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Performance Analysis of Decentralized V2X System with FD-NOMA

Zhang, D and Liu, Y and Dai, L and Bashir, AK and Nallanathan, A and Shim, B (2019) Performance Analysis of Decentralized V2X System with FD-NOMA. In: IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 22 September 2019 - 25 September 2019, Honolulu, HI, USA.

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Abstract

We introduce a full duplex non-orthogonal multiple access (FD-NOMA)-based decentralized vehicle to everything (V2X) system model and focus on its capacity performance analysis. In order to solve the computation complicated problems of the involved exponential integral functions and infinite factorial expressions, we give approximate closed-form expressions with controllable arbitrary small errors. We find the accuracy of our approximate expressions is controlled by the division of \frac{\pi}{2} in the urban and crowded (UC) scenario, and the truncation point T in the suburban and remote (SR) scenario. Numerical results manifest 1) Increasing the number of V2X device, NOMA power and Rician factor value yields better capacity performance. 2) Effect of FD-NOMA is determined by the FD self-interference and the channel noise. 3) FD-NOMA has better latency performance compared to other schemes.

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