Line encoding for multiuser MIMO downlink

Hyungjoon Song, Sooyong Choi, Daesik Hong

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigate nonlinear precoding techniques for a multiuser multiple-inputmultiple-output (MU-MIMO) downlink. When assuming full knowledge of the channel state information (CSI) at the transmitter, a vector perturbation (VP), based on sphere encoding, is a promising precoding scheme that approaches sum capacity while using a simple receiver. However, its encoding complexity can exponentially increase with the number of transmit antennas. This paper proposes a new VP scheme based on line encoding (LE), which provides very low complexity as well as competent throughput performance. For this purpose, the proposed LE scheme finds the smallest set of candidate vectors, including the optimal perturbation vector with high probability.

Original languageEnglish
Article number5641623
Pages (from-to)734-739
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Volume60
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

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All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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