Journal ArticleDOI
Exploring LoRa for Sensing
Fusang Zhang,Zhaoxin Chang,Jie Xiong,Daqing Zhang +3 more
- Vol. 25, Iss: 2, pp 33-37
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TLDR
In this paper, the authors summarized the sensing range of existing wireless technologies and showed that long-range through-wall sensing is still missing with wireless sensing, which is a limitation of traditional wireless sensing.Abstract:
Wireless sensing received a great amount of attention in recent years and various wireless technologies have been exploited for sensing, including WiFi [1], RFID [2], ultrasound [3], 60 GHz mmWave [4] and visible light [5]. The key advantage of wireless sensing over traditional sensing is that the target does not need to be equipped with any sensor(s) and the wireless signal itself is being used for sensing. Exciting new applications have been enabled, such as passive localization [6] and contactless human activity sensing [7]. While promising in many aspects, one key limitation of current wireless sensing techniques is the very small sensing range. This is because while both direct path and reflection path signals are used for communication, only the weak target-reflection signals can be used for sensing. Take Wi-Fi as an example: the communication range can reach 20 to 50 meters indoors but its sensing range is merely 4 to 8 meters. This small range further limits the through-wall sensing capability of Wi-Fi. On the other hand, many applications do require long-range and through-wall sensing capability. In a fire rescue scenario, the sensing device cannot be placed close to the building, and the long-range through-wall sensing capabilities are critical for detecting people deep inside the building. Table I summarizes the sensing range of existing wireless technologies. We can see that long-range through-wall sensing is still missing with wireless sensing.read more
Citations
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Journal ArticleDOI
LoRaWAN Technology in Irrigation Channels in Batu Indonesia
Puput Dani Prasetyo Adi,Akiomi Kitagawa,Dwi Arman Prasetya,Rahman Arifuddin,Stanislaus Yoseph +4 more
TL;DR: In this article , a case study of river water quality that enters agricultural land or irrigation in Temas, Batu City, where the river water has been contaminated by household waste is presented.
Journal ArticleDOI
Human Sensing by Using Radio Frequency Signals: A Survey on Occupancy and Activity Detection
TL;DR: In this paper , the underlying principles, methodologies, and system architectures of radio-frequency-based occupancy detection systems are reviewed and discussed, in addition to focusing on the security aspects of occupancy detection and discussing future trends and difficulties.
Proceedings ArticleDOI
MaLoRaGW: Multi-User MIMO Transmission for LoRa
TL;DR: MaLoRaGW as discussed by the authors is the first multi-antenna LoRa Gateway that enables multi-user MIMO (MU-MIMO) LoRa communications in both uplink and downlink.
Proceedings ArticleDOI
MaLoRaGW
TL;DR: MaLoRaGW as mentioned in this paper is the first multi-antenna LoRa Gateway that enables multi-user MIMO (MU-MIMO) LoRa communications in both uplink and downlink.
Proceedings ArticleDOI
Performance Evaluation of LoRaWAN in Pulse Status Monitoring with Clustering of Wireless Sensor Network
Puput Dani Prasetyo Adi,Iwan Purnama,Agoestina Mappadang,Budi Agung Sudarmanto,Latifa Nuraini,Fauzan Azim,Muhammad Yusuf Siregar,Budianto Bangun,Yudi Prastiyono,Zulkifli +9 more
TL;DR: In this article , the authors analyze the possibility of clustering LoRaWAN end-nodes and how best is the most suitable or effective clustering method to build LoRa-WAN technology.
References
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Proceedings ArticleDOI
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TL;DR: TagScan is a system that can identify the material type and image the horizontal cut of a target simultaneously with cheap commercial off the-shelf RFID devices and is able to achieve higher than 94% material identification accuracies for 10 liquids.
Journal ArticleDOI
FullBreathe: Full Human Respiration Detection Exploiting Complementarity of CSI Phase and Amplitude of WiFi Signals
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