Results 221 to 230 of about 97,210 (256)

Non-Orthogonal Multiple Access for Terahertz Communication Networks

2020 11th IEEE Annual Ubiquitous Computing, Electronics & Mobile Communication Conference (UEMCON), 2020
Terahertz communications is one of the promising technologies for the future mobile communication networks. Due to the ever increasing need for high-speed data transfer, higher bandwidths are required. As a solution, higher frequencies in the spectrum may be considered for future networks.
Oguz Ülgen, Serhat Erküçük, Tunçer Baykas   +2 more
openaire   +1 more source

A Survey of Non-Orthogonal Multiple Access for 5G

2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017
Compared to the traditional orthogonal multiple access (MA), non-orthogonal multiple access (NOMA) technology can achieve higher capacity gain and higher spectrum efficiency, support larger massive connectivity. In this article, according to signal transmission characteristic, the NOMA schemes are classified into four categories: scrambling based NOMA,
Kun Lu, Zhanji Wu, Xuanbo Shao
openaire   +1 more source

Throughput optimization of cooperative non orthogonal multiple access

Telecommunication Systems, 2020
This paper derives the outage and packet error probabilities of Non Orthogonal Multiple Access (NOMA) systems. In the first time slot, the Base Station transmits a combination of two symbols $$s_w$$ and
Ghassan Alnwaimi, Hatem Boujemaa, Kamran Arshad   +2 more
openaire   +1 more source

Non-Orthogonal Multiple Access

Advanced Computing and Communications, 2019
Non-orthogonal multiple access (NOMA) has been recently proposed as a technique to increase the network throughput and to support massive connectivity, which are major requirements in the fifth generation (5G) communication systems. The NOMA can be realized through two different approaches, namely, in (a) power-domain, and (b) code-domain. In the power-
openaire   +1 more source

Non-Orthogonal Multiple Access in the Presence of Phase Noise

IEEE Communications Letters, 2020
In the present letter, we investigate the impact of phase noise on multi-carrier wireless systems that employ non-orthogonal multiple access (NOMA). Specifically, we extract novel closed-form expressions for the outage probability. These expressions can quantify and evaluate the system performance for the general case in which different levels of inter-
Alexandros-Apostolos A. Boulogeorgos, Nestor D. Chatzidiamantis, George K. Karagiannidis   +2 more
openaire   +1 more source

Non-Orthogonal Multiple Access for Multiple-Antenna Relaying Networks

IEEE Communications Letters, 2015
In this letter, we design non-orthogonal multiple access (NOMA) for multiple-antenna relaying networks. The receive antennas at the mobile users are assumed to adopt maximal ratio combining (MRC), whereas the transmit antenna that maximizes the instantaneous signal-to-noise ratio (SNR) at the relay is selected.
Jinjin Men, Jianhua Ge
openaire   +1 more source

An Interval Clustering Algorithm for Non-orthogonal Multiple Access

2018 21st International Symposium on Wireless Personal Multimedia Communications (WPMC), 2018
In uplink power-domain NOMA, multiple users are divided into some groups and share the same channel resources. User clustering is a key factor on the performance of uplink NOMA. A novel user clustering algorithm called interval clustering algorithm is studied in this paper.
Tingting Ding, Xueyao Xia, Ningbo Zhang, Xiangqian Li   +3 more
openaire   +1 more source

Non-Orthogonal Multiple Access in Multi-UAV Networks

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019
In this paper, the application of non-orthogonal multiple access (NOMA) aided multiple unmanned aerial vehicles (UAVs) wireless networks is investigated in the downlink scenario. A new multiple UAVs framework, user-centric strategy for providing emergency services in the rural area, is proposed by utilizing a stochastic geometry model.
Tianwei Hou, Yuanwei Liu, Xin Sun 0008, Zhengyu Song, Yue Chen 0002   +4 more
openaire   +1 more source

Coordinated Non-Orthogonal Multiple Access (CO-NOMA)

2016 IEEE Global Communications Conference (GLOBECOM), 2016
We propose a Coordinated Non-Orthogonal Multiple Access (CO-NOMA) scheme for resource allocation in the context of mobile networks. NOMA refers to schemes where multiple users can access the wireless channel in the same frequency band simultaneously. In this study, we consider NOMA with power domain multiplexing, where the near- far property in space ...
Anthony Beylerian, Tomoaki Ohtsuki
openaire   +1 more source

Partial Non-Orthogonal Multiple Access (P-NOMA)

IEEE Wireless Communications Letters, 2019
In this letter, we propose a novel hybrid type of power-domain non-orthogonal multiple access (NOMA) in downlink environments, called partial NOMA (P-NOMA). In conventional NOMA, where the signals of user equipments (UEs) are fully overlapped, the utilization of the bandwidth can be maximized, but doing so also maximizes the interference from the other
Beomju Kim 0002, Yosub Park, Daesik Hong
openaire   +1 more source