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首页> 外文期刊>IEEE Transactions on Intelligent Transportation Systems >Subsampling OFDM-Based Ultrasonic Data Communication Through Metallic Channels for Monitoring of Cargo Containers
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Subsampling OFDM-Based Ultrasonic Data Communication Through Metallic Channels for Monitoring of Cargo Containers

机译：通过金属通道对基于OFDM的超声数据进行二次采样以监控货运集装箱

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摘要

An enhanced ultrasonic communication system based on piezoelectric transducers for monitoring of goods in cargo containers is presented. The proposed system consists of several sensors placed inside the container whose data are collected and transmitted outside of it. Data transmission is carried out by an ultrasonic communication channel in order to avoid drilling the wall of the container. The proposed data communication system is based on the transmission of a 128-OFDM signal. This modulation has been chosen due to its robustness to channels with frequency-selective fading and its spectrum efficiency. In order to increase the signal bandwidth and to reduce the power consumption at the internal node (transmitter), the proposed system exploits the non-linearity of the metallic channel to transmit at higher resonance frequencies. Moreover, power consumption at the external node (receiver) is reduced by using a subsampling-based receiver, which allows its implementation through low-cost electronics.
机译：提出了一种基于压电换能器的增强型超声通信系统，用于监控集装箱中的货物。拟议的系统由放置在容器内部的多个传感器组成，这些传感器的数据被收集并传输到容器外部。为了避免在容器壁上钻孔，通过超声波通信通道进行数据传输。所提出的数据通信系统基于128-OFDM信号的传输。之所以选择这种调制方式，是因为其对具有选频衰落功能的信道的鲁棒性及其频谱效率。为了增加信号带宽并减少内部节点（发送器）的功耗，所提出的系统利用金属通道的非线性在更高的谐振频率下进行发送。此外，通过使用基于子采样的接收器，可以减少外部节点（接收器）的功耗，从而可以通过低成本电子设备来实现。

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