An Efficient Adaptive Thresholding Scheme For Signal Decoding In Nlos Vlc Systems

• doi: 10.1109/MeditCom49071.2021.9647560
• title: An efficient adaptive thresholding scheme for signal decoding in NLOS VLC systems
• publisher: IEEE
• isbn: 978-1-6654-4506-1
• issn:
• rank: 1557
• access_type: LOCKED
• content_type: Conferences
• abstract: Visible Light Communication (VLC) has been evolved as a promising technique for indoor communications in the last years, exhibiting several merits compared to existing Radio Frequency (RF) communications. In the case of LED-to-Camera systems, the demodulation of the transmitted signal is achieved by exploiting the rolling shutter effect in the frames captured by CMOS sensors. The processing of each frame aims at the correct identification of the bright and dark stripes in the region of interest. Furthermore, the accurate determination of the width of each stripe has a significant influence in the performance of the system, when the Manchester encoding of the signal is used. However, the exact width is usually ambiguous, due to the severe fluctuation in the image intensity. In this work, we present an adaptive thresholding technique for the classification of the stripes in one-symbol or two-symbols categories, for the demodulation of the transmitted signal. The proposed technique was evaluated and compared with a constant threshold-based scheme in a non line-of-sight (NLOS) system, and the results indicate that our method is more efficient.
• article_number: 9647560
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9647560
• html_url: https://ieeexplore.ieee.org/document/9647560/
• abstract_url: https://ieeexplore.ieee.org/document/9647560/
• publication_title: 2021 IEEE International Mediterranean Conference on Communications and Networking (MeditCom)
• conference_location: Athens, Greece
• conference_dates: 7-10 Sept. 2021
• publication_number: 9647430
• is_number: 9647442
• publication_year: 2021
• publication_date: 7-10 Sept. 2021
• start_page: 378
• end_page: 382
• citing_paper_count: 3
• citing_patent_count: 0
• download_count: 213
• insert_date: 20211223
• index_terms:
  • ieee_terms:
    • Radio frequency
    • Indoor communication
    • Adaptive systems
    • Receivers
    • Encoding
    • Sensor systems
    • Decoding
  • author_terms:
    • Visible Light Communication (VLC)
    • Non-Line-of-Sight (NLOS)
    • Wireless Communication
    • Rolling Shutter
    • Manchester encoding
  • dynamic_index_terms:
    • Adaptive Threshold
    • Non-line-of-sight
    • NLOS
    • non-LOS
    • Secret Sharing
    • Threshold Strategy
    • Secret-sharing
    • System Performance
    • Intensity Fluctuations
    • Volume Fluctuations
    • Strip Width
    • Influence Of Performance
    • Visible Light Communication
    • Rolling Shutter
    • Illumination
    • Lighting
    • Decoding
    • Decryption
    • Light Signal
    • Traffic Signal
    • Grayscale Images
    • Greyscale Images
    • Binary Image
    • Android Application
    • Android System
    • Android Operating System
    • Android Mobile
    • Android Phone
    • Android Platform
    • Data Packets
    • Narrow Strip
    • On-off Keying
    • Static Threshold
    • Smartphone
• isbn_formats:
  • format: Print on Demand(PoD) ISBN, value: 978-1-6654-4506-1, isbnType: New-2005
  • format: Electronic ISBN, value: 978-1-6654-4505-4, isbnType: New-2005
• authors:
  • Author Name: Marina E. Plissiti
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37281513200
    ID: 37281513200
    Order: 1
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
  • Author Name: Christoforos Papaioannou
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37086591830
    ID: 37086591830
    Order: 2
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
  • Author Name: Yiorgos Sfikas
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37320311000
    ID: 37320311000
    Order: 3
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
  • Author Name: Georgios Papatheodorou
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37089206683
    ID: 37089206683
    Order: 4
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
  • Author Name: Simon-Ilias Poulis
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37089206889
    ID: 37089206889
    Order: 5
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
  • Author Name: Aristides Efthymiou
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37089208471
    ID: 37089208471
    Order: 6
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
  • Author Name: Yiorgos Tsiatouhas
    Affiliation: Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece
    Author URL: https://ieeexplore.ieee.org/author/37272806000
    ID: 37272806000
    Order: 7
    Author Affiliations:
    • Computer Science & Engineering Dept, University of Ioannina, Ioannina, Greece

Image Sensor

• sensor_type: CMOS
• resolution: 48 megapixels 1080p
• dynamic_range: Not specified
• pixel_size: 0.8 µm
• dark_current: Not specified

Optical Data

• focal_length: Not specified
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

• frame_rate: Up to 30 fps
• sensitivity: ISO 3200
• shutter_speed: 83 µs
• power_consumption: Not specified, but implies low due to smartphone application.

Applications & Benefits

• cell_imaging: Used in smartphones and potentially medical imaging, relevant for visible light communication applications.
• benefits: Enables digital imaging through visible light communication, allows NLOS communication which enhances flexibility in various applications.

Supporting Organizations

• supported_by: European Union and Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation.

Manuscript Details

• publication_date: 7-10 Sept. 2021

Relevancy Score

• score: 9
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • noise sources
  • analog-to-digital conversion techniques
  • microlenses
  • on-chip color filters
  • global or rolling shutters
  • backside illumination

Processed JSON Filename

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