On the spectral efficient nonorthogonal multiple access schemes
conference contribution
posted on 2016-09-06, 00:00 authored by Jinho Choi© 2016 IEEE. In this paper, we introduce a nonorthogonal multiple access scheme, called relay-aided multiple access (RAMA), which is based on network coding. This scheme is compared with a well-known scheme, nonorthogonal multiple access (NOMA), which is based on superposition coding. Both the schemes can increase the spectral efficiency by supporting two users in the same frequency band and time slot. To compare them, we consider the sum rate, which is the sum of achievable rates of uplink and downlink transmissions of two users, and study a sum rate maximization problem with transmission power constraints. Based on sum rate analysis, we can show that each scheme can perform better than the other under different conditions. Thus, we can enjoy a degree of freedom to choose one of them depending on conditions to improve the spectral efficiency.
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Pagination
277-281Location
Athens, GreecePublisher DOI
Start date
2016-06-27End date
2016-06-30ISBN-13
9781509028931Language
engPublication classification
E Conference publication, E1.1 Full written paper - refereedTitle of proceedings
EUCNC 2016 - European Conference on Networks and CommunicationsEvent
European Conference on Networks and Communications (2016 : Athens, Greece)Publisher
IEEEPlace of publication
Piscataway, N.J.Usage metrics
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