Capacity of Mismatched Gaussian Channels With and Without Feedback.
NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF STATISTICS
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Continuous time communication channels with additive noise are considered under an average power constraint. The noises are assumed to be Gaussian processes equivalent or mutually absolutely continuous to a Brownian motion. We study the problem whether the capacity of the channel is increased by feedback or not. It is given a sufficient condition under which the capacity is not increased by feedback. It is also given an example of a channel whose capacity is doubled by feedback.