The Source-Channel Separation Theorem Revisited

Sridhar Vembu, Sergio Verdú, Yossef Steinberg

Research output: Contribution to journalArticlepeer-review

168 Scopus citations


The single-user separation theorem of joint source-channel coding has been proved previously for wide classes of sources and channels. We find an information-stable source/channel pair which does not satisfy the separation theorem. New necessary and sufficient conditions for the transmissibility of a source through a channel are found, and we characterize the class of channels for which the separation theorem holds regardless of the source statistics.

Original languageEnglish (US)
Pages (from-to)44-54
Number of pages11
JournalIEEE Transactions on Information Theory
Issue number1
StatePublished - Jan 1995

All Science Journal Classification (ASJC) codes

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


  • Shannon Theory
  • channel capacity, source coding
  • joint source-channel coding
  • separation theorem


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