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Lecture notes in electrical engineering

Broadcast Channels with Confidential Messages: Channel Uncertainty, Robustness, and Continuity

Rafael F. Schaefer, Andrea Grigorescu, Holger Boche, H. Vincent Poor

Published Sep 24, 2015• 0 citations
Publisher
DOI
10.1007/978-3-319-23609-4_5

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The compound broadcast channel with confidential messages (BCC) generalizes the BCC by modeling the uncertainty of the channel. For the compound BCC, it is known only that the actual channel realization belongs to a pre-specified uncertainty set of channels and that it is constant during the entire transmission. For reliable and secure communication it is necessary to operate at a rate pair within the compound BCC capacity region. Therefore, the question of whether small variations of the uncertainty set lead to large losses of the compound BCC capacity region is of interest, and this problem is studied here. In particular, it is shown that the compound BCC model is robust, i.e., the capacity region depends continuously on the uncertainty set.