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NOMA-Based Coded Slotted ALOHA for Machine-Type Communications
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DOI：10.1109/LCOMM.2021.3067932.png)
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Abstract
En 中文
In this letter, non-orthogonal multiple access based coded slotted ALOHA (NOMA-CSA) for machine-type communications (MTC) is proposed, in which encoded segments are transmitted with discrete power levels. Most collided segments can be successfully decoded by using the successive interference cancellation (SIC) and maximum-a-posteriori (MAP) erasure decoding. To further improve performance, the code degree distribution and the power distribution for the different number of power levels are jointly optimized, which leads to considerable performance improvement. Numerical results verify our analysis and show that the NOMA-CSA greatly outperforms conventional schemes in terms of throughput and packet loss rate (PLR).
Keywords:
Silicon carbide
Performance evaluation
NOMA
Fading channels
Interference
Power distribution
Protocols
Random access
CSA
machine-type communications (MTC)
NOMA
SIC
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