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Selected Works of Chulsoon Hwang
Article
Noise Coupling Path Analysis for RF Interference Caused by LCD Noise Modulation
Proceedings of the IEEE International Symposium on Electromagnetic Compatibility (2016, Ottawa, Canada)
  • Chulsoon Hwang, Missouri University of Science and Technology
  • Sunkyu Kong
  • Takashi Enomoto
  • Junji Maeshima
  • Kenji Araki
  • David Pommerenke, Missouri University of Science and Technology
  • Jun Fan, Missouri University of Science and Technology
Link
Abstract

RF interference caused by liquid crystal display (LCD) noise modulation in a mobile phone was investigated and its noise coupling path was demonstrated. In the frequency division duplex communications, mobile phones can send (uplink) and receive (downlink) at the same time. When an antenna transmits high power signal, the baseband noise from an LCD panel is modulated into an RF band and causes interference in a receiving antenna. A noise coupling path between an antenna and a display driver IC, which drives the LCD panel, was experimentally demonstrate. In addition, a simple noise source model was proposed to represent modulation mechanism. A network analysis with the modulation model showed good correlation with the measured spectra of the modulated noise in a receiving antenna.

Meeting Name
2016 IEEE International Symposium on Electromagnetic Compatibility, EMC 2016 (2016: Jul. 25-29, Ottawa, Canada)
Department(s)
Electrical and Computer Engineering
Research Center/Lab(s)
Center for High Performance Computing Research
Second Research Center/Lab
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
  • Antennas,
  • Cellular telephones,
  • Electromagnetic compatibility,
  • Mobile phones,
  • Modulation,
  • Receiving antennas,
  • Regression analysis,
  • Telephone sets,
  • Display driver ic,
  • Frequency-division duplexes,
  • Good correlations,
  • Liquid crystal display(LCD),
  • Modulation models,
  • Noise coupling,
  • Noise source models,
  • RF interference,
  • Liquid crystal displays
International Standard Book Number (ISBN)
978-150901441-5
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2016 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Publication Date
9-1-2016
Publication Date
01 Sep 2016
Disciplines
Citation Information
Chulsoon Hwang, Sunkyu Kong, Takashi Enomoto, Junji Maeshima, et al.. "Noise Coupling Path Analysis for RF Interference Caused by LCD Noise Modulation" Proceedings of the IEEE International Symposium on Electromagnetic Compatibility (2016, Ottawa, Canada) (2016) p. 348 - 352 ISSN: 1077-4076
Available at: http://works.bepress.com/chulsoon-hwang/29/