Receiver with Integrated Magnetic-Free N-Path-Filter-Based Non-Reciprocal Circulator and Baseband Self-Interference Cancellation for Full-Duplex Wireless

📋 论文概要

该论文提出了一种集成磁隔离器功能的非互易环行器，基于N-path滤波器技术，用于全双工接收机中的自干扰消除。解决了传统磁性环行器无法集成的问题，实现了高隔离度和低功耗的片上自干扰抑制。

💡 主要创新点

• 首次在CMOS工艺中实现基于N-path滤波器的非互易环行器，无需磁性材料。
• 将环行器与基带自干扰消除电路集成在同一接收机中，实现高隔离度。

🏷 关键词

📄 原文摘要

Full-duplex (FD) is an emergent wireless communication paradigm where the transmitter (TX) and the receiver (RX) operate at the same time and at the same frequency. The fundamental challenge with FD is the tremendous amount of TX self-interference (SI) at the RX. Low-power applications relax FD system requirements [1], but an FD system with -6dBm transmit power, 10MHz signal bandwidth and 12dB NF budget still requires 86dB of SI suppression to reach the -92dBm noise floor. Recent research has focused on techniques for integrated self-interference cancellation (SIC) in FD receivers [1-3]. Open challenges include achieving the challenging levels of SIC through multi-domain cancellation, and low-loss shared-antenna (ANT) interfaces with high TX-to-RX isolation. Sharedantenna interfaces enable compact form factor, translate easily to MIMO, and ease system design through channel reciprocity. In this paper, we present an FD receiver with an integrated magnetic-free N-pathfilter-based circula

👥 作者与机构

Jin Zhou, Negar Reiskarimian , Harish Krishnaswamy

Columbia University, New York, NY