Optimal DoF region of the K-User MISO BC with Partial CSIT

Enrico Piovano, Bruno Clercks

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We consider the K-User Multiple-Input-Single- Output (MISO) Broadcast Channel (BC) where the transmitter, equipped with M antennas, serves K users, with K ≤ M. The transmitter has access to a partial channel state information of the users. This is modelled by letting the variance of the Channel State Information at the Transmitter (CSIT) error of user i scale as O(P−αi) for the Signal-to-Noise Ratio (SNR) P and some constant αi ≥ 0. In this work we derive the optimal Degrees-of- Freedom (DoF) region in such setting and we show that Rate- Splitting (RS) is the key scheme to achieve such a region.

Original languageEnglish
JournalIEEE Communications Letters
DOIs
Publication statusAccepted/In press - 2017 Jul 8
Externally publishedYes

Keywords

  • DoF region
  • MISO BC
  • Partial CSIT

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

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