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

Byungju Lim, Young-Chai Ko

Research output: Contribution to journalArticle

23 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 AWGN 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 to conventional systems.

Original languageEnglish
JournalIEEE Transactions on Wireless Communications
DOIs
Publication statusAccepted/In press - 2017 Aug 22

Fingerprint

Carrier Frequency Offset
Frequency division multiplexing
Phase Noise
Phase noise
Multiplexing
Orthogonal Frequency Division multiplexing (OFDM)
Waveform
Orthogonal frequency division multiplexing
Timing
Division
Interference
Receiver
Filter
Phase Synchronization
Synchronization
Maximise
Simulation

Keywords

  • carrier frequency offset
  • filter design
  • Frequency division multiplexing
  • GFDM
  • OFDM
  • OFDM
  • Phase noise
  • phase noise
  • Robustness
  • SIR
  • Synchronization
  • synchronization
  • timing offset
  • Wireless communication

ASJC Scopus subject areas

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

Cite this

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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 AWGN 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 to conventional systems.",
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