Performance Analysis and Phase Shift Design of IRS-Aided Uplink OTFS-SCMA
Jiarui Li,
Yi Hong
Abstract:In this paper, we consider an intelligent reflecting surface (IRS)-aided orthogonal time frequency space (OTFS)-based uplink sparse code multiple access (SCMA) communications system. We first conduct performance analysis in terms of pairwise error probability (PEP) and derive an upper bound on word error probability (WEP). According to this bound, we establish a system design criterion and propose two IRS phase shifts design algorithms using semidefinite relaxation (SDR) and gradient ascent (GA) methods. The c… Show more
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