NOMA-Based Random Access With Multichannel ALOHA
TLDR
In this paper, the power difference of multiple signals is exploited for multiple access and successive interference cancellation is employed at a receiver to mitigate co-channel interference, which can effectively increase the number of sub-channels without any bandwidth expansion.Abstract:
In nonorthogonal multiple access (NOMA), the power difference of multiple signals is exploited for multiple access and successive interference cancellation is employed at a receiver to mitigate co-channel interference. Thus, NOMA is usually employed for coordinated transmissions and mostly applied to downlink transmissions where a base station performs coordination for downlink transmissions with full channel state information. In this paper, however, we show that NOMA can also be employed for non-coordinated transmissions such as random access for uplink transmissions. We apply a NOMA scheme to multichannel ALOHA and show that the throughput can be improved. In particular, the resulting scheme is suitable for random access when the number of subchannels is limited since NOMA can effectively increase the number of subchannels without any bandwidth expansion.read more
Citations
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Journal ArticleDOI
A Survey on Non-Orthogonal Multiple Access for 5G Networks: Research Challenges and Future Trends
Zhiguo Ding,Xianfu Lei,George K. Karagiannidis,Robert Schober,Jinhong Yuan,Vijay K. Bhargava +5 more
TL;DR: In this paper, the authors provide an overview of the latest NOMA research and innovations as well as their applications in 5G wireless networks and discuss future challenges and future research challenges.
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A Survey on Non-Orthogonal Multiple Access for 5G Networks: Research Challenges and Future Trends
Zhiguo Ding,Xianfu Lei,George K. Karagiannidis,Robert Schober,Jinhong Yuan,Vijay K. Bhargava +5 more
TL;DR: In this paper, the authors provide an overview of the latest NOMA research and innovations as well as their applications in 5G wireless networks and discuss future research challenges regarding 5G and beyond.
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Grant-Free Non-Orthogonal Multiple Access for IoT: A Survey
TL;DR: Various grant-free NOMA schemes are presented, their potential and related practical challenges are highlighted, and possible future directions are thoroughly discussed at the end.
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IoT Connectivity Technologies and Applications: A Survey
TL;DR: In this paper, the authors provide a broad view of the existing wireless IoT connectivity technologies and discuss several new emerging technologies and solutions that can be effectively used to enable massive connectivity for IoT.
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Tactile Internet for Smart Communities in 5G: An Insight for NOMA-Based Solutions
TL;DR: This paper discusses the application-specific nonorthogonal multiple access (NOMA)-based communication architecture for Tactile Internet which allows nonorthogsonal resource sharing from a pool of eMBB, mMTC, cMTC, and URLLC devices to a shared base station.
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