Channel Capacity and Lower Bound for Ambient Backscatter Communication Systems

被引：0

作者：

Zhao, Wenjing ^{[1
]}

Wang, Gongpu ^{[1
]}

Gao, Feifei ^{[2
]}

Zou, Yulong ^{[3
]}

Atapattu, Saman ^{[4
]}

机构：

[1] Beijing Jiaotong Univ, Sch Comp & Informat Technol, Beijing, Peoples R China

[2] Tsinghua Univ, Dept Automat, Beijing, Peoples R China

[3] Nanjing Univ Posts & Telecommun, Inst Signal Proc & Transmiss, Nanjing, Jiangsu, Peoples R China

[4] Univ Melbourne, Dept Elect & Elect Engn, Melbourne, Vic, Australia

来源：

2017 9TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS AND SIGNAL PROCESSING (WCSP) | 2017年

基金：

中国国家自然科学基金;

关键词：

Ambient backscatter; capacity; Gaussian variable; lower bound; mutual information;

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Ambient backscatter is an emerging technology that utilizes the surrounding radio frequency (RF) signals such as digital digital television (TV) broadcasting, cellular or Wireless-Fidelity (Wi-Fi) to enable batteryless devices to communicate with each other. One open problem for ambient backscatter is channel capacity. In this paper, we investigate the capacity problem of an ambient backscatter communication system with a passive tag and a reader. Based on the Gaussian channel model, we design a method to determine channel capacity for the ambient backscatter communication system. The channel capacity is the maximal value of the derived mutual information. Interestingly, we find that the capacity for the ambient backscatter communication system is obtained when the input signals are not equiprobable. Finally, numerical results are provided to corroborate our theoretical analysis.

引用

页数：6

共 13 条

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