A 26GHz Full-Duplex Circulator Receiver with 53dB/400MHz (40dB/800MHz) Self-Interference Cancellation for mm-Wave Repeaters

📋 论文概要

该论文提出了一种26GHz全双工循环器接收机，用于毫米波中继器，通过自干扰消除技术实现53dB/400MHz（40dB/800MHz）的隔离度，解决了毫米波5G NR中继器/中继节点的全双工通信问题，提升了频谱效率和覆盖范围。

💡 主要创新点

• 提出了一种基于循环器的全双工接收机架构，在毫米波频段实现共享天线接口的收发隔离。
• 实现了宽带自干扰消除，在400MHz带宽内达到53dB消除深度，在800MHz带宽内达到40dB消除深度。

🏷 关键词

📄 原文摘要

Reduction in base-station deployment costs while increasing coverage has motivated Integrated Access and Backhaul (IAB) nodes in mm-wave 5G NR (Fig. 14.3.1). Similarly, high path loss due to shadowing and limited outdoor-to-indoor penetration at mm-wave has led to an interest in repeater/relays to extend 5G NR coverage [1]. Currently, halfduplex links based on TDD (preferred for IAB), FDD, spatial, and polarization-duplex are explored, targeting mm-wave TX/RX isolation at the cost of channel capacity. While mmwave in-band full-duplex (IBFD) with shared antenna (ANT) interface can enable spectrum reuse in IAB and repeaters/relays, >100dB total self-interference cancellation (SIC) is required with up to 50dB of SIC in the mm-wave front-end [2]. Such SIC has been shown for IBFD at RF [3-5], however mm-wave IBFD SIC with a shared antenna interface has been limited to 20dB at 28GHz and 40dB (22dB at +10dBm TX SI power)

👥 作者与机构

Robin Garg, Sanket Jain, Paul Dania, Arun Natarajan

Oregon State University, Corvallis, OR