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Signal Detection for Ambient Backscatter Communication with OFDM Carriers

机译:使用OFDM载波进行环境反向散射通信的信号检测

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摘要

Ambient backscatter communication (AmBC) is considered as a promising future emerging technology. Several works on AmBC have been proposed thanks to its convenience and low cost property. This paper focuses on finding the optimal energy detector at the receiver side and estimating the corresponding bit error rate for the communication system utilizing the AmBC. Through theoretical and numerical analyses, we present two important results. First, we improve the existing energy detector by calculating the optimal averaging power orders. Second, we take advantage of the early work on orthogonal frequency division multiplexing (OFDM), where the repeating structure of ambient OFDM signals is exploited to cancel out the direct-link interference by using a cyclic prefix, then provide a test statistic in which optimal detection threshold and optimal power order are derived accordingly. The study reveals the inherent limitation of AmBC energy detectors and provides a guidance for achieving optimal power order for a given significance level.
机译:环境背向散射通信(AmBC)被认为是一种有前途的未来新兴技术。由于其便利性和低成本特性,已经提出了一些有关AmBC的作品。本文着重于在接收器端找到最佳能量检测器,并估计利用AmBC的通信系统的相应误码率。通过理论和数值分析,我们提出了两个重要的结果。首先,我们通过计算最佳平均功率阶数来改进现有的能量检测器。其次,我们利用了正交频分复用(OFDM)的早期工作,其中利用环境OFDM信号的重复结构通过使用循环前缀来消除直接链路干扰,然后提供一种测试统计,其中最优相应地得出检测阈值和最佳功率阶数。该研究揭示了AmBC能量检测器的固有局限性,并为在给定的显着性水平下实现最佳功率阶数提供了指导。

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