Multiple-Input Multiple-Output Gaussian Broadcast Channels With Confidential Messages Academic Article uri icon

abstract

  • 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 (an additive prefix channel) and random binning. 2010 IEEE.

published proceedings

  • IEEE Transactions on Information Theory

author list (cited authors)

  • Ruoheng Liu, .., Tie Liu, .., Poor, H. V., & Shamai, S.

citation count

  • 156

complete list of authors

  • Poor, HV||Shamai, Shlomo

publication date

  • September 2010