SIR Analysis of OFDM and GFDM Waveforms With Timing Offset, CFO, and Phase Noise

Byungju Lim, Young Chai Ko

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

In this paper, we analyze the impacts of timing offset (TO), carrier frequency offset (CFO), and phase noise in orthogonal frequency division multiplexing (OFDM) and generalized frequency division multiplexing (GFDM) waveforms. As TO can be classified into four cases depending on the direction of offset, we provide the analysis of signal-to-interference ratio (SIR) for each of the cases when phase noise and synchronization errors of the desired user occur in frequency selective channel. We also propose the receiver filter for GFDM systems that is optimized to maximize SIR with CFO in additive white Gaussian noise channel. Simulation results show that GFDM is more sensitive to CFO than OFDM. We also confirm that GFDM systems using proposed receiver filter are robust against CFO compared with conventional systems.

Original languageEnglish
Article number8014504
Pages (from-to)6979-6990
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume16
Issue number10
DOIs
Publication statusPublished - 2017 Oct

Keywords

  • GFDM
  • OFDM
  • SIR
  • Synchronization
  • carrier frequency offset
  • filter design
  • phase noise
  • timing offset

ASJC Scopus subject areas

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

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