A 28GHz 4-Element MIMO Beam-Space Array in 65nm CMOS with Simultaneous Spatial Filtering and Single-Wire Frequency-Domain Multiplexing

📋 论文概要

该论文提出了一种28GHz四单元MIMO波束空间阵列，采用65nm CMOS工艺，通过单线频域复用实现同时空间滤波，解决了多波束/MIMO阵列中面积大和信号路由复杂的问题。

💡 主要创新点

• 提出波束空间架构，将多波束形成与空间滤波结合，减少芯片面积和路由复杂度。
• 采用单线频域复用技术，实现紧凑的片上信号分配。
• 在65nm CMOS中实现四单元阵列，支持MIMO操作。

🏷 关键词

📄 原文摘要

(ECAs) 1 2 High-data-rate wireless links at mm-wave have motivated the development of scalable, dense arrays with hundreds of elements [1,2]. The evolution from “multiple-input-single-output” phased arrays towards multibeam/MIMO arrays presents significant challenges. Firstly, increasing the number of beamforming blocks and outputs to preserve signals from every element increases IC area and makes compact on-package signal routing challenging. This limits a scalable unittile approach with λ/2×λ/2 spacing. Secondly, it is important to include spatial filtering in such MIMO arrays to mitigate blockers and reduce ADC dynamic-range requirements (Fig. 4.3.1) [4-6]. Thirdly, traditional digital beamforming requires the full aggregate IF interface bandwidth and all ADCs to operate irrespective of

👥 作者与机构

Robin Garg1, Gaurav Sharma*1, Ali Binaie*2, Sanket Jain*1,

Sohail Ahasan*2, Armagan Dascurcu2, Harish Krishnaswamy2, Arun Natarajan1 Oregon State University, Corvallis, OR Columbia University, New York, NY *Equally-Credited Authors