Full-Duplex Receiver with Wideband Multi-Domain FIR

📋 论文概要

针对全双工接收机需要大于100dB自干扰对消和大延迟范围的问题，提出了一种基于堆叠电容和N-path开关电容延迟线的宽带多域FIR对消方案，实现了低功耗、大延迟范围的实时自适应对消。

💡 主要创新点

• 提出基于堆叠电容的N-path开关电容延迟线架构，实现宽带多域FIR对消，避免了传统频域均衡方案中多个高Q滤波器的功耗问题。
• 通过多域FIR结构同时实现频域和时域对消，支持大延迟范围并具有实时自适应能力。
• 利用堆叠电容技术提升延迟线信号摆幅和线性度，降低噪声和功耗。

🏷 关键词

📄 原文摘要

Aravind Nagulu*1, Sasank Garikapati*1, Mostafa Essawy2, Igor Kadota1, Tingjun Chen1, Arun Natarajan2, Gil Zussman1, Harish Krishnaswamy1 Columbia University, New York, NY Oregon State University, Corvallis, OR 1 2 *Equally-Credited Authors (ECAs) Full-duplex (FD) transceivers remain a significant challenge as they require >100dB of cancellation of high levels of self-interference (SI), recreation of large SI channel delay spreads, and real-time canceler adaptation. SI cancelers based on frequency-domain equalization (FDE) [1,2] demand multiple widely-tunable power-hungry high-Q filters, while those based on FIR-based time-domain equalization (TDE) [3-5] require large delays with fine resolution (see Fig. 6.6.1 for a system simulation based on the isolation profile of an SI channel, where the TX-RX leakage spreads across several 10s of nanoseconds). Additionally, supporting realistic antenna interface isolations of ~20dB requires

👥 作者与机构

Cancellation Based on Stacked-Capacitor, N-Path SwitchedCapacitor Delay Lines Achieving >54dB SIC Across 80MHz, BW and >15dBm TX Power-Handling