最小化具有无线携能通信的全双工中继系统发射功率和

考虑在无线网络中采用信息与能量同步传输来提高无线中继系统的性能，提出了基于无线射频网络中采用无线携能通信（SWIPT）技术的具有自能量回收的双向传输全双工中继系统。SWIPT应用在双向全双工中继系统中是一个新的尝试，其中能量受限的目的节点使用从中继和环路信道捕获的能量来发送反馈信息，并给出了全双工中继系统工作的逻辑结构和能量受限的目的节点的物理结构。然后，以最小化系统发射功率和作为优化目标来描述系统的性能，采用功率分配方案进行信息解码和能量捕获，应用半定规划、秩松弛和拉格朗日方法将原始非凸优化方程转化为可解凸优化问题并求解，且联合优化了中继发射功率、发射波束成形向量和功率分配比率。最后，实验仿真对比了所提的新系统与传统双向传输中继系统，结果验证了利用自能量回收不仅可以消除自干扰，而且可以显著优化系统发射功率和，且由于SWIPT技术与全双工中继系统的结合，使得所提出的系统比传统的双向传输系统具有更高的性能增益。

Minimizing transmit power sum of full-duplex relay system with simultaneous wireless information and power transmission

Considering the adoption of information and energy simultaneous transmission in wireless networks to improve the performance of wireless relay systems， a bidirectional transmission full-duplex relay system with self-energy recycling based on wireless radio frequency network was proposed by using Simultaneous Wireless Information and Power Transmission （SWIPT） technology. It is a new attempt to apply SWIPT in bidirectional full-duplex relay system. The energy-constrained destination node used the energy harvested from the relay and the loop channel to send feedback information， and the logical structure of the full-duplex relay system and the physical structure of the energy-constrained destination node were given. Then， the system performance was described by using the minimization of the system transmit power sum as the optimization target， the power allocation scheme was used for information decoding and energy harvest， the semi-definite programming， rank relaxation and Lagrange methods were used to transform the original non-convex optimization equation into a solvable convex optimization problem， and the solution of the problem was found. The relay transmission power， transmit beamforming vector and power allocation ratio were jointly optimized. Finally， the proposed system was compared with the traditional bidirectional transmission relay system by experimental simulator. The results verify that the self-energy recycling can not only eliminate self-interference， but also significantly optimize the system transmission power sum， and reveal that the proposed system has higher performance gain than the traditional bidirectional transmission system due to the combination of SWIPT technology and full-duplex relay system.