Full-Duplex RF Canceler Achieving Wideband High-SI-Power Low-Noise Cancellation Through A Novel N-Path-Filter-Based Architecture and ML-Based Canceler Configuration

📋 论文概要

该论文提出了一种基于N路径滤波器架构的新型全双工射频消除器，通过滤波器堆叠实现无源抽头合并以降低噪声系数退化，并采用子周期旋转技术扩展频率偏移范围，结合机器学习算法优化配置，解决了宽带高自干扰功率下的低噪声消除难题。

💡 主要创新点

• 提出基于N路径滤波器堆叠的无源抽头合并架构，显著降低噪声系数退化。
• 采用子周期旋转技术，使旋转时钟路径无源频率偏移的最大频率偏移量翻倍，实现宽带自干扰消除。
• 引入基于机器学习的消除器配置算法，仅需有限次测量即可优化性能。

🏷 关键词

📄 原文摘要

Abstract We present a novel RF canceller that utilizes (i) a novel N-path-filter-based architecture that uses filter stacking to achieve passive tap combining leading to a lower NF degradation, (ii) a sub-cycle rotation technique that doubles the largest frequency shift possible in a rotary clock-path passive-frequency-shifting technique enabling wideband SIC, and (iii) an MLbased canceler configuration algorithm that requires only a limited number of canceller measurements. Self-interference cancellation (SIC) for full-duplex (FD), frequency-division duplex (FDD), and co-site interference mitigation is drawing significant interest from commercial and defense applications alike. In defense applications, enabling FD operation in arrays (Fig. 6.1.1) enables multifunctional operation across communication, radar and electronic warfare (EW), concurrent use of threat detection and reactive jamming for EW, and conducting blueforce communications with the same hardware [1], resulting in Microe

👥 作者与机构

Lakshminarasimha Sastry Garimella, Alfred Davidson, Nishant Patil, Yuan Ma, Ammaar Junaid, Kaustubh Pabba, Harish Krishnaswamy

Columbia University, New York, NY