Results 51 to 60 of about 13,256 (188)

A General MIMO Framework for NOMA Downlink and Uplink Transmission Based on Signal Alignment [PDF]

, 2015
The application of multiple-input multiple-output (MIMO) techniques to non-orthogonal multiple access (NOMA) systems is important to enhance the performance gains of NOMA. In this paper, a novel MIMO-NOMA framework for downlink and uplink transmission is
Ding, Zhiguo, Poor, H. Vincent, Schober, Robert   +2 more
core   +2 more sources

Downlink Non-Orthogonal Multiple Access (NOMA) in Poisson Networks

IEEE Transactions on Communications, 2019
A network model is considered where Poisson distributed base stations transmit to $N$ power-domain non-orthogonal multiple access (NOMA) users (UEs) each {that employ successive interference cancellation (SIC) for decoding}. We propose three models for the clustering of NOMA UEs and consider two different ordering techniques for the NOMA UEs: mean ...
Konpal Shaukat Ali, Martin Haenggi, Hesham ElSawy, Anas Chaaban, Mohamed-Slim Alouini   +4 more
openaire   +3 more sources

Performance of Downlink NOMA for a Massive IoT Network Over a Nakagami-m Fading Channel With Optimized Power Allocation

IEEE Access, 2023
Non-orthogonal multiple access (NOMA) is a multiple access technology that can provide efficient spectrum utilization and increased channel capacity on Internet of Things (IoT) networks.
Rummi Sirait, Wibowo Hardjawana, Gunawan Wibisono   +2 more
doaj   +1 more source

Fundamental Limits of Spectrum Sharing for NOMA-based Cooperative Relaying

, 2018
Non-orthogonal multiple access (NOMA) and spectrum sharing (SS) are two emerging multiple access technologies for efficient spectrum utilization in the fifth-generation (5G) wireless communications standard.
Cardiff, Barry, Flanagan, Mark. F., Kumar, Vaibhav   +2 more
core   +1 more source

Relay Selection for Cooperative NOMA

, 2016
This letter studies the impact of relay selection (RS) on the performance of cooperative non-orthogonal multiple access (NOMA). In particular, a two-stage RS strategy is proposed, and analytical results are developed to demonstrate that this two-stage ...
Dai, Huaiyu, Ding, Zhiguo, Poor, H. Vincent   +2 more
core   +1 more source

Fairness Comparison of Uplink NOMA and OMA

, 2017
In this paper, we compare the resource allocation fairness of uplink communications between non-orthogonal multiple access (NOMA) schemes and orthogonal multiple access (OMA) schemes.
Guo, Jiajia, Ng, Derrick Wing Kwan, Wei, Zhiqiang, Yuan, Jinhong   +3 more
core   +1 more source

On Power Minimization for Non-orthogonal Multiple Access (NOMA)

IEEE Communications Letters, 2016
We formulate a power optimization problem for non-orthogonal multiple access systems mathematically, and prove its NP-hardness. For tackling the problem, we first identify a convex problem by relaxation. Based on this convexity, we then propose an efficient “relax-then-adjust” algorithm and provide results of performance evaluation.
Lei Lei, Di Yuan, Peter Varbrand
openaire   +3 more sources

Progressive Pattern Interleaver with Multi-Carrier Modulation Schemes and Iterative Multi-User Detection in IoT 6G Environments with Multipath Channels

Sensors
Sixth-generation (6G) wireless networks demand a more efficient implementation of non-orthogonal multiple access (NOMA) schemes for severe multipath fading environments to serve multiple users.
Shivani Dixit, Varun Shukla, Manoj Kumar Misra, Jose M. Jimenez, Jaime Lloret   +4 more
doaj   +1 more source

Impact of clipping noise on the sum rate of NOMA with PD-DCO-OFDM and conventional DCO-OFDM

Heliyon, 2020
sIn visible light communication (VLC) systems, a non-orthogonal multiple access (NOMA) scheme is deemed promising technology to offer better spectral efficiency than the Orthogonal multiple access (OMA) scheme.
Zelalem Hailu Gebeyehu
doaj   +1 more source

Is NOMA Efficient in Multi-Antenna Networks? A Critical Look at Next Generation Multiple Access Techniques

IEEE Open Journal of the Communications Society, 2021
In the past few years, a large body of literature has been created on downlink Non-Orthogonal Multiple Access (NOMA), employing superposition coding and Successive Interference Cancellation (SIC), in multi-antenna wireless networks.
Bruno Clerckx, Yijie Mao, Robert Schober, Eduard A. Jorswieck, David J. Love, Jinhong Yuan, Lajos Hanzo, Geoffrey Ye Li, Erik G. Larsson, Giuseppe Caire   +9 more
doaj   +1 more source