Correlation receiver for demodulating servo track information
First Claim
1. A method for detecting peaks of a correlation signal, the method comprising:
- determining whether an amplitude of a pulse of the correlation signal exceeds by at least a first delta value an amplitude of a prior peak; and
if so, setting an amplitude of a new peak as the amplitude of the prior peak increased by a second delta value, wherein the second delta value is a value of an increasing function of the time between the prior peak and the pulse.
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Abstract
A correlation receiver, among other functions, detects peaks of a correlation signal. The correlation receiver includes a master peak detector for determining whether an amplitude of a pulse of the correlation signal exceeds by at least a first delta an amplitude of a prior peak. If so, the master peak detector designates the pulse as a peak and sets an amplitude of the peak as the amplitude of the prior peak increased by a second delta. The master peak detector may also determine whether the amplitude of the correlation signal pulse falls below an amplitude of the prior peak less a droop value; and, if so, the master peak detector does not designate the pulse as a peak.
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Citations
46 Claims
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1. A method for detecting peaks of a correlation signal, the method comprising:
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determining whether an amplitude of a pulse of the correlation signal exceeds by at least a first delta value an amplitude of a prior peak; and if so, setting an amplitude of a new peak as the amplitude of the prior peak increased by a second delta value, wherein the second delta value is a value of an increasing function of the time between the prior peak and the pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A correlation receiver for detecting peaks of a correlation signal, the correlation receiver comprising:
a master peak detector for determining whether an amplitude of a pulse of the correlation signal exceeds by at least a first delta value an amplitude of a prior peak; and
, if so, setting an amplitude of a new peak as the amplitude of the prior peak increased by a second delta value, wherein the second delta value is a value of an increasing function of the time between the prior peak and the pulse.- View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for detecting a pulse input signal comprising:
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bandpass filtering the input signal with a bandpass filter having a transfer function; correlation filtering the bandpass filtered signal with a correlation filter having a transfer function based upon the transfer function of the bandpass filter; and detecting peaks of the correlation-filtered signal. - View Dependent Claims (34, 35, 36, 37, 38, 45)
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39. A correlation receiver for detecting a pulse input signal comprising:
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a bandpass filter, having a transfer function, for bandpass filtering the input signal; a correlation filter for correlation filtering the bandpass filtered signal, the correlation filter having a transfer function based upon the transfer function of the bandpass filter; and a detector for detecting peaks of the correlation-filtered signal. - View Dependent Claims (40, 41, 42, 43, 44, 46)
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Specification