Performance Evaluation According to Distance Between Backscatter Tag and Receiver in WiFi Ambient Backscatter Communication Systems 


Vol. 46,  No. 10, pp. 1549-1556, Oct.  2021
10.7840/kics.2021.46.10.1549


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  Abstract

This paper presents the results of performance evaluation according to the communication distance in an ambient backscatter communication system (AmBC) that can transmit information using ultra-low power. First, an AmBC system consisting of an ambient signal transmitter, a backscatter tag, and a reader is designed. This system considers the symbol period of the tag, path loss by communication distance, and channel environment with additive white Gaussian noise (AWGN), phase rotation, and time delay. In particular, a differential encoding function is added to the tag to cope with the channel environment in which destructive interference occurs between the direct signal from the ambient signal transmitter and the backscattered signal. In the channel considering only AWGN and phase rotation, it is observed that the bit sent from the tag is inversely received in the reader, resulting in deterioration of performance. However, it is confirmed that this performance degradation can be effectively overcome through differential encoding. It is also confirmed that performance of the AmBC system is better when the transmission speed of the tag is lower and the symbol period is longer.

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  Cite this article

[IEEE Style]

C. An, H. M. Kwon, H. Ryu, "Performance Evaluation According to Distance Between Backscatter Tag and Receiver in WiFi Ambient Backscatter Communication Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 10, pp. 1549-1556, 2021. DOI: 10.7840/kics.2021.46.10.1549.

[ACM Style]

Changyoung An, Hyeong Min Kwon, and Heung-Gyoon Ryu. 2021. Performance Evaluation According to Distance Between Backscatter Tag and Receiver in WiFi Ambient Backscatter Communication Systems. The Journal of Korean Institute of Communications and Information Sciences, 46, 10, (2021), 1549-1556. DOI: 10.7840/kics.2021.46.10.1549.

[KICS Style]

Changyoung An, Hyeong Min Kwon, Heung-Gyoon Ryu, "Performance Evaluation According to Distance Between Backscatter Tag and Receiver in WiFi Ambient Backscatter Communication Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 10, pp. 1549-1556, 10. 2021. (https://doi.org/10.7840/kics.2021.46.10.1549)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880