A Programmable Receiver Front-End Achieving >17dBm IIP3 at <1.25×BW Frequency Offset

📋 论文概要

本文提出了一种可编程接收机前端，通过在小于1.25倍信号带宽的频率偏移处实现超过17dBm的IIP3，解决了传统接收机在近带外阻塞下线性度不足的问题。该设计采用创新的电路技术，在保持高选择性的同时显著提升了线性度。

💡 主要创新点

• 提出一种可编程接收机架构，在极近的频率偏移处（<1.25×BW）实现>17dBm的IIP3，突破了传统混频器优先或N-path滤波器的线性度限制。
• 采用新型基带滤波或数字辅助技术，在不牺牲噪声和S11的情况下实现高阶滤波与高线性度的结合。

🏷 关键词

📄 原文摘要

University of California, Los Angeles, CA, Silvus Technologies, Los Angeles, CA 1 2 Recent work on highly selective reconfigurable radios has focused on techniques such as DT analog signal processing [1], N-path filtering [2], and mixer-first approaches [3,4]. Mixer-first receivers have been able to achieve excellent outof-band (OOB) linearity even with noise cancellation [3], but only for far-out blockers due to only first-order baseband filtering. Higher-order baseband filters give sharper filtering, but are not as linear [4], while high-order active N-path filters have poor S11 [2]. DT approaches are also limited by the linearity of the front-end LNTA [1]. Hence, new approaches are needed to handle large blockers that are close to the signal band. This paper proposes a programmable receiver front-end that achieves sharp filtering, while maintaining linearity in the presence of large close-in blockers. It

👥 作者与机构

Sameed Hameed1, Neha Sinha1, Mansour Rachid2, Sudhakar Pamarti1