Author
Narmanlıoglu, Ömer, Uysal, Murat
Publication Date
2016
Type
Document
Language
Turkish
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
978-1-5090-1679-2
Record ID
f55ca467-e2e4-4b2b-9d44-00fbd11a1db6
Library Location
Electrical & Electronics Engineering
Date
2016
Notes
Istanbul Development Agency
Sample Text
Visible light communication (VLC) is a short-range wireless transmission technique in which light emitting diodes (LEDs) are used as data transmitters. Because of non-coherent characteristics of LEDs, only intensity can be used in transmission, therefore, the signal driven to LEDs should be real valued and non-negative. The output of inverse discrete Fourier transform (IDFT) process in conventional orthogonal frequency division multiplexing (OFDM) is complex-valued. In VLC systems, to make the output of IDFT block real valued, Hermitian symmetry is applied at the input. This reduces spectral efficiency to half. In this paper, to prevent the decrease in spectral efficiency of VLC systems, discrete cosine transform (DCT)-based OFDM structure with real valued outputs is proposed. The error rate performance of the proposed system is compared with DFTbased OFDM system over indoor realistic VLC channel models.
DOI
10.1109/SIU.2016.7495792
