Maximum likelihood detection of asynchronous servo data employing interpolation

摘要

repeatable run-out (RRO) detector RRO address mark (AM) and RRO asynchronous data showing one or more digital interpolator for interpolating the sample values, for detecting a maximum likelihood asynchronous AM RRO (AML) is adopted the detector, and the RRO RRO data decoder for decoding the data group. The AML detector is employed to detect the peak of a series of RRO AM based on the detection of the entire sequence of the observed peak, such as the Viterbi (Viterbi) algorithm, AML algorithm. AML detection selects one of the closest interpolated sample sequence in an asynchronous or a great distance to the sample sequence RRO AM. Once the RRO AM is detected, the detector provides a signal AML RRO AM detected by a selected one of the sample as well as the sequence having the best phase for decoding data by detecting the RRO.