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dc.contributor.authorCessna, J. R.
dc.date.accessioned2016-04-15T18:11:14Zen
dc.date.available2016-04-15T18:11:14Zen
dc.date.issued1972-10en
dc.identifier.issn0884-5123en
dc.identifier.issn0074-9079en
dc.identifier.urihttp://hdl.handle.net/10150/605524en
dc.descriptionInternational Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, Californiaen_US
dc.description.abstractA class of digital phase locked loops exists for which performance can be demonstrated to be comparable to that of the linear analog model, yet the use of coarse quantization seems to be favored. This class is characterized by the use of (1) a phase detector with quantized output, (2) a sequential loop filter, and (3) a discrete phase adjustment clock. The sequential filter is an inherently nonlinear device which operates on a sequence of inputs and provides a sequence of outputs, usually fewer in number and with a variable interval between outputs. Operation of these loops is decidedly nonlinear and a conventional linear loop bandwidth cannot be defined. Although higher than first order loops of this class may be constructed, their analysis, so far, has been limited to first order types by random walk techniques. A quasi-bandwidth measure can be defined for these loops in terms of their transient response which serves as an absolute basis for comparison of different digital loops. Using this tool, examples of 3- and 4-level quantization in these loops are found to have no obvious advantages over the binary quantized model and in some cases striking disadvantages.
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.language.isoen_USen
dc.publisherInternational Foundation for Telemeteringen
dc.relation.urlhttp://www.telemetry.org/en
dc.rightsCopyright © International Foundation for Telemeteringen
dc.titleDIGITAL PHASE LOCKED LOOPS WITH SEQUENTIAL LOOP FILTERS: A CASE FOR COARSE QUANTIZATIONen_US
dc.typetexten
dc.typeProceedingsen
dc.contributor.departmentNational Oceanic and Atmospheric Administrationen
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.description.collectioninformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.en
refterms.dateFOA2018-07-01T04:44:17Z
html.description.abstractA class of digital phase locked loops exists for which performance can be demonstrated to be comparable to that of the linear analog model, yet the use of coarse quantization seems to be favored. This class is characterized by the use of (1) a phase detector with quantized output, (2) a sequential loop filter, and (3) a discrete phase adjustment clock. The sequential filter is an inherently nonlinear device which operates on a sequence of inputs and provides a sequence of outputs, usually fewer in number and with a variable interval between outputs. Operation of these loops is decidedly nonlinear and a conventional linear loop bandwidth cannot be defined. Although higher than first order loops of this class may be constructed, their analysis, so far, has been limited to first order types by random walk techniques. A quasi-bandwidth measure can be defined for these loops in terms of their transient response which serves as an absolute basis for comparison of different digital loops. Using this tool, examples of 3- and 4-level quantization in these loops are found to have no obvious advantages over the binary quantized model and in some cases striking disadvantages.


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