MULTI-CHANNEL DATA DETECTION

摘要

Common sample timing control for sample timing of multiple read channels, wherein the signalclocking of the signals received by the multiple read channels are correlated, for example from parallel tracks of magnetic tape that have been written simultaneously. A common sample timing control comprises multiplephase error inputs (91, 92), each indicating phase error of one of the read channels. Logic responsive to the multiple phaseerror inputs is configured to weight and crosscouple the phase error indication of each phase error input withthe phase error indication of each other phase error input, and to apply gain related to the variance of noise of the phase error indications. Feedback logic (141, 142) is responsive to the crosscoupling and is configured to provide a sample timing phase estimate (111, 112) for each read channel.