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Link Budget and Enhanced Communication Distance for Ambient Internet of Things

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Backscatter communications will play an important role in connecting everything for beyond 5G(B5G)and 6G systems.One open challenge for backscatter communications is that the signals suffer a round-trip path loss so that the communication distance is short.In this paper,we first calculate the communication distance upper bounds for both uplink and downlink by measuring the tag sensitivity and reflec-tion coefficient.It is found that the activation voltage of the envelope detection diode of the downlink tag is the main factor limiting the back-scatter communication distance.Based on this analysis,we then propose to implement a low-noise amplifier(LNA)module before the enve-lope detection at the tag to enhance the incident signal strength.Our experimental results on the hardware platform show that our method can increase the downlink communication range by nearly 20 m.

ambient IoT(AIoT)B5Gbackscatter communicationlink budgetlow-noise amplifier(LNA)Release 19tag chip sensitivityupper bounds

YANG Yibing、LIU Ming、XU Rongtao、WANG Gongpu、GONG Wei

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School of Computer and Information Technology,Beijing Jiaotong University,Beijing 100044,China

School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China

School of Computer Science and Technology,University of Science and Technology of China,Hefei 230026,China

国家自然科学基金国家自然科学基金北京市自然科学基金

61971029U22B2004L222002

2024

10.12142/ZTECOM.202401003

中兴通讯技术(英文版)
中兴通讯股份有限公司,安徽省科技情报研究所

中兴通讯技术(英文版)

影响因子：0.036
ISSN：1673-5188
年,卷(期)：2024.22(1)
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