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Trellis coded modulation

Trellis coded modulation (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…

A new modulation method & Overview

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A new modulation method

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Trellis coded modulation

Nodes16
Edges15
Triples1
Avg. degree1.88
Density0.125
Components1

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modulation symbol ungerboeck symbols trellis bits baud kbit modems modem new 400 bit achieved qam two procedure codes tcm described

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SubjectPredicateObjectConfidenceSrc
telephone linesinstance ofis a modulation scheme that transmits information with high efficiency over band-limited channels0.80text

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