Cost-effective bidirectional digitized radio-over-fiber systems employing sigma delta modulation

Kyung Woon Lee, Hyundo Jung, Jung ho Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We propose a cost effective digitized radio-over-fiber (D-RoF) system employing a sigma delta modulation (SDM) and a bidirectional transmission technique using phase modulated downlink and intensity modulated uplink. SDM is transparent to different radio access technologies and modulation formats, and more suitable for a downlink of wireless system because a digital to analog converter (DAC) can be avoided at the base station (BS). Also, Central station and BS share the same light source by using a phase modulation for the downlink and an intensity modulation for the uplink transmission. Avoiding DACs and light sources have advantages in terms of cost reduction, power consumption, and compatibility with conventional wireless network structure. We have designed a cost effective bidirectional D-RoF system using a low pass SDM and measured the downlink and uplink transmission performance in terms of error vector magnitude, signal spectra, and constellations, which are based on the 10MHz LTE 64-QAM standard.

Original languageEnglish
Title of host publicationInfrared, Millimeter-Wave, and Terahertz Technologies IV
ISBN (Electronic)9781510604797
Publication statusPublished - 2016
EventInfrared, Millimeter-Wave, and Terahertz Technologies IV - Beijing, China
Duration: 2016 Oct 122016 Oct 14


OtherInfrared, Millimeter-Wave, and Terahertz Technologies IV


  • Digitized radio over fiber
  • Phase modulation
  • Re-modulation
  • Sigma delta modulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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