Ambient Backscatter Communication Systems: Capacity and Outage Performance Analysis

IEEE Access

卷:6

Wenjing Zhao¹  Gongpu Wang¹  Saman Atapattu²  Li-Sheng Fan³  Rongfei Fan⁴ 

[1] Beijing Key Lab of Transportation Data Analysis and Mining, School of Computer and Information Technology, Beijing Jiaotong University, Beijing, China;

[2] Department of Electrical and Electronic Engineering, The University of Melbourne, Melbourne, VIC, Australia;

[3] School of Computer Science and Educational Software, Guangzhou University, Guangzhou, China;

[4] School of Information and Electronics, Beijing Institute of Technology, Beijing, China;

关键词: Ambient backscatter;    channel capacity;    Gaussian variable;    Internet of Things;    outage probability;    performance analysis;   

DOI  :  10.1109/ACCESS.2018.2828021

来源: DOAJ

【 摘 要 】

Ambient backscatter is an emerging green communication technology that exploits the environmental radio frequency (RF) signals to enable passive devices to communicate with each other. This paper investigates channel capacity and outage performance of ambient backscatter communication systems. Specifically, a calculation method is proposed to facilitate capacity analysis, and the ambient backscatter system capacities are derived in the case of four different RF signals. It is surprisingly found that the channel capacity is obtained when the RF signals are not equiprobably backscattered by tag, and that the capacity with complex Gaussian RF signals is not exactly twice that with real ones for the ambient backscatter communication systems. Then, the outage probability and its asymptotic value in the high signal-to-noise ratio regime are obtained. Since the exact outage expression consists of an infinite number of terms, a tight truncation error bound is derived to reasonably estimate the number of effective terms for numerical simulation. Finally, simulation results are provided to corroborate theoretical analysis.

【 授权许可】

Unknown