A 0.1-to-3.1GHz 4-Element MIMO Receiver Array Supporting Analog/RF Arbitrary Spatial Filtering

📋 论文概要

本文提出了一种0.1-3.1GHz的4元素MIMO接收机阵列，支持模拟/RF域任意空间滤波，解决了传统数字阵列因缺乏RF/模拟空间干扰抑制而面临的动态范围挑战，能够同时抑制多个不同功率的空间干扰信号。

💡 主要创新点

• 首次在模拟/RF域实现任意空间滤波（而非单一陷波），可同时抑制多个空间干扰信号。
• 采用4元素MIMO接收机阵列架构，覆盖0.1-3.1GHz宽频带，支持多输出以兼容MIMO应用。

🏷 关键词

📄 原文摘要

Digital receiver (RX) arrays featuring ADCs at each element enable massive multiin-multi-out (MIMO) applications, but since spatial interference rejection is absent in the RF/analog domain, RF/analog/ADC dynamic range is challenged in an environment where strong and weak spatially distinct in-band signals co-exist. Recent MIMO RX array works [1,2] attempt to mitigate this problem with (single) spatial notch suppression in the RF/analog domain, while still maintaining multiple outputs to support MIMO. However, multiple spatial interference signals at different power levels can be present, and reflections and scattering can make the power distribution in the spatial domain more hostile. A single spatial notch is insufficient in such realistic scenarios. Secondly, the notch suppression bandwidth (BW) is typically limited, as is the case with conventional cancellation architectures. Thirdly, reconfigurable wideband MIMO RX arrays that rely on

👥 作者与机构

Linxiao Zhang, Harish Krishnaswamy

Columbia University, New York, NY