A 0.072mm2 18-to-21GHz Non-Uniform Sub-Sampling Receiver with a Non-Uniform Discrete-Time FIR Filter Achieving 42dB Blocker Rejection in 28nm CMOS

📋 论文概要

该论文提出了一种18-21GHz非均匀子采样接收机，通过非均匀离散时间FIR滤波器解决均匀子采样中的破坏性混叠问题，实现了42dB阻塞抑制，芯片面积仅0.072mm²。

💡 主要创新点

• 采用非均匀子采样架构替代传统均匀子采样，避免了对输入信号严格带通滤波的要求，简化了系统设计。
• 引入非均匀离散时间FIR滤波器，在低时钟频率下实现高效信号下变频和阻塞抑制，显著降低面积和功耗。

🏷 关键词

📄 原文摘要

Conventional wireless receivers employing a heterodyne/homodyne architecture or Npath filter often result in a significantly higher area and power overhead owing to the requirement of LO generation and distribution at high frequencies [1]. Those overheads can be alleviated by uniform sub-sampling (USS) architectures that directly sample the RX input signal at a much lower clock frequency and rely on a particular harmonic aliasing for signal downconversion and reconstruction [2]. Such receivers require the desired signal to be strictly bandpass filtered, otherwise destructive aliasing would happen if blockers exist at other harmonics of the sub-sampling frequency, and hence compromise signal integrity. A non-uniform sub-sampling (NUSS) technique was presented in [3] to avoid such destructive in-band aliasing. It spreads the blocker energy appearing at those unwanted harmonics to out-of-band (OOB) frequencies after

👥 作者与机构

Mostafa Ayesh, Soumya Mahapatra, Ce Yang, Mike Shuo-Wei Chen

University of Southern California, Los Angeles, CA