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Error and erasure exponents for the asymmetric broadcast channel are analyzed. The focus of the error analysis is on the main receiver where, nominally, both messages are to be decoded. A two-step decoding algorithm is proposed and analyzed. This receiver first attempts to decode both messages, failing which, it attempts to decode only the message representing the coarser information, i.e., the cloud...
We prove that N-user Gaussian multiple access channels (MACs) admit the strong converse. This means that every sequence of codes with asymptotic average error probabilities smaller than one has rate tuples that lie in the pentagonal region prescribed by Cover and Wyner.
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