Two-user MISO broadcast channel: Synergistic benefits of alternating CSIT

Ravi Tandon, Syed Ali Jafar, Shlomo Shamai, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The degrees of freedom (DoF) of the two-user multiple-input single-output (MISO) broadcast channel (BC) are studied under the assumption that the form, Ii, i = 1, 2, of the channel state information at the transmitter (CSIT) for each user's channel can be either perfect (P), delayed (D) or not available (N), i.e., I1, I2 {P, N, D}, and therefore the overall CSIT can alternate between the 9 resulting states I1I 2. The fraction of time associated with CSIT state I 1I2 is denoted by the parameter λI 1I2 and it is assumed throughout that λI 1I2 = λI2I1, i.e., λPN = λNP, λPD = λDP, λDN = λND. Under this assumption of symmetry, the main contribution of this paper is a complete characterization of the DoF region of the two user MISO BC with alternating CSIT. The results highlight the synergistic benefits of alternating CSIT and the tradeoffs between various forms of CSIT for any given DoF value.

Original languageEnglish (US)
Title of host publication2013 IEEE International Symposium on Information Theory, ISIT 2013
Pages1764-1768
Number of pages5
DOIs
StatePublished - Dec 19 2013
Event2013 IEEE International Symposium on Information Theory, ISIT 2013 - Istanbul, Turkey
Duration: Jul 7 2013Jul 12 2013

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8095

Other

Other2013 IEEE International Symposium on Information Theory, ISIT 2013
CountryTurkey
CityIstanbul
Period7/7/137/12/13

All Science Journal Classification (ASJC) codes

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

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    Tandon, R., Jafar, S. A., Shamai, S., & Poor, H. V. (2013). Two-user MISO broadcast channel: Synergistic benefits of alternating CSIT. In 2013 IEEE International Symposium on Information Theory, ISIT 2013 (pp. 1764-1768). [6620530] (IEEE International Symposium on Information Theory - Proceedings). https://doi.org/10.1109/ISIT.2013.6620530