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- W3067861446 abstract "In this paper, a non-orthogonal multiple access (NOMA) system with partial channel state information (CSI) for downlink and uplink transmission in mobile scenarios is considered, i.e., users are deployed randomly and will move casually around the base station (BS). In this case, the channel gain of each user varies over time, which has an influence on the performance of conventional NOMA. An analytical framework is developed to evaluate the impact of position estimation deviation in terms of decoding order error probability, average sum rate and outage probability. Based on the framework, dynamic power allocation (DPA) for downlink NOMA and dynamic power control (DPC) for uplink NOMA are put forward to optimize the outage performance with user distance information. It has been shown that the performance of NOMA relies on accurate user position information. To this end, two algorithms based on position filtering are proposed to improve the accuracy of user position. Monte Carlo simulation is presented to demonstrate the improvement of spectrum efficiency and outage performance. Simulation results verify the accuracy of the proposed analytical framework." @default.
- W3067861446 created "2020-08-24" @default.
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- W3067861446 date "2018-11-07" @default.
- W3067861446 modified "2023-09-27" @default.
- W3067861446 title "Position Information-based NOMA for Downlink and Uplink Transmission in Mobile Scenarios" @default.
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- W3067861446 doi "https://doi.org/10.48550/arxiv.1811.02859" @default.
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