Common-message broadcast channels with feedback in the nonasymptotic regime: Full feedback
Artikel i vetenskaplig tidskrift, 2018

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.

finite blocklength regime

variable-length coding

Broadcast channel with common-message

channel dispersion

full feedback


Kasper Fløe Trillingsgaard

Aalborg Universitet

Wei Yang

Qualcomm Technologies

Giuseppe Durisi

Chalmers, Elektroteknik, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Petar Popovski

Aalborg Universitet

IEEE Transactions on Information Theory

0018-9448 (ISSN)

Vol. 64 12 7719-7741 8456630







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