Sum Rate Analysis of Multi-pair Two-Way MIMO AF Relay System Based on Energy Harvesting[J]. Acta Electronica Sinica, 2019, 47(3): 531-537. DOI: 10.3969/j.issn.0372-2112.2019.03.003.
An energy harvesting method based on power splitting-based relay is adopted
where the relay converts part of the received radio frequency signals into energy and amplifies and forwards the remaining signal using the collected energy.By using maximum-ratio combining/maximum-radio transmission receiving and precoding technology at the relay node
the corresponding lower bound expressions for the ergodic rate of each user are derived and the optimal relay power allocation ratio which maximizes the sum rate of all users is calculated.The simulation results show that the maximum sum rate can be obtained under the optimal relay power allocation ratio
and the relationship between the sum rate with the number of relay antennas and the number of users is given.What's more
the performance of the relay system based on energy harvesting outperforms that without energy harvesting.