Activation Distance and Capacity Analysis for Ambient Backscatter Communications with Sensitivity Constraint and Beamforming
Activation Distance and Capacity Analysis for Ambient Backscatter Communications with Sensitivity Constraint and Beamforming
中国通信(英文版)2024年21卷第11期 页码:257-266
作者机构:
1. 1Engineering Research Center of Network Management Technology for High Speed Railway of Ministry of Education, School of Computer and Information Technology, Beijing Jiaotong University,Beijing,China,100044
2. 2China Academy of Information and Communications Technology,Beijing,China,100191
3. 3School of Communication and Information Engineering, Chongqing University of Posts and Telemcommunications,Chongqing,China,400065
4. 4Shanghai Key Laboratory of Multidimensional Information Processing, Engineering Center of SHMEC for Space Information and GNSS, School of Information Science and Technology, East China Normal University,Shanghai,China,200241
Mu Yunping, Fan Dian, Wang Gongpu, Xu Yongjun, Kuang Lei. Activation Distance and Capacity Analysis for Ambient Backscatter Communications with Sensitivity Constraint and Beamforming. China Communications. 2024, 21(11): 257-266 https://doi.
org/10.23919/JCC.ja.2022-0729
Mu Yunping, Fan Dian, Wang Gongpu, Xu Yongjun, Kuang Lei. Activation Distance and Capacity Analysis for Ambient Backscatter Communications with Sensitivity Constraint and Beamforming. China Communications. 2024, 21(11): 257-266 https://doi.DOI: 10.23919/JCC.ja.2022-0729.
org/10.23919/JCC.ja.2022-0729DOI:
Activation Distance and Capacity Analysis for Ambient Backscatter Communications with Sensitivity Constraint and Beamforming
Circuit sensitivity of sensors or tags without battery is one practical constraint for ambient backscatter communication systems. This letter considers using beamforming to reduce the sensitivity constraint and evaluates the corresponding performance in terms of the tag activation distance and the system capacity. Specifically
we derive the activation probabilities of the tag in the case of single-antenna and multi-antenna transmitters. Besides
we obtain the capacity expressions for the ambient backscatter communication system with beamforming and illustrate the power allocation that maximizes the system capacity when the tag is activated. Finally
simulation results are provided to corroborate our proposed studies.