Recursive linear prediction for clock synchronization

An interest in the application of communication techniques to the recovery of information from magnetic recording has lead to an investigation of clock synchronization for these channels. The work presented here demonstrates a means of extracting clocking information using a lattice linear predictor on a received digital data stream, such as seen from a recording channel. The lattice linear predictor accurately follows the transient behavior of the digital symbols and isolates the symbols to form a sync signal suitable for driving a phase-locked-loop. The supression of noise using this technique enables the bandwidth of the locked oscillator to be sufficient to allow rapid tracking of the varying data rate associated with magnetic readback signals.