2023 Fiscal Year Final Research Report
Random Access Communications over Fading Channels
| Project/Area Number |
20K04493
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | Doshisha University |
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Principal Investigator |
Cheng Jun 同志社大学, 理工学部, 教授 (00388042)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | random access / slotted ALOHA / fading channel / channel coding |
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| Outline of Final Research Achievements |
In this project, we provide the asymptotic analysis performance of the coded slotted ALOHA wireless communication systems over Rayleigh block fading channels. We give the asymptotic decoding thresholds of the average normalized offered traffic G of the systems, such as a belief propagation (BP) threshold, a maximum a posteriori (MAP) threshold, and a converse bound.
We show that, over fading channels, employing the intra-slot successive interference cancelation (SIC) enhances the BP thresholds. We also developed a spatially-coupled scheme through which the BP decoding threshold approaches the MAP threshold and approaches the converse bound.
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| Free Research Field |
通信工学
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| Academic Significance and Societal Importance of the Research Achievements |
This project derived several limited performances for random access protocols, and developed some practical transmission schemes, which approach these limit performance. Our work improves the energy and spectral efficiencies for machine-type communications and the Internet of Things.
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