Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1997-06-13
1999-10-12
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
375341, H04B 110
Patent
active
059664150
ABSTRACT:
A sampled amplitude read channel for disk storage systems is disclosed which asynchronously sub-samples an analog read signal significantly below the Nyquist rate (the baud rate) in order to increase the effective data rate without increasing the frequency of the sampling device. Interpolated timing recovery up-samples the asynchronous samples to generate sample values synchronized to the baud rate, and a Viterbi sequence detector detects the recorded digital data from the synchronous sample values. To compensate for the time-varying characteristics of the recording device, a discrete-time equalizer adaptively equalizes the asynchronous sample values using a least mean square (LMS) adaptive algorithm,
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Bliss William G.
Reed David E.
She Sian
Chin Stephen
Cirrus Logic Inc.
Ghayour Mohammad
Sheerin Howard H.
Shifrin Dan A.
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