同频同时全双工数字自干扰抵消算法

摘要

同频同时全双工是第五代移动通信（5G）提出的核心概念之一，其关键技术为自干扰抵消。其中数字抵消具备灵活高效的优势，进一步提高其性能是降低全双工节点的成本、功耗和复杂度的重要途径。首先介绍了基本数字抵消算法———信道估计重构法的原理；然后从提高自适应性、提高自干扰信号还原准确性以及实现简化三个角度介绍了改进算法；最后，展望了全双工数字自干扰抵消算法未来的研究方向，为全双工架构和算法设计提供参考。%In-band full duplex is a key concept brought up in 5G,of which the key technology is self-interference (SI)cancel-lation.Since digital cancellation is simpler,more flexible and more efficient among all the cancellation techniques,it has attrac-ted much attention and become a promising way to reduce the cost,power consume as well as complexity.This paper firstly in-troduced the principle of the basic digital cancellation algorithm,namely,channel estimation and self-interference reconstruc-tion.And then it gave some recent researches on modified algorithms for either developing the adaptability and the accuracy of reconstructed SI or implementation simplification.Finally,it provided an outlook of the future work as a possible reference for the full duplex architectures and cancellation algorithms design.