Asynchronous interpolated servo detection algorithms

Recording systems for disk drives read and detect data from tracks consisting of "read" data sectors and "servo" sectors between read sectors. In this work, we (1) present a new asynchronous servo detection algorithm based on interpolation (2) quantitatively demonstrate improvements in performance of the asynchronous algorithm over the prior synchronous algorithm in the presence of moderate to high RI. Lastly, we propose to use an asynchronous algorithm, which dispenses with the baud rate timing loop and uses an asynchronously sampled ADC output for servo detection.