New results on multiple-input multiple-output broadcast channels with confidential messages

Ruoheng Liu, Tie Liu, H. Vincent Poor, Shlomo Shamai Shitz

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


This paper presents two new results on multiple-input multiple-output (MIMO) Gaussian broadcast channels with confidential messages. First, the MIMO Gaussian wiretap channel is revisited. A matrix characterization of the capacity-equivocation region is provided, which extends the previous result on the secrecy capacity to the more general imperfect secrecy setting. Next, the MIMO Gaussian broadcast channel with two receivers and three independent messages: a common message intended for both receivers, and two confidential messages each intended for one of the receivers but needing to be kept asymptotically perfectly secret from the other, is considered. A precise characterization of the capacity region is provided, generalizing the previous results which considered only two out of three possible messages.

Original languageEnglish (US)
Article number6408170
Pages (from-to)1346-1359
Number of pages14
JournalIEEE Transactions on Information Theory
Issue number3
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences


  • Broadcast channel
  • capacity-equivocation region
  • confidential message
  • multiple-input multiple-output (MIMO) communication
  • wiretap channel


Dive into the research topics of 'New results on multiple-input multiple-output broadcast channels with confidential messages'. Together they form a unique fingerprint.

Cite this