Browsing by Author "LIULE NEGASH BEYENE"

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    PERFORMANCE EVALUATION OF OFDM-NOMA IN MULTI USER VISIBLE LIGHT COMMUNICATION
    (Hawassa University, 2020-12-26) LIULE NEGASH BEYENE
    Visible light communication (VLC) is a progressing green communication expertise for indoor wireless communication networks. Visible light communication (VLC) uses light emitting diodes (LEDs) for together lighting and communication. On non-orthogonal multiple access (NOMA) increases the system throughput by improving spectral efficiency. In indoor VLC networks, the gain ratio power allocation(GRPA) of NOMA assigns superior signal power to consumers of poor channels to succeed both fairness and high data rate. However, current GRPA approaches settled for radio frequency channels are not essentially active in all VLC channel and illumination circumstances. In this thesis, we start the resource allocation (RA) problematic on behalf of the downlink orthogonal frequency division multiplexing centered non-orthogonal multiple access (OFDM-NOMA) scheme to decrease the interfering amongst multi-users by applying cluster formation in the parameter of BER, sum rate maximization. After this thesis has done, the outcomes have to make low BER and high sum rate