A Blocker-Tolerant Wideband Noise-Cancelling Receiver with a 2dB Noise Figure

📋 论文概要

该论文提出了一种具有高阻塞容限的宽带噪声消除接收机，解决了软件定义无线电中因缺乏窄带射频滤波而面临的带外阻塞干扰问题。通过采用噪声消除技术，实现了2dB的低噪声系数，同时保持了良好的线性度。

💡 主要创新点

• 提出了一种结合噪声消除与阻塞容限的接收机架构，在无需窄带射频滤波的情况下实现了低噪声系数和高线性度。
• 通过优化前端电路设计，有效降低了闪烁噪声转角频率，解决了传统混频器优先架构中噪声性能差的问题。

🏷 关键词

📄 原文摘要

narrowband off-chip RF filtering is not compatible with the concept of software-defined radio (SDR), an SDR receiver must be designed to tolerate large out-of-band blockers with minimal gain compression and noise figure degradation. A recent circuit [1] tackles this problem by dispensing with the LNA entirely. This mixer-first approach achieves impressive linearity, but at the expense of noise figure and, since such a receiver has no gain prior to down-conversion, the flicker noise corner can be unacceptably high. Other SDR attempts invariably use a noise-cancelling LNA at the front end, which provides wideband matching, however such approaches have either inadequate linearity [2] or display too large a noise for our purposes [3]. In this work, we propose a hybrid frequencytranslational, noise-cancelling (FTNC) receiver that employs two separate downcon

👥 作者与机构

David Murphy1,2, Amr Hafez1,2, Ahmad Mirzaei2, Mohyee Mikhemar2,

Hooman Darabi2, Mau-Chung Frank Chang1, Asad Abidi1 University of California, Los Angeles, Los Angeles, CA 2 Broadcom, Irvine, CA 1 As