Yazar "Durukan, Furkan" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    A novel CSK modulated OFDM system for visible light communication
    (Institute of Electrical and Electronics Engineers Inc., 2019) Durukan, Furkan; Guney, Birhan Mert; Özen, Ali
    In this paper, color shift keying (CSK) modulation, which is selected as one of the modulation methods in visible light communication systems, is integrated with orthogonal frequency division multiplexing (OFDM) to increase the spectrum yield. However, the conventional fast Fourier transform (FFT) based OFDM needs that the CSK symbols be Hermitian symmetric, resulting in wasted bandwidth. In this study, it is proposed a real Fourier field based CSK OFDM technique using discrete Cosine transform (DCT), which can transform the real-value signal into a real-value signal and eliminate the need for Hermitian symmetry. Thus, the use of spectra has been doubled due to the removal of Hermitian symmetry in classical FFT-based OFDM systems. In order to test the achievement of the recommended CSK-modulated DCT-based OFDM (DCT-OFDM) and compare with the classical FFT-based OFDM and discrete sine transform (DST) based OFDM systems computer simulation studies are carried out in additive white Gaussian noise (AWGN) channel environment and a single path channel in indoor environment, where the transmitter and the receiver see each other (Line of sight, LOS). From the computer simulation outcomes, it is observed that approximately 17 dB of SNR gain is obtained with the proposed method for the 1E-3 BER value. © 2019 IEEE.
  • [ X ]
    Öğe
    Performance analysis of color shift keying systems in AWGN and color noise environment
    (Institute of Electrical and Electronics Engineers Inc., 2019) Durukan, Furkan; Guney, Birhan Mert; Özen, Ali
    In this paper, bit error rate (BER) performances of the color shift keying (CSK) modulation which is selected as one of the modulation methods in visible light communication systems, are analyzed in AWGN and color noise environments. Red, blue, pink and violet noises are used as colored noise. In addition, the performance of visible light communication systems is investigated by using a single-path channel in indoor environments where the transmitter and the receiver see each other (Line of sight, LOS). Computer simulation studies are performed for 4-CSK, 8-CSK and 16-CSK modulation. It is seen that the best performances of computer simulation results are obtained in red noisy environments after AWGN. © 2019 IEEE.