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- Trellis_modulation abstract "In telecommunication, trellis modulation (also known as trellis coded modulation, or simply TCM) is a modulation scheme that transmits information with high efficiency over band-limited channels such as telephone lines. Gottfried Ungerboeck invented trellis modulation while working for IBM in the 1970s, and first described it in a conference paper in 1976. It went largely unnoticed, however, until he published a new, detailed exposition in 1982 that achieved sudden and widespread recognition.In the late 1980s, modems operating over plain old telephone service (POTS) typically achieved 9.6 kbit/s by employing 4 bits per symbol QAM modulation at 2,400 baud (symbols/second). This bit rate ceiling existed despite the best efforts of many researchers, and some engineers predicted that without a major upgrade of the public phone infrastructure, the maximum achievable rate for a POTS modem might be 14 kbit/s for two-way communication (3,429 baud × 4 bits/symbol, using QAM).14 kbit/s is only 40% of the theoretical maximum bit rate predicted by Shannon's Theorem for POTS lines (approximately 35 kbit/s). Ungerboeck's theories demonstrated that there was considerable untapped potential in the system, and by applying the concept to new mode standards, speed rapidly increased to 14.4, 28.8 and ultimately 33.6 kbit/s.".
- Trellis_modulation thumbnail Convolutional_code_trellis_diagram.svg?width=300.
- Trellis_modulation wikiPageExternalLink tcm.pdf.
- Trellis_modulation wikiPageExternalLink Oral-History:Gottfried_Ungerboeck.
- Trellis_modulation wikiPageID "479030".
- Trellis_modulation wikiPageLength "5821".
- Trellis_modulation wikiPageOutDegree "18".
- Trellis_modulation wikiPageRevisionID "674407255".
- Trellis_modulation wikiPageWikiLink Category:Telecommunication_theory.
- Trellis_modulation wikiPageWikiLink Category:Telecommunications_engineering.
- Trellis_modulation wikiPageWikiLink Convolutional_code.
- Trellis_modulation wikiPageWikiLink Data_rate_units.
- Trellis_modulation wikiPageWikiLink Garden_trellis.
- Trellis_modulation wikiPageWikiLink Gottfried_Ungerboeck.
- Trellis_modulation wikiPageWikiLink Information_Age.
- Trellis_modulation wikiPageWikiLink International_Telecommunication_Union.
- Trellis_modulation wikiPageWikiLink s.
- Trellis_modulation wikiPageWikiLink Modem.
- Trellis_modulation wikiPageWikiLink Noisy-channel_coding_theorem.
- Trellis_modulation wikiPageWikiLink Plain_old_telephone_service.
- Trellis_modulation wikiPageWikiLink Quadrature_amplitude_modulation.
- Trellis_modulation wikiPageWikiLink Shannons_Theorem.
- Trellis_modulation wikiPageWikiLink Telecommunication.
- Trellis_modulation wikiPageWikiLink Telephone_line.
- Trellis_modulation wikiPageWikiLink Trellis_(architecture).
- Trellis_modulation wikiPageWikiLink File:Convolutional_code_trellis_diagram.svg.
- Trellis_modulation wikiPageWikiLinkText "TCM".
- Trellis_modulation wikiPageWikiLinkText "Trellis Coded Modulation".
- Trellis_modulation wikiPageWikiLinkText "Trellis modulation".
- Trellis_modulation wikiPageWikiLinkText "Trellis".
- Trellis_modulation wikiPageWikiLinkText "Trellis-coded modulation".
- Trellis_modulation wikiPageWikiLinkText "trellis code".
- Trellis_modulation wikiPageWikiLinkText "trellis coded modulation".
- Trellis_modulation wikiPageWikiLinkText "trellis encoder".
- Trellis_modulation wikiPageWikiLinkText "trellis modulated".
- Trellis_modulation wikiPageWikiLinkText "trellis modulation".
- Trellis_modulation hasPhotoCollection Trellis_modulation.
- Trellis_modulation wikiPageUsesTemplate Template:Citation_needed.
- Trellis_modulation wikiPageUsesTemplate Template:Modulation_techniques.
- Trellis_modulation wikiPageUsesTemplate Template:Or.
- Trellis_modulation wikiPageUsesTemplate Template:Too_technical.
- Trellis_modulation subject Category:Telecommunication_theory.
- Trellis_modulation subject Category:Telecommunications_engineering.
- Trellis_modulation hypernym Scheme.
- Trellis_modulation type Article.
- Trellis_modulation type Organisation.
- Trellis_modulation type Article.
- Trellis_modulation type Discipline.
- Trellis_modulation type Thing.
- Trellis_modulation comment "In telecommunication, trellis modulation (also known as trellis coded modulation, or simply TCM) is a modulation scheme that transmits information with high efficiency over band-limited channels such as telephone lines. Gottfried Ungerboeck invented trellis modulation while working for IBM in the 1970s, and first described it in a conference paper in 1976.".
- Trellis_modulation label "Trellis modulation".
- Trellis_modulation sameAs Трелис-кодирана_модулация.
- Trellis_modulation sameAs Trellis_coded_modulation.
- Trellis_modulation sameAs Mřížkově_kódovaná_modulace.
- Trellis_modulation sameAs Trellis-Code.
- Trellis_modulation sameAs Modulación_con_Codificación_Reticulada.
- Trellis_modulation sameAs Trellis_Coded_Modulation.
- Trellis_modulation sameAs 격자_부호_변조.
- Trellis_modulation sameAs Modulacja_kratowo-kodowa.
- Trellis_modulation sameAs m.02ffq6.
- Trellis_modulation sameAs Треллис-модуляция.
- Trellis_modulation sameAs Треліс-модуляція.
- Trellis_modulation sameAs Q557200.
- Trellis_modulation sameAs Q557200.
- Trellis_modulation wasDerivedFrom Trellis_modulation?oldid=674407255.
- Trellis_modulation depiction Convolutional_code_trellis_diagram.svg.
- Trellis_modulation isPrimaryTopicOf Trellis_modulation.
