WiFi反向散射用于绿色物联网：概念、研究趋势与实际挑战
WiFi Backscatter for Green Internet of Things: Concepts, Research Trends, and Practical Challenges
AI总结：
本文综述WiFi反向散射在绿色物联网中的应用，涵盖基本原理、使能技术、研究趋势及实际部署挑战，旨在推动其成为实用通信技术。
AI中文摘要：
WiFi反向散射已成为一种有前景的绿色物联网（IoT）连接技术，它使无电池设备能够通过广泛可用的WiFi信号进行通信。尽管近年来取得了实质性进展，但研究原型与实际部署之间仍存在相当大的差距。本文从实际和绿色物联网系统的角度对WiFi反向散射进行了概述。我们首先介绍了基本原理和关键使能技术，以及潜在的物联网应用。然后，我们概述了近期研究趋势，这些趋势指向更高的吞吐量、并发通信、简化部署、商业兼容性以及通信与感知的联合。此外，我们指出了仍然阻碍实际部署的关键挑战，例如有限的发射器到标签的工作范围以及频移反向散射中的丢包问题。我们相信，解决这些挑战对于使WiFi反向散射成为未来绿色物联网系统的实用通信技术至关重要。
英文摘要：
WiFi backscatter has emerged as a promising technology for green Internet of Things (IoT) connectivity by enabling battery-free devices to communicate through widely available WiFi signals. Despite substantial progress in recent years, a considerable gap remains between research prototypes and practical deployment. This paper provides an overview of WiFi backscatter from the perspective of practical and green IoT systems. We first introduce the fundamentals and key enabling techniques, together with potential IoT applications. We then outline recent research trends toward higher throughput, concurrent communication, simplified deployment, commercial compatibility, and joint communication and sensing. Furthermore, we identify the key challenges that still hinder practical deployment, such as limited transmitter-to-tag operating range and packet loss in frequency-shifted backscatter. We believe that addressing these challenges will be critical to enabling WiFi backscatter to become a practical communication technology for future green IoT systems.
