Wireless powered backscatter-aided cooperative communication scheme for IoT

Backscatter-NOMA Empowered Wireless Powered Cooperative Communications for Green IoT

“…Using the analysis carried out in our previous subsections and on substituting the obtained optimal values, we get the updated expressions of the weighted sum throughput with only τ as the optimization variable. A similar problem was encountered and handled in our previous work [16]. Accordingly, we have the following optimization problem, (P8) :…”

Backscatter-NOMA Empowered Wireless Powered Cooperative Communications for Green IoT

“…Using the analysis of previous subsections and on substituting the obtained optimal values, we get the following sub-problem in τ , similar to one encountered and handled in one of our previous works [4],…”

“…Therefore, employing BTs in large numbers will not only provide added advantages, such as cooperative beamforming, but will also have a negligible impact on the effective cost and power consumption of the overall system. In one of the earlier works [4], a cooperative WPCN with a single BT-EH device pair was investigated. However, the analysis considering multiple tags was not addressed and remains an interesting problem.…”