Data recovery device
AssigneeMotorola, Inc.
InventorsMark L. Oliboni, James G. Mittel, Richard A. Erhart
Life of this patent
Estimating the term…
Abstract
A data recovery device (208) for recovering data symbols having a period T from a received data stream. The data recovery device samples at least one data symbol in the received data stream at a rate determined by an integration envelope (301) having the period T. The samples are accumulated as a weighted sample count representing a recovered data symbol that is then stored as at least one recovered data bit.
Claims20
A data recovery device for recovering data symbols having a period T from a received data stream, the data recovery device comprising:
- means for generating a reference clock signal in response to a received channel data rate corresponding with the period T associated with a recovered data symbol;
- means for generating a synchronizing pulse coupled to the means for generating the reference clock signal, the synchronizing pulse functioning to delineate a data symbol sampling period relative to the reference clock signal and corresponding with the period T associated with the recovered data symbol;
- means for sampling at least one data symbol in the received data stream during the data symbol sampling period in response to the synchronizing pulse and accumulating a plurality of sample values as a weighed sample count at a rate determined by an integration envelope having the period T, the weighted sample count representing a recovered data symbol;
- and
- means for storing the recovered data symbol from the sampling means as at least one recovered data bit.
A selective call receiver having a data recovery device for recovering data symbols having a period T from a received data stream, the selective call receiver comprising:
- means for generating a reference clock signal in response to a received channel data rate corresponding with the period T associated with a recovered data symbol;
- means for generating a synchronizing pulse coupled to the means for generating the reference clock signal, the synchronizing pulse functioning to delineate a data symbol sampling period relative to the reference clock signal and corresponding with the period T associated with the recovered data symbol;
- means for sampling at least one data symbol in the received data stream during the data symbol sampling period in response to the synchronizing pulse and accumulating a plurality of sample values as a weighted sample count at a rate determined by an integration envelope having the period T, the weighted sample count representing a recovered data symbol;
- and
- means for storing the recovered data symbol from the sampling means as at least one recovered data bit.
In a selective call receiver, a method for recovering data symbols having a period T from a received data stream, the method comprising the steps of:
- generating a reference clock signal in response to a received channel data rate corresponding with the period T associated with a recovered data symbol;
- generating a synchronizing pulse that functions to delineate a data symbol sampling period relative to the reference clock signal and corresponding with the period T associated with the recovered data symbol;
- sampling at least one data symbol in the received data stream during the data symbol sampling period in response to the synchronizing pulse and accumulating a plurality of sample values as a weighted sample count at a rate determined by an integration envelope having the period T, the weighted sample count representing a recovered data symbol;
- and
- storing the recovered data symbol as at least one recovered data bit.
Dependencies are inferred from the claim text.