2023 Fiscal Year Annual Research Report
| Project/Area Number |
20K04493
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| Research Institution | Doshisha University |
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Principal Investigator |
程 俊 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 | wireless communications / sensor networks / massive random-access / channel coding / fading channel / slotted ALOHA |
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| Outline of Annual Research Achievements |
In this extension year, we extend our work from the irregular repetition slotted ALOHA (IR-SA) scheme to the coded slotted ALOHA (C-SA) scheme. We derive two theoretical bounds of C-SA over fading channels: a belief propagation (BP) threshold and a converse bound. The converse bound expresses an impossibility threshold to be approached and the tight bound is guidelines for the practical implementation of C-SA. The numerical results show that the C-SA scheme provides more flexible values of energy efficiency and higher BP thresholds than those of the IR-SA. The converse bound is tight in the sense that the BP threshold of a spatially coupled scheme is close to it.
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