Abstract
Non-Orthogonal Multiple Access (NOMA) for a multi-user single- input single-output (SISO) setup is studied in the power and the frequency domains simultaneously. The problem of sum-bandwidth minimization under perfect channel state information is solved for various combinations of rate requirements and user pairings. In this process, an iterative Tabu-search based algorithm is applied to avoid an exhaustive search over all possible user pairing combinations. It is assumed that each constituent user of the pair has a required quality of service and a flat power spectrum. Further, for each user pair, the NOMA operating region is defined by dividing the allocated bandwidth into two non-overlapping Orthogonal Multiple Access (OMA) sub-bands and an overlapping NOMA sub-band. Such an assumption achieves a greater capacity region when compared to the conventional power domain only NOMA. Also for most of the rate requirements, only one of the OMA sub-bands is active in addition to the NOMA sub-band. This simplifies the NOMA user rate expressions and power allocation process. To verify the performance gain, NOMA is compared to an OMA technique.
| Original language | English |
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| Title of host publication | IEEE 85th Vehicular Technology Conference |
| Subtitle of host publication | VTC2017-Spring |
| Publisher | IEEE - Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 978-1-5090-5932-4 |
| ISBN (Print) | 978-1-5090-5933-1 |
| DOIs | |
| Publication status | Published - 2017 Jun 4 |
| Event | 85th IEEE Vehicular Technology Conference, VTC Spring 2017 - Sydney, Australia Duration: 2017 Jun 4 → 2017 Jun 7 |
Conference
| Conference | 85th IEEE Vehicular Technology Conference, VTC Spring 2017 |
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| Country/Territory | Australia |
| City | Sydney |
| Period | 2017/06/04 → 2017/06/07 |
Subject classification (UKÄ)
- Communication Systems