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Improved Tracking Of Square-Wave SubcarrierVariance of phase error reduced. Report discusses application of "windowing" concept to improve ability of telemetry receiver to track phase of square-wave phase-modulation subcarrier signal. Concept based on setting phase-tracking signal at zero outside narrow time "windows", reducing noise energy in processed signal. Result is increase in signal-to-noise ratio in tracking loop with consequent increase in accuracy of tracking and reduction in number of errors in telemetric data.
Document ID
19880000168
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Hurd, William J.
(Caltech)
Aguirre, Sergio
(Caltech)
Date Acquired
August 13, 2013
Publication Date
March 1, 1988
Publication Information
Publication: NASA Tech Briefs
Volume: 12
Issue: 3
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
NPO-17135
Accession Number
88B10168
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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