Adaptive Symmetrical Interference Equalization
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
A technique is described for providing equalization to a magnetic recording signal. In the past, such equalization or pulse shaping was performed by a fixed equalization circuit. However, at higher recording densities, a single equalizer setting may not adequately compensate the signal across the total variation due to different heads, media and machines. An adaptive equalization loop is described hereinafter for providing equalization. The term "adaptive" is intended to cover compensation in random data without prior knowledge of what the data is, as opposed to other techniques which use "training sequences" or pulses of known data content to vary the amount of equalization.