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Non-orthogonal multiple access (NOMA) has received considerable recent attention as a promising candidate for 5G systems. A key feature of NOMA is that users with better channel conditions have prior information about the messages of other users. This prior knowledge is fully exploited in this letter, where a cooperative NOMA scheme is proposed. The outage probability and diversity order achieved by this cooperative NOMA scheme are analyzed, and an approach based on user pairing is also proposed to reduce system complexity.
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Zhiguo Ding
Kunming University of Science and Technology
Mugen Peng
Beijing University of Posts and Telecommunications
H. Vincent Poor
University of Arkansas at Little Rock
IEEE Communications Letters
Princeton University
Lancaster University
Beijing University of Posts and Telecommunications
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Ding et al. (Thu,) studied this question.
synapsesocial.com/papers/69df473c915fa049536145a8 — DOI: https://doi.org/10.1109/lcomm.2015.2441064