A minimum distance criterion based constellation design for uplink NOMA

Hsuan Po Liu, Shin Lin Shieh, Chia Hung Lin, Po Ning Chen

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

Abstract

Motivated by the future scenarios of ultra- reliability and low latency communications (URLLC) and integrated access and backhaul (IAB) that are currently discussed in 3GPP, we propose a novel parallelogram-structured constellation design based on minimum distance (MD) criterion for powerdomain uplink NOMA system. In comparison with previous work, which maximizes MD of the superimposition of the usual constellations, such as QPSK and 16 QAM, by inter-constellation rotation, the incorporation of parallelogram- structure into the NOMA constellation design can achieve a much better MD. Since the proposed constellations can be parameterized as a function of the power ratio î±, the signaling overhead for a base station to designate the constellations to be used by each user equipment is minimized. Simulation results show that our proposed constellation design can further improve the symbol error rate, as well as the achievable rate, of the inter-constellation-rotated superposition of usual square constellations.

Original languageEnglish
Title of host publication2019 IEEE 90th Vehicular Technology Conference, VTC 2019 Fall - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728112206
DOIs
StatePublished - Sep 2019
Event90th IEEE Vehicular Technology Conference, VTC 2019 Fall - Honolulu, United States
Duration: 22 Sep 201925 Sep 2019

Publication series

NameIEEE Vehicular Technology Conference
Volume2019-September
ISSN (Print)1550-2252

Conference

Conference90th IEEE Vehicular Technology Conference, VTC 2019 Fall
CountryUnited States
CityHonolulu
Period22/09/1925/09/19

Keywords

  • Constellation design
  • Minimum distance criterion
  • NOMA

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