A Wideband Scheduling Method for Non-Orthogonal Multiple Access in the Vienna LTE-A Downlink System-Level Simulator

2016 ◽  
Author(s):  
Quang-Tuan Thieu ◽  
Chun-Hsiung Wang ◽  
Hung-Yun Hsieh
Keyword(s):  
Multiple Access ◽  
System Level ◽  
Scheduling Method ◽  
Downlink System

scholarly journals A Multi-User Schedule Method for Non-Orthogonal Multiple Access in 5G Heterogeneous Network

2019 ◽  
Vol 37 (2) ◽  
pp. 337-343
Author(s):  
Yi Xie
Keyword(s):  
Heterogeneous Network ◽  
Network Architecture ◽  
Multiple Access ◽  
Average Rate ◽  
Small Cells ◽  
Fifth Generation ◽  
Scheduling Method ◽  
New Type ◽  
Multiuser Scheduling ◽  
Better Than

Heterogeneous network is supposed to be the dominant network architecture of the fifth generation (5G) cellular network, which means small cells are overlaid on the macrocell. The beamforming (BF) and cell expansion are two important approaches to serve users in small cells. Furthermore, non-orthogonal multiple access (NOMA) is a new type of multiple access multiplexing which improves system performance without taking up extra spectrum resources. Therefore, it becomes one promising technique in 5G. In this paper, NOMA is applied in a 5G heterogeneous network with biased small cells. The BF strategy and the multiuser scheduling method are proposed. The main user in NOMA is scheduled inside the original coverage of the small cell while the side user is chosen from the biased expansion area. The BF strategy that is executed depends on the channel of main user. The multiuser scheduling method is to maximize the rate performance. The proposed method can provide performance benefits. Simulation results show that the proposed methods can be well applied in heterogeneous networks. The achieved performance gain is approximately twice better than traditional OMA and has 10% improvement to the stochastic schedule method. In addition, the average rate of cell edge users is improved.

Comparison of Multiple Access Schemes for an OFDM Downlink System

1997 ◽  
pp. 23-30 ◽  
Author(s):  
Hermann Rohling ◽  
Karsten Brüninghaus ◽  
Rainer Grünheid
Keyword(s):  
Multiple Access ◽  
Multiple Access Schemes ◽  
Downlink System

scholarly journals Link and System-Level NOMA Simulator: The Reproducibility of Research

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2388
Author(s):  
Arsla Khan ◽  
Muhammad Arslan Usman ◽  
Muhammad Rehan Usman ◽  
Muneeb Ahmad ◽  
Soo-Young Shin
Keyword(s):  
Spectral Efficiency ◽  
Channel Coding ◽  
Multiple Access ◽  
Performance Metrics ◽  
Fold Increase ◽  
System Level ◽  
Intercell Interference ◽  
The Many ◽  
Level Analysis

This study focuses on the design of a MATLAB platform for non-orthogonal multiple access (NOMA) based systems with link-level and system-level analyses. Among the different potential candidates for 5G, NOMA is gaining considerable attention owing to the many-fold increase in spectral efficiency as compared to orthogonal multiple access (OMA). In this study, a NOMA simulator is presented for two and more than two users in a single cell for link-level analysis; whereas, for system-level analysis, seven cells and 19 cells scenarios were considered. Long-term evolution (LTE) was used as the baseline for the NOMA simulator, while bit error rate (BER), throughput and spectral efficiency are used as performance metrics to analyze the simulator performance. Moreover, we demonstrated the application of the NOMA simulator for different simulation scenarios through examples. In addition, the performance of multi-carrier NOMA (MC-NOMA) was evaluated in the presence of AWGN, impulse noise, and intercell interference. To circumvent channel impairments, channel coding with linear precoding is suggested to improve the BER performance of the system.

scholarly journals Weighted Proportional Fair Scheduling for Downlink Nonorthogonal Multiple Access

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Marie-Rita Hojeij ◽  
Charbel Abdel Nour ◽  
Joumana Farah ◽  
Catherine Douillard
Keyword(s):  
Interference Cancellation ◽  
Multiple Access ◽  
System Throughput ◽  
Total System ◽  
Proportional Fair ◽  
Weight Calculation ◽  
Scheduling Method ◽  
Proportional Fair Scheduling ◽  
High Level

A weighted proportional fair (PF) scheduling method is proposed in the context of nonorthogonal multiple access (NOMA) with successive interference cancellation (SIC) at the receiver side. The new scheme introduces weights that adapt the classical PF metric to the NOMA scenario, improving performance indicators and enabling new services. The distinguishing value of the proposal resides in its ability to improve long-term fairness and total system throughput while achieving a high level of fairness in every scheduling slot. Finally, it is shown that the additional complexity caused by the weight calculation has only a limited impact on the overall scheduler complexity, while simulation results confirm the claimed improvements, making the proposal an appealing alternative for resource allocation in a cellular downlink system.

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