Uplink NOMA with Multi-Antenna

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...

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Bibliographic Details
Published in2015 IEEE 81st Vehicular Technology Conference (VTC Spring) pp. 1 - 5
Main Authors Beomju Kim, Wonsuk Chung, Sungmook Lim, Sangwook Suh, Jonghyung Kwun, Sooyong Choi, Daesik Hong
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2015
Subjects
Antennas
Interference
Power control
Signal to noise ratio
Silicon carbide
Transmitters
Uplink
Online AccessGet full text
ISSN1550-2252
DOI10.1109/VTCSpring.2015.7146149

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Summary: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.
ISSN:1550-2252
DOI:10.1109/VTCSpring.2015.7146149