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Successive Refinement Coding and SWIPT for Energy-Efficient Cooperative NOMA Systems
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DOI：10.1109/TBC.2025.3635396.png)
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Abstract
En 中文
Successive refinement (SR) coding has been integrated into cooperative non-orthogonal multiple access (CO-NOMA) to improve transmission efficiency. This paper further incorporates simultaneous wireless information and power transfer (SWIPT) into the SR-based CO-NOMA framework, enabling the relay user to operate using harvested energy and thereby reducing system power consumption. Assuming block Rayleigh fading channels, closed-form expressions for the outage probability are derived. The power allocation ratio and power splitting factor are jointly optimized to enhance system performance. Under a fixed total transmit power constraint, the proposed SWIPT-enabled system achieves significantly lower outage probabilities than the conventional CO-NOMA counterpart without SWIPT. The performance gain is further evaluated across different relay locations.
Keywords:
Cooperative non-orthogonal multiple access (CO-NOMA)
simultaneous wireless information and power transfer (SWIPT)
decode-and-forward
successive refinement
outage probability
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