Subset-codebook precoding for 1-bit massive multiuser MIMO

Olav Tirkkonen, Christoph Studer

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

8 Citations (Scopus)

Abstract

We consider a massive multiuser MIMO downlink scenario with 1-bit digital-to-analog converters. QPSK information symbols are transmitted to the users by a channel-dependent mapping of the symbols to 1-bit DAC signals that are transmitted from each base station (BS) antenna. The mapping is selected to emulate the desired information bearing QPSK symbols at the users. Non-linear precoding is considered, where the mapping from the information symbols to the transmit antenna signals is selected based on the combination of information symbols. First, a linear quantized precoder is used to create tentative transmit symbols. For each combination of information symbols, a subset of antennas is selected, and an exhaustive search over a limited size codebook of precoding alternatives is performed. The resulting method significantly lowers the error floor caused by quantization, with a complexity that is linear in the number of transmit antennas.

Original languageEnglish
Title of host publication2017 51st Annual Conference on Information Sciences and Systems, CISS 2017
PublisherIEEE
Number of pages5
ISBN (Electronic)9781509047802
DOIs
Publication statusPublished - 10 May 2017
MoE publication typeA4 Article in a conference publication
EventConference on Information Sciences and Systems - Baltimore, United States
Duration: 22 Mar 201724 Mar 2017
Conference number: 51

Conference

ConferenceConference on Information Sciences and Systems
Abbreviated titleCISS
Country/TerritoryUnited States
CityBaltimore
Period22/03/201724/03/2017

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