Forwarding Strategy Selection in Dual-Hop NOMA Relaying Systems
- 8 February 2018
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Communications Letters
- Vol. 22 (8), 1644-1647
- https://doi.org/10.1109/lcomm.2018.2803809
Abstract
Non-orthogonal multiple-access (NOMA) with perfect successive interference cancellation (SIC) is an emerging research topic in the future wireless communication systems. In this work, NOMA is applied to dual-hop relaying systems, where the signals are transmitted with the aid of either decodeand- forward (DF) or amplify-and-forward (AF) relay. Exact expressions for outage probability and ergodic capacity are derived over independent Rayleigh fading channels, and a tight upper bound for the outage probability of AF scheme is provided. Based on the analysis, we study forwarding strategy selection for both fixed user allocation and optimized power allocation. The presented simulations verify the accuracy of the analysis, and the efficiency of the proposed forwarding strategy.Keywords
Funding Information
- National Natural Science Foundation of China (61571373, U1734209, U1709219)
- Key International Cooperation Project of Sichuan Province (2017HH0002)
- NSFC China-Swedish Project (6161101297)
- 111 Project (111-2-14)
- EU Marie Sklodowska-Curie individual Fellowship (796426)
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