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

Enrico Piovano, Bruno Clerckx

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We consider the K -user multiple-input-single-output broadcast channel, where the transmitter, equipped with M antennas, serves K users, with K \leq M. The transmitter has access to a partial channel state information of the users. This is modeled by letting the variance of the channel state information at the transmitter error of user i scale as O(P^{-\alpha {i}} ) for the signal-to-noise ratio P and some constant \alpha {i} \geq 0. In this letter, we derive the optimal degrees-of-freedom region in such setting, and we show that rate-splitting is the key scheme to achieve such a region.

Original languageEnglish
Article number7972900
Pages (from-to)2368-2371
Number of pages4
JournalIEEE Communications Letters
Volume21
Issue number11
DOIs
Publication statusPublished - 2017 Nov

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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