Wirelessly Powered Backscatter Communications: Waveform Design and SNR-Energy Tradeoff

被引：40

作者：

Clerckx, Bruno ^{[1
]}

Zawawi, Zati Bayani ^{[1
]}

Huang, Kaibin ^{[2
]}

机构：

[1] Imperial Coll London, Dept Elect & Elect Engn, London SW7 2AZ, England

[2] Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Hong Kong, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2017年 / 21卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

Backscatter communications; waveform design; SNR-energy tradeoff; wireless power transfer;

D O I：

10.1109/LCOMM.2017.2716341

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This letter shows that wirelessly powered backscatter communications is subject to a fundamental tradeoff between the harvested energy at the tag and the reliability of the backscatter communication, measured in terms of SNR at the reader. Assuming the RF transmit signal is a multisine waveform adaptive to the channel state information, we derive a systematic approach to optimize the transmit waveform weights (amplitudes and phases) in order to enlarge as much as possible the SNR-energy region. Performance evaluations confirm the significant benefits of using multiple frequency components in the adaptive transmit multisine waveform to exploit the nonlinearity of the rectifier and a frequency diversity gain.

引用

页码：2234 / 2237

页数：4

共 13 条

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