Gaussian MIMO Broadcast Channels with Common and Confidential Messages

Details Gaussian MIMO Broadcast Channels with Common and Confidential Messages Gaussian MIMO Broadcast Channels with Common and Confidential Messages

2010-01-19

arxiv.org/abs/1001.3297v1

Computer Science

Information Theory

Submitted to IEEE ISIT, 2010

Scientific paper

We study the two-user Gaussian multiple-input multiple-output (MIMO) broadcast channel with common and confidential messages. In this channel, the transmitter sends a common message to both users, and a confidential message to each user which is kept perfectly secret from the other user. We obtain the entire capacity region of this channel. We also explore the connections between the capacity region we obtained for the Gaussian MIMO broadcast channel with common and confidential messages and the capacity region of its non-confidential counterpart, i.e., the Gaussian MIMO broadcast channel with common and private messages, which is not known completely.

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