Simultaneous Wireless Information and Power Transfer in Cooperative NOMA Systems
Summary
Simultaneous Wireless Information and Power Transfer (SWIPT) has emerged as a key enabler for energy-constrained wireless devices by harvesting energy and decoding information from the same radio-frequency transmission. When combined with cooperative Non-Orthogonal Multiple Access (NOMA), SWIPT systems leverage power-domain multiplexing and user cooperation to enhance both spectral and energy efficiency. In a typical configuration, a base station transmits a superposed signal to two or more users; the stronger user harvests energy from the received signal and then acts as a relay to assist the weaker user. Two principal protocols—time-switching and power-splitting—govern the trade-off between energy harvesting and information decoding. Optimisation of relay selection, beamforming design and decoding order through resource-allocation frameworks can substantially lower outage probability, boost throughput and improve fairness. This integrated approach addresses the demands of the Internet of Things, 5G and beyond by extending device lifetimes, reducing reliance on batteries and supporting diverse quality-of-service requirements in dynamic fading environments.
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Simultaneous Wireless Information and Power Transfer in Cooperative NOMA Systems publication trend
The graph below shows the total number of articles in simultaneous wireless information and power transfer in cooperative noma systems across all publications each year (not limited to Nature Index journals).
Technical terms
SWIPT: A technique that allows devices to harvest energy and decode information from the same radio-frequency signal.
NOMA: A multiple access method that multiplexes users in the power domain to improve spectral efficiency.
Cooperative relay: A transmission strategy where a capable user assists another by forwarding data using harvested or stored energy.
Beamforming: A signal-processing technique that directs transmission or reception using antenna arrays to enhance signal quality.
Successive Interference Cancellation (SIC): A decoding method that iteratively removes stronger signals to extract weaker ones in NOMA systems.
Outage Probability: The likelihood that the communication rate falls below a required threshold due to channel conditions or interference.
References
- Performance analysis of NOMA enabled multi-user co-operative IoT network with SWIPT protocol. Journal of King Saud University - Computer and Information Sciences (2023).
- Low-Complexity PSO-Based Resource Allocation Scheme for Cooperative Non-Linear SWIPT-Enabled NOMA. IEEE Access (2022).
- Evaluation of Full-Duplex SWIPT Cooperative NOMA-Based IoT Relay Networks over Nakagami-m Fading Channels. Sensors (2022).
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