一种基于正交信号的全双工双向中继方法

A Full Duplex Two-way Relaying Method Based on Quadrature Signal

面向三节点两跳中继系统,利用正交信号实现自干扰隔离,提出一种新颖的全双工双向中继方法。设计了QAM星座的分配方式,信息帧格式及传输协议。研究了星座点的去噪转发映射,以及同相分量R和正交分量J因信道系数的影响而失去正交后的星座对齐等使能技术。中继方法实施简易,成本低,特别适用于因物联网的到来而大量涌现的小尺寸节点进行中继协作通信。

Oriented to the three-node two-hop relay system,a novel full duplex two-way relaying method is proposed,by making use of quadrature signal to realize self-interference isolation.The assigning mode of QAM constellation,as well as the information frame format and transmission protocol,are designed.Some enabling techniques are further studied,such as,the denoising-forward mapping of constellation points,the constellation alignment due to the loss of orthogonality between the in phase component R and quadrature component J under the channel coefficient influence.The relaying method has the advantages of simplicity to implement and low cost,and is especially suitable for small-size devices to realize relaying communication,which appeared in abundance with the arrival of the Internet of things.