SWIPT-Enabled Multiple Access Channel: Effects of Decoding Cost and Non-linear EH Model

Abstract

We studied power splitting-based simultaneous wireless information and power transfer (PS-SWIPT) in multiple access channels (MAC), considering the decoding cost and non-linear energy harvesting (EH) constraints at the receiving nodes to study practical limitations of an EH communication system. Under these restrictions, we formulated and analyzed the achievable rate and maximum departure regions in two well-studied scenarios, i.e., a classical PS-SWIPT MAC and a PS-SWIPT MAC with user cooperation. In the classical PS-SWIPT MAC setting, closed-form expressions for the optimal values of the PS factors are derived for two fundamental decoding schemes: simultaneous decoding and successive interference cancellation. In the PS-SWIPT MAC with user cooperation, the joint optimal power allocation for users as well as the optimal PS factor are derived. This reveals that one decoding scheme outperforms the other in the classical PS-SWIPT MAC, depending on the function type of the decoding cost. Finally, it is shown that the cooperation between users can potentially boost the performance of a PS-SWIPT MAC under decoding cost and non-linear EH constraints. Moreover, effects of the decoding cost functions, non-linear EH model and channel quality between the users are studied, and performance characteristics of the system are discussed.

arXiv commentIEEE Transactions on Communications

References in corpus (9)

• Practical Non-linear Energy Harvesting Model and Resource Allocation for SWIPT Systems
• Simultaneous Wireless Information and Power Transfer in Modern Communication Systems
• Sensitive and Nonlinear Far Field RF Energy Harvesting in Wireless Communications
• Wireless Information and Energy Transfer in Multi-Antenna Interference Channel
• Energy Harvesting Broadband Communication Systems with Processing Energy Cost
• Power Allocation and Scheduling for SWIPT Systems with Non-linear Energy Harvesting Model
• A Generic Receiver Architecture for MIMO Wireless Power Transfer with Non-Linear Energy Harvesting
• SWIPT with Practical Modulation and RF Energy Harvesting Sensitivity
• Experimental Analysis of Harvested Energy and Throughput Trade-off in a Realistic SWIPT System