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BER Analysis of RIS Assisted Multicast Communications with Network Coding

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Document pages: 5 pages

Abstract: In this paper, Recofigurable Intelligent Surface (RIS) assisted dual-hopmulticast wireless communication network is proposed with two source nodes andtwo destination nodes. RIS boosts received signal strength through anintelligent software-controlled array of discrete phase-shifting metamaterials.The multicast communication from the source nodes is enabled using a Decode andForward (DF) relay node. In the relay node, the Physical Layer Network Coding(PLNC) concept is applied and the PLNC symbol is transmitted to the destinationnodes. The joint RIS-Multicast channels between source nodes and the relay nodeare modeled as the sum of two scaled non-central Chi-Square distributions.Analytical expressions are derived for Bit Error Rate (BER) at relay node anddestination nodes using Moment Generating Function (MGF) approach and theresults are validated using Monte-Carlo simulations. It is observed that theBER performance of the proposed RIS assisted network is a lot better than theconventional non-RIS channels links.

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