Abstract
We propose and experimentally demonstrate a non-orthogonal multiple access (NOMA) visible light communication (VLC) system using non-Hermitian symmetry (NHS) inverse-fast-Fourier-transform (IFFT)/FFT size efficient (SE) orthogonal frequency division multiplexing (OFDM). Fix power allocation and successive interference cancellation (SIC) algorithms are realized. The power ratio between different users, transmission distance, network cell coverage are investigated. The proposed scheme is also compared with the HS based direct-current optical (DCO)-OFDM NOMA-VLC system.
Highlights
White-Light light emitting diode (LED) based visible light communication (VLC) has attracted much attention recently [1]–[4]
We propose and experimentally demonstrate a non-orthogonal multiple access (NOMA) visible light communication (VLC) system using non-Hermitian symmetry (NHS) inverse-fast-Fourier-transform (IFFT)/FFT size efficient (SE) orthogonal frequency division multiplexing (OFDM)
To investigate the cell coverage of NOMA VLC system, the cell-edge user UE2 is moved along the perpendicular direction with respect to UE1 with distance d = 0, 5, 7.5, 10 and 15 cm
Summary
White-Light light emitting diode (LED) based visible light communication (VLC) has attracted much attention recently [1]–[4]. Non-Hermitian symmetry (NHS)-OFDM were proposed, such as the fast Hartley transform (FHT) [7]; separated transmission of real (Re) and imaginary (Im) parts of the OFDM using red/green/blue (RGB) LEDs [8] or separated transmission by MIMO white LEDs [9]. An IFFT/FFT size efficient (SE) approach is proposed to transmit the Re and Im parts of OFDM in time domain sequentially [10], and experimentally demonstrated in [11]. We propose and experimentally demonstrate a NOMA-VLC system using NHS IFFT/FFT SE OFDM format This NHS-OFDM NOMA-VLC system is based on FPA and SIC to serve two users. The proposed scheme is compared with the HS based DCO-OFDM NOMA-VLC system
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