Persistent Link:
http://hdl.handle.net/10150/611461
Title:
AN EXTENDED PHASE-LOCK TECHNIQUE FOR AIDED ACQUISITION
Author:
Barbour, Susan
Affiliation:
Figgie International Inc.
Issue Date:
1984-10
Rights:
Copyright © International Foundation for Telemetering
Collection Information:
Proceedings 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.
Publisher:
International Foundation for Telemetering
Journal:
International Telemetering Conference Proceedings
Abstract:
In a phase-locked PM demodulator, the input signal is modulated by a periodic waveform, particularly when the loop bandwidth is less than the sideband to carrier spacing, and thus discrete sidebands are apt to appear about the carrier frequency. This frequently results in a sideband locking instead of phase-locking to a selected carrier and aided-acquisition is then required. Conventional techniques such as discriminator-aided-acquisition have been implemented by Mostrom¹ and Victor et al.² to correct this problem, however, this approach necessitates a large carrier to noise ratio (CNR) in the bandwidth of the discriminator. The current study describes a novel approach to extend the threshold for a phase-locked loop designed for Hartman Systems’ telemetry receiver. By phase remodulating the error signal, the network reduces the phase swing of the signal and restores the carrier power so as to provide anti-sideband properties for biphase and PM modulation up to 1.3 radians deviation at all modulation frequencies and at a signal level where CNR is greater than 5 dB above PM threshold.
Sponsors:
International Foundation for Telemetering
ISSN:
0884-5123; 0074-9079
Additional Links:
http://www.telemetry.org/

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleAN EXTENDED PHASE-LOCK TECHNIQUE FOR AIDED ACQUISITIONen_US
dc.contributor.authorBarbour, Susanen
dc.contributor.departmentFiggie International Inc.en
dc.date.issued1984-10-
dc.rightsCopyright © International Foundation for Telemeteringen
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
dc.publisherInternational Foundation for Telemeteringen
dc.description.abstractIn a phase-locked PM demodulator, the input signal is modulated by a periodic waveform, particularly when the loop bandwidth is less than the sideband to carrier spacing, and thus discrete sidebands are apt to appear about the carrier frequency. This frequently results in a sideband locking instead of phase-locking to a selected carrier and aided-acquisition is then required. Conventional techniques such as discriminator-aided-acquisition have been implemented by Mostrom¹ and Victor et al.² to correct this problem, however, this approach necessitates a large carrier to noise ratio (CNR) in the bandwidth of the discriminator. The current study describes a novel approach to extend the threshold for a phase-locked loop designed for Hartman Systems’ telemetry receiver. By phase remodulating the error signal, the network reduces the phase swing of the signal and restores the carrier power so as to provide anti-sideband properties for biphase and PM modulation up to 1.3 radians deviation at all modulation frequencies and at a signal level where CNR is greater than 5 dB above PM threshold.en
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.identifier.issn0884-5123-
dc.identifier.issn0074-9079-
dc.identifier.urihttp://hdl.handle.net/10150/611461-
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.typetexten
dc.typeProceedingsen
dc.relation.urlhttp://www.telemetry.org/en
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