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dc.contributor.authorGilhousen, K. S.
dc.contributor.authorLumb, D. R.
dc.date.accessioned2016-04-14T15:18:29Zen
dc.date.available2016-04-14T15:18:29Zen
dc.date.issued1972-10en
dc.identifier.issn0884-5123en
dc.identifier.issn0074-9079en
dc.identifier.urihttp://hdl.handle.net/10150/605293en
dc.descriptionInternational Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, Californiaen_US
dc.description.abstractThere are numerous applications for high data rate coding systems for earth orbiting space-missions with power limited links. Studies indicated that a 40 Mbps hard decision sequential decoder would best meet the requirements. A prototype decoder has been designed and fabricated using the fastest commercially available digital integrated circuits, MECL III. Thus far, an internal computational rate of 70 Million computations per second has been achieved. Computational efficiency of the decoding algorithm was greatly improved by incorporating two modifications to the Fano algorithm; “double quick threshold loosening” and “diagonal steps.” Preliminary results indicate that an output error rate of 10^-5 can be achieved with E(b)/N(o) less than 5.4 dB at data rates up to 40 Mbps. At lower data rates, even less signal energy is required. This decoder is believed to be at least 5 times faster than any previous sequential decoder.
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.titleA VERY HIGH SPEED HARD DECISION SEQUENTIAL DECODERen_US
dc.typetexten
dc.typeProceedingsen
dc.contributor.departmentLINKABIT Corporationen
dc.contributor.departmentNASAen
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.dateFOA2018-07-02T02:13:03Z
html.description.abstractThere are numerous applications for high data rate coding systems for earth orbiting space-missions with power limited links. Studies indicated that a 40 Mbps hard decision sequential decoder would best meet the requirements. A prototype decoder has been designed and fabricated using the fastest commercially available digital integrated circuits, MECL III. Thus far, an internal computational rate of 70 Million computations per second has been achieved. Computational efficiency of the decoding algorithm was greatly improved by incorporating two modifications to the Fano algorithm; “double quick threshold loosening” and “diagonal steps.” Preliminary results indicate that an output error rate of 10^-5 can be achieved with E(b)/N(o) less than 5.4 dB at data rates up to 40 Mbps. At lower data rates, even less signal energy is required. This decoder is believed to be at least 5 times faster than any previous sequential decoder.


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