
Magnetics, IEEE Transactions on
