4.6 Article

A Fully-Reflective Wi-Fi-Compatible Backscatter Communication System With Retro-Reflective MIMO Gain for Improved Range

期刊

IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 58, 期 9, 页码 2501-2512

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2023.3281553

关键词

Backscatter communication; Internet-of-Things (IoT); low-power wireless system; range improvement; wake-up radios; Wi-Fi

向作者/读者索取更多资源

This article introduces an IC designed for long-range backscatter communication. The chip improves Wi-Fi backscatter systems by using a fully-reflective single-antenna backscatter solution and a retro-reflective MIMO approach. The chip also incorporates a wake-up scheme and achieves high synchronization accuracy. It consumes low power and achieves a significant AP-to-tag range.
This article presents an integrated circuit (IC) designed to enable low-power long-range backscatter communication with commodity Wi-Fi transceivers. The proposed chip endeavors to improve the most critical and difficult specification in Wi-Fi backscatter systems: range. It does so through two proposed techniques: 1) a fully-reflective single-antenna backscatter solution, whereby the termination of a power combiner always has a reflection coefficient near 1 to ensure high reflected power while enabling single-sideband (SSB) quadrature phase shift keying (QPSK) modulation with frequency-translation to separate Wi-Fi channel and 2) a retro-reflective multiple-in-multiple-out (MIMO) approach that redirects incident Wi-Fi signals, after SSB QPSK modulation, back to a colocated access point (AP) with MIMO gain. The proposed chip also implemented a counter-based wake-up scheme within a synchronization receiver (RX) to achieve standards-compatible wake-up with high synchronization accuracy. Implemented in 65-nm CMOS, the wake-up RX consumes 4.5 mu W and achieves a sensitivity of -43.5 dBm, while the synchronization RX consumes an average power of 4.8 mu W and achieves a synchronization accuracy of at least 150 ns for input power of -35 dBm or better. During backscattering, the IC consumes 32 and 38 mu W and attains an AP-to-tag range of 13 and 23 m for the fully-reflective and retro-reflective MIMO approaches, respectively.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据