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Cooperative Non-Orthogonal Multiple Access in 5G Systems

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<mark>Journal publication date</mark>08/2015
<mark>Journal</mark>IEEE Communications Letters
Issue number8
Volume19
Number of pages4
Pages (from-to)1462-1465
Publication statusPublished
Early online date3/06/15
Original languageEnglish

Abstract

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.