12Mb/s 4×4 Ultrasound MIMO Relay with Wireless Power and Communication for Neural Interfaces

📋 论文概要

本文提出一种用于神经接口的12Mb/s 4×4超声波MIMO中继方案，同时实现无线供电和数据通信。解决了植入式设备在高数据率上行链路传输和无线供电方面的局限性。

💡 主要创新点

• 采用4×4超声波MIMO中继架构，同时实现无线供电和高速数据通信，克服了RF和Galvanic方案的深度和速率限制。
• 实现了12Mb/s的上行数据率，满足视网膜和脑机接口等神经记录阵列的高带宽需求。
• 利用超声波在体内的良好传播特性，支持小尺寸植入体，提升系统集成度。

🏷 关键词

📄 原文摘要

Neural interfaces, including retinal and brain implants, require increasing postcompression uplink data rates >10Mb/s to send data from larger and denser recording arrays. In retinal implants, electrical recording data from large arrays can be leveraged to identify cell types, stimulation thresholds, and locations to construct better stimulation patterns. Among current uplink solutions, RF has the highest data rate but has limited depth inside the body for small transmitter (Tx) sizes [1,2]. Galvanic solutions can achieve data rates ~10Mb/s [3] with low power and small form factor but have limited scaling in number of implants and data rate due to their omnidirectionality. Ultrasound (US) in implant applications can operate at depth with small transducers but has so far been limited to data rates <1Mb/s [4,5] due to power and area constraints. One of the key advantages of US inside the body is its low loss and small wavelength at

👥 作者与机构

Ernest So, Amin Arbabian

Stanford University, Stanford, CA