Date Added: Apr 2010
The authors 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. They obtain the entire capacity region of this channel. They also explore the connections between the capacity region they 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.