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One way Doppler Extractor. Volume 2 : Digital VCO technique

Author
Starner, E. R.
Published
Dec 1, 1974.
Physical Description
1 electronic document
Additional Creators
Nossen, E. J.
Online Version

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Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
A feasibility analysis and trade-offs for a one-way Doppler extractor using digital VCO techniques is presented. The method of Doppler measurement involves the use of a digital phase lock loop; once this loop is locked to the incoming signal, the precise frequency and hence the Doppler component can be determined directly from the contents of the digital control register. The only serious error source is due to internally generated noise. Techniques are presented for minimizing this error source and achieving an accuracy of 0.01 Hz in a one second averaging period. A number of digitally controlled oscillators were analyzed from a performance and complexity point of view. The most promising technique uses an arithmetic synthesizer as a digital waveform generator.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19750024245.
Accession ID: 75N32318.
REPT-13517-F-2-VOL-2.
NASA-CR-141574.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15738626