NON-ORTHOGONALMULTIPLEACCESSFOR VISIBLE LIGHTCOMMUNICATION

Abstract

In this thesis, we applied Non-Orthogonal Multiple Access (NOMA) scheme for Visible Light Communication (VLC) for jointly enhancing both sum rate and spectrum efficiency (SE). VLC is an emerging area of research. The channel model considered in this work is line of sight (LOS) communication in downlink indoor VLC environments. Wefirst studied the data transmission through the LED in a room by plotting the optical power distribution and SNR considering the thermal and shot noise. Later we apply NOMA to indoor VLC channels to obtain the channel capacity by fixing the power allocation factors and later improving it by using fair power allocation to achieve the better sum rate. In our simulation, we compared NOMA with orthogonal frequency division multiple access (OFDMA) and find out that NOMA has better performance over OFDMA in the same indoor environment.