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Error Exponent Regions for Gaussian Broadcast and Multiple Access Channels

Summary: 1
Error Exponent Regions for Gaussian Broadcast and
Multiple Access Channels
Lihua Weng, S. Sandeep Pradhan, and Achilleas Anastasopoulos
Abstract--In modern communication systems, different users
have different requirements for quality of service (QoS). In this
work, QoS refers to the average codeword error probability
experienced by the users in the network. Although several prac-
tical schemes (collectively referred to as unequal error protection
schemes) have been studied in the literature and are implemented
in existing systems, the corresponding performance limits have
not been studied in an information-theoretic framework.
In this paper an information-theoretic framework is considered
to study communication systems which provide heterogeneous
reliabilities for the users. This is done by defining individual
probabilities of error for the users in the network and obtaining
the fundamental tradeoffs of the corresponding error exponents.
In particular, we quantify the reliability tradeoff by introducing
the notion of error exponent region (EER), which specifies the set
of error exponent vectors that are simultaneously achievable by


Source: Anastasopoulos, Achilleas - Department of Electrical Engineering and Computer Science, University of Michigan


Collections: Engineering; Computer Technologies and Information Sciences