University of Hertfordshire

Degrees of freedom region of MIMO interference channel with imperfect current and delayed CSIT

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

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Original languageEnglish
Title of host publicationIEEE Wireless Communications and Networking Conference, WCNC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages863-868
Number of pages6
ISBN (Electronic)9781479930838
DOIs
Publication statusPublished - 10 Nov 2014
Event2014 IEEE Wireless Communications and Networking Conference, WCNC 2014 - Istanbul, Turkey
Duration: 6 Apr 20149 Apr 2014

Conference

Conference2014 IEEE Wireless Communications and Networking Conference, WCNC 2014
CountryTurkey
CityIstanbul
Period6/04/149/04/14

Abstract

In this paper, we study the degrees of freedom (DoF) of the two-user time-correlated multiple-input-multiple-output (MIMO) interference channel (IC), under realistic assumptions. In particular, the transmitters have imperfect knowledge of the current and the delayed channel state information (CSI). The novelty of this study relies upon the fact that this is the first time, within the literature of IC, that imperfect CSI is addressed for such a case. The delayed CSI at the transmitter (CSIT) is assumed to be more accurate than the current value. We identify the DoF region, which provides an insight on the behaviour of the DoF as a function of the varying qualities of the current and the delayed channel. It is also worth mentioning that any knowledge of imperfect delayed CSIT can also be utilized. Furthermore, an achievability scheme is proposed for each vertex in DoF region. Finally, simulation of the proposed scheme verifies our results.

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