Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1996-02-28
1998-04-07
Ghebretinsae, Temesghen
Pulse or digital communications
Receivers
Interference or noise reduction
455296, H04B 110
Patent
active
057373698
ABSTRACT:
An apparatus and method for recovering data in the presence of error transients is disclosed that includes a received waveform containing an information signal encoded at periodic time instants of a known period for eliminating an undesired amplitude error in the received waveform, where the error is slowly varying with respect to the known periods and recovering the desired periodic time instants. A delay element for delaying the received waveform by an amount equal to the period is included and a subtracting element for comparing the received waveform with the delayed waveform, and providing a timing recovery signal with zero crossing substantially less corrupted by the undesired amplitude error, and an averaging circuitry operating on the timing recovery signal for purposes of recovering the desired periodic time instants aids in recovering data in the presence of error transients.
REFERENCES:
patent: 5652541 (1997-07-01), Yang et al.
Ghebretinsae Temesghen
Maddox Donna Rogers
Motorola Inc.
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