A Transceiver Design for Spectrum Sharing in Mixed Numerology Environments

Jaeyoung Choi, Beomju Kim, Kwonjong Lee, Daesik Hong

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We consider a mixed numerology spectrum sharing (SS) system where the users have different subcarrier spacing (SCS). Unlike in single numerology SS systems, mixed numerology SS systems suffer from inter-numerology interference (INI). We first derive the interference pattern and find that the variance of interference energy increases due to the difference in SCS. This increase in variance negatively affects decoding performance, since the interference energy is unbalanced between subcarriers. However, previous works on this issue did not take this interference pattern into account for interference management. In order to suppress the increase in variance of the interference energy, we propose a transceiver structure for large SCS users by using simple cyclic shift and frequency shift operations. The proposed transceiver disperses the effect of INI, reducing the variance in the interference energy. From the derived distribution characteristics of the interference energy in closed-form expressions, we show that the proposed transceiver achieves better decoding performance.

Original languageEnglish
Article number8678670
Pages (from-to)2707-2721
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume18
Issue number5
DOIs
Publication statusPublished - 2019 May

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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