Computer Science > Information Theory
[Submitted on 19 Sep 2022 (v1), last revised 21 Sep 2022 (this version, v2)]
Title:Capacity Analysis and Sum Rate Maximization for the SCMA Cellular Network Coexisting with D2D Communications
View PDFAbstract:Sparse code multiple access (SCMA) is the most concerning scheme among non-orthogonal multiple access (NOMA) technologies for 5G wireless communication new interface. Another efficient technique in 5G aimed to improve spectral efficiency for local communications is device-to-device (D2D) communications. Therefore, we utilize the SCMA cellular network coexisting with D2D communications for the connection demand of the Internet of things (IOT), and improve the system sum rate performance of the hybrid network. We first derive the information-theoretic expression of the capacity for all users and find the capacity bound of cellular users based on the mutual interference between cellular users and D2D users. Then we consider the power optimization problem for the cellular users and D2D users jointly to maximize the system sum rate. To tackle the non-convex optimization problem, we propose a geometric programming (GP) based iterative power allocation algorithm. Simulation results demonstrate that the proposed algorithm converges fast and well improves the sum rate performance.
Submission history
From: Yukai Liu [view email][v1] Mon, 19 Sep 2022 06:32:29 UTC (1,400 KB)
[v2] Wed, 21 Sep 2022 04:35:29 UTC (1,219 KB)
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