Broadcasting over fading wiretap channels

Yingbin Liang, Lifeng Lai, H. Vincent Poor, Shlomo Shamai

Research output: Chapter in Book/Entry/PoemConference contribution

2 Scopus citations


Broadcasting over the fading wiretap channel is investigated for the situation without the channel state information (CSI) at the transmitter and subject to a delay constraint. A new broadcast approach is developed, which integrates secure superposition coding studied in the authors' previous work and embedded coding in a hybrid fashion. This scheme outperforms the previous approaches for the cases when the eavesdropper's channel is fading. The secrecy rate achievable via the new broadcast approach is derived, and the structure of the optimal power allocation function across the secure coding layers is characterized via techniques for solving the problem of constrained calculus of variations. A notion of probabilistic secrecy is introduced and studied, which characterizes the probability that a certain secrecy rate is achieved for any given fading block. Numerical examples are provided to demonstrate the impact of CSI at the transmitter if not available and the channel fluctuation of the eavesdropper on the average secrecy rate.

Original languageEnglish (US)
Title of host publication2012 IEEE International Symposium on Information Theory Proceedings, ISIT 2012
Number of pages5
StatePublished - 2012
Event2012 IEEE International Symposium on Information Theory, ISIT 2012 - Cambridge, MA, United States
Duration: Jul 1 2012Jul 6 2012

Publication series

NameIEEE International Symposium on Information Theory - Proceedings


Other2012 IEEE International Symposium on Information Theory, ISIT 2012
Country/TerritoryUnited States
CityCambridge, MA

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics


Dive into the research topics of 'Broadcasting over fading wiretap channels'. Together they form a unique fingerprint.

Cite this