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Common-message broadcast channels with feedback in the nonasymptotic regime: Full feedback

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Titel:	Common-message broadcast channels with feedback in the nonasymptotic regime: Full feedback
Autoren:	Trillingsgaard, Kasper Fløe, Yang, Wei, Durisi, Giuseppe, 1977, Popovski, Petar
Quelle:	SWIFT : short-packet wireless information theory IEEE Transactions on Information Theory. 64(12):7719-7741
Schlagwörter:	full feedback, variable-length coding, finite blocklength regime, Broadcast channel with common-message, channel dispersion
Beschreibung:	We investigate the maximum coding rate achievable on a two-user broadcast channel for the case where a common message is transmitted with feedback using either fixed-blocklength codes or variable-length codes. For the fixed-blocklength-code setup, we establish nonasymptotic converse and achievability bounds. An asymptotic analysis of these bounds reveals that feedback improves the second-order term compared to the no-feedback case. In particular, for a certain class of antisymmetric broadcast channels, we show that the dispersion is halved. For the variable-length-code setup, we demonstrate that the channel dispersion is zero.
Zugangs-URL:	https://research.chalmers.se/publication/506885
Datenbank:	SwePub

Beschreibung
Abstract:	We investigate the maximum coding rate achievable on a two-user broadcast channel for the case where a common message is transmitted with feedback using either fixed-blocklength codes or variable-length codes. For the fixed-blocklength-code setup, we establish nonasymptotic converse and achievability bounds. An asymptotic analysis of these bounds reveals that feedback improves the second-order term compared to the no-feedback case. In particular, for a certain class of antisymmetric broadcast channels, we show that the dispersion is halved. For the variable-length-code setup, we demonstrate that the channel dispersion is zero.
ISSN:	00189448 15579654
DOI:	10.1109/TIT.2018.2868934