基于LoRa测距的tdoa精确定位的理论与实践评价

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-03-03 DOI:10.1109/LCOMM.2025.3547036

Salma Elsherif;Karim Tarek;Phoebe Edward;Tallal Elshabrawy

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引用次数: 0

摘要

传统的物联网（IoT）技术，如RFID、蓝牙和Wi-Fi，在能源效率和通信范围之间做出了妥协。远程（LoRa）技术的核心是保证10年以上的电池寿命，同时保证10公里范围内的可靠通信。这些功能显示了LoRa的独特潜力，可以扩展大量基于本地化的物联网用例。这封信评估了基于lora的距离测距的理论和实践能力，这是基于到达时差（TDoA）的定位的基本组成部分。本文首先推导了LoRa信号测距的理论crmer - rao下界（CRLB）。然后开发了一个仿真模型，该模型结合了实际接收方面，如频偏估计误差。将仿真得到的距离误差与理论边界进行了比较，并对频率偏移的影响进行了评估。此外，设计了一个实验性的软件定义无线电（SDR）装置，用于在信噪比（SNR）值范围内实际评估距离范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Theoretical and Practical Evaluation of LoRa-Based Ranging Toward Accurate TDoA-Based LoRa Localization

Conventional Internet of Things (IoT) technologies such as RFID, Bluetooth, and Wi-Fi exhibit compromise between energy-efficiency and communication range. Long Range (LoRa) technology is pillared on guaranteeing battery lifetimes for up to ten years while promising reliable communication at the scale of ten kilometers. Such capabilities exhibit an exclusive potential of LoRa to proliferate a vast set of localization-based IoT use cases. This letter evaluates the theoretical and practical capabilities of LoRa-based distance ranging which is a fundamental constituent of Time Difference of Arrival (TDoA)-based localization. The letter first derives the theoretical Cramer-Rao Lower Bound (CRLB) for ranging of LoRa signals. A simulation model is then developed that incorporates practical reception aspects such as frequency offset estimation errors. The distance errors attained from simulations are compared against the theoretical bounds and the impact of frequency offsets is evaluated. Furthermore, an experimental Software Defined Radio (SDR) setup is devised for practical evaluation of distance ranging over a span of Signal-to-Noise Ratio (SNR) values.

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.