We consider the two-user MISO broadcast channel where the transmitter has imperfect knowledge on the current channel state, in addition to delayed channel state information. The degree of freedom region is completely characterized. The optimal scheme smoothly bridges between the scheme recently proposed by Maddah-Ali and Tse with no current state information and a simple zero-forcing beamforming with perfect current state information. The essential ingredients of this scheme lie in the quantization and multicasting of the overheard interferences, while broadcasting new private messages.

Original languageEnglish
Title of host publication2012 IEEE Information Theory Workshop, ITW 2012
PublisherIEEE Computer Society
Number of pages5
ISBN (Print)9781467302234
StatePublished - 2012
Externally publishedYes
Event2012 IEEE Information Theory Workshop, ITW 2012 - Lausanne, Switzerland
Duration: 3 Sep 20127 Sep 2012

Publication series

Name2012 IEEE Information Theory Workshop, ITW 2012


Conference2012 IEEE Information Theory Workshop, ITW 2012


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