MIMO Gaussian Broadcast Channels with Confidential Messages Conference Paper uri icon


  • This paper considers the problem of secret communication over a two-receiver multiple-input multiple-output (MIMO) Gaussian broadcast channel. The transmitter has two independent messages, each of which is intended for one of the receivers but needs to be kept asymptotically perfectly secret from the other. It is shown that, surprisingly, under a matrix power constraint both messages can be simultaneously transmitted at their respective maximal secrecy rates. To prove this result, the MIMO Gaussian wiretap channel is revisited and a new characterization of its secrecy capacity is provided via a new coding scheme that uses artificial noise (a prefix channel) and random binning. 2009 IEEE.

name of conference

  • 2009 IEEE International Symposium on Information Theory

published proceedings

  • 2009 IEEE International Symposium on Information Theory

author list (cited authors)

  • Liu, R., Liu, T., Poor, H. V., & Shamai, S.

citation count

  • 13

complete list of authors

  • Liu, Ruoheng||Liu, Tie||Poor, H Vincent||Shamai, Shlomo

publication date

  • January 2009