Jonathan Darrel Coker

TL;DR: Attention is given to the hybrid nature of the PRML channel; many channel functions are implemented using a combination of both analog and digital circuits.

TL;DR: Simulation results obtained for Lorentzian channels show that a judicious tradeoff between performance and state complexity leads to practical schemes offering substantial performance gains over both PRML and extended PRML detectors.

TL;DR: The performance of magnetic recording systems that include conventional modulation codes combined with multiple parity bits is studied and the sector-error-rate performance of optimum 64-state combined channel/parity detection for the dual-parity code is shown to be approximately 0.1 dB better than that of optimum 32-state Combined Channel/Parity Detection for the single-Parity code.

TL;DR: In this paper, a method and apparatus for measuring flying height changes of a transducer head relative to a disk surface of a rotating disk in a disk file is described. But the method is not suitable for the measurement of flying height change of a single transducerer head.

TL;DR: In this article, a method and apparatus for controlling a digital filter function included in a data path within gain and timing control loops of a PRML magnetic recording channel is presented, and a predetermined gain and a quantized delay at a synchronization frequency are provided when switching from acquisition mode to tracking mode.