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US 6,549,354 B1Granted
Acquisition signal error estimator
AssigneeInfineon Technologies North America Corp.
InventorsJonathan Ashley, Stephen J. Franck, Razmik Karabed
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Abstract
A system and method for acquisition signal error estimation is provided which uses one or more past values of the sequence to determine the nearest ideal sample value. According to one embodiment, four consecutive samples are used. According to another embodiment, two samples are used. The acquisition signal error estimator maybe used in conjunction with gain, DC offset, or magneto-resistive asymmetry control loops in a sampled amplitude read channel.
Claims8
A sampled amplitude read channel, comprising:
- means for receiving an input signal, said input signal approximating an ideal signal;
- a magnetic recording channel;
- an acquisition signal error estimator configured to estimate said ideal signal based on a plurality of samples of said input signal and determine a gain error based on a sum of squares of current and previous samples of said signal;
- and
- means for adjusting a signal output from said magnetic recording channel based on an output of said acquisition signal error estimator.
2 more elements
An acquisition signal error method, comprising:
- receiving an input signal, said input signal approximating an ideal signal;
- generating an estimate of said ideal signal based on a plurality of samples of said input signal and determining a gain error based on a sum of squares of current and previous samples of said signal;
- and
- adjusting a signal output from a magnetic recording channel based on said estimate of said ideal signal.
1 more element
Dependencies are inferred from the claim text.