Journal
IEEE COMMUNICATIONS LETTERS
Volume 22, Issue 8, Pages 1644-1647Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2018.2803809
Keywords
Non-orthogonal multiple-access (NOMA); amplify-and-forward relaying; decode-and-forward relaying; forwarding strategy selection
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Funding
- 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 [796426]
- EPSRC [EP/P009719/1] Funding Source: UKRI
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Non-orthogonal multiple-access (NOMA) with perfect successive interference cancellation 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 decode-and-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 and optimized power allocation. The presented simulations verify the accuracy of the analysis, and the efficiency of the proposed forwarding strategy.
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