Zero Phase Start Estimation in Readback Signals

摘要

A data storage system identifies analog-to-digital conversion samples with amplitude below a certain threshold. Remaining samples are grouped according to phase into one or more quadrants. A multi-coordinate with overlapping quadrants is used to further differentiate sample points. The system then computes an average phase for zero phase start estimation.

主权项

1. A computer apparatus comprising:
a processor; memory connected to the processor; and computer executable program code configured to execute on the processor, wherein the computer executable program code is configured to:
receive a plurality of readback signal samples;determine a sin term for each readback signal sample;determine a cos term for each readback signal sample;organize the readback signal samples according to the corresponding sin terms and cos terms; andcompute an input phase based on the organized readback signal samples.