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On Gaussian MACs With Variable-Length Feedback and Non-Vanishing Error Probabilities

On Gaussian MACs With Variable-Length Feedback and Non-Vanishing Error Probabilities

We characterize the fundamental limits of transmission of information over a Gaussian multiple access channel (MAC) with the use of variable-length feedback codes and under a non-vanishing error probability formalism. We develop new achievability and converse techniques to handle the continuous nature of the channel and the presence of expected …