Sparse Code Multiple Access for Visible Light Communication and 5G and IoT Application

Abstract

There is a growing need to conserve the frequency spectrum. There will be a shortage of radio spectrum with the upcoming 5G and Internet of Things technology; these will require massive connectivity. It requires a shift from the usual orthogonal multiple access technique and also from Wi-Fi-based systems. Li-Fi is a form of visible light communication (VLC) and an alternative to Wi-Fi; the visible spectrum is 10,000 times larger than the radio spectrum. Non-Orthogonal Multiple Access (NOMA) techniques are being explored currently which offer better spectrum conservation than orthogonal multiple access techniques. Sparse Code Multiple Access (SCMA) is a viable multiple access technique for VLC and 5G systems. It offers better spectral efficiency and energy efficiency than Power Domain-Non Orthogonal Multiple Access (PD-NOMA). This paper focuses on the performance of SCMA in Rician fading channel which is predominant in indoor communication.