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About: TC-PAM     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatQuantizedRadioModulationModes, within Data Space : dbpedia.org associated with source document(s)

Type: softwareyago:Abstraction100002137yago:Attribute100024264yago:Manner104928903yago:Property104916342yago:WikicatQuantizedRadioModulationModes New Facet based on Instances of this Class

Trellis-coded pulse-amplitude modulation (TC-PAM) is the modulation format that is used in HDSL2 and G.SHDSL. It is a variant of trellis coded modulation (TCM) which uses a one-dimensional pulse-amplitude modulation (PAM) symbol space, as opposed to a two-dimensional quadrature amplitude modulation (QAM) symbol space. Compared to the 2B1Q scheme used in the older HDSL and SDSL standards, TC-PAM improves range at a given bit-rate and provides enhanced spectral compatibility with ADSL. TC-PAM is also known as 4B1H, because it uses 16 levels to represents a 4 digit binary, 4 Binary 1 Hexadecimal.