In this paper, we propose a uplink (UL) non-orthogonal multiple access (NOMA) systems equipped with multiple antennas to enhance the sum capacity of UL. In the proposed UL NOMA system, a base station (BS) with N antennas can support 2N users by sharing the space resource. However, sharing the space resource leads to interference between users. Therefore, to mitigate the interference and improve the sum capacity, we additionally propose a set selection algorithm and power control scheme. The set selection algorithm, which selects 2N users based on orthogonality and gain-difference between their channels, reduces the interference between users. Furthermore, the power control scheme can maximize the sum capacity with ensuring minimum target rate. Numerical results show that the proposed system improves the sum capacity over that of the conventional orthogonal multiple access (OMA) system.
|Title of host publication||2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Publication status||Published - 2015 Jul 1|
|Event||81st IEEE Vehicular Technology Conference, VTC Spring 2015 - Glasgow, United Kingdom|
Duration: 2015 May 11 → 2015 May 14
|Name||IEEE Vehicular Technology Conference|
|Other||81st IEEE Vehicular Technology Conference, VTC Spring 2015|
|Period||15/5/11 → 15/5/14|
Bibliographical notePublisher Copyright:
© 2015 IEEE.
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics