The article presents an experimental platform, so called “RFID Waveformer,” dedicated to the study of waveform optimization in the radio frequency identification (RFID) context. It is a flexible solution that enables waveform design and their energetic performance evaluation in a ultra high frequency (UHF) RFID link following the ISO‐18000 GEN2 standard protocol. It consists of a reader emulated by a LabVIEW interface controlling radiofrequency laboratory instruments, which perform real time tag response detection. Its interconnection with MATLAB routines enables the design and the evaluation of arbitrarily shaped RFID waveforms. In this article, for illustration, three waveforms are tested with RFID Waveformer in a complex propagation environment: pulsed wave (PW) and time reversal (TR) modes compared to the traditional continuous wave (CW) mode. Experimental results show that both PW and TR modes improve the energetic efficiency of the forward link and so the RFID read range compared to CW mode. Furthermore, TR presents the optimal efficiency in complex propagation medium. The RFID Waveformer enables tag response detection in the three modes offering ease of use and repeatability of measurements. The RFID Waveformer being not limited to the scenario considered in this article, it is a versatile solution extendable to other contexts.

中文翻译：

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无源UHF RFID系统中波形优化的实验平台

本文介绍了一个实验平台，即所谓的“ RFID Waveformer”，专用于研究射频识别（RFID）上下文中的波形优化。它是一种灵活的解决方案，可以按照ISO-18000 GEN2标准协议在超高频（UHF）RFID链路中进行波形设计及其能量性能评估。它包含一个由LabVIEW接口模拟的读取器，该接口控制射频实验室仪器，该仪器执行实时标签响应检测。它与MATLAB例程的互连实现了任意形状的RFID波形的设计和评估。在本文中，为说明起见，在复杂的传播环境中使用RFID Waveformer测试了三种波形：与传统的连续波（CW）模式相比，脉冲波（PW）和时间反转（TR）模式。实验结果表明，PW和TR模式均可提高前向链路的能量效率，因此与CW模式相比，RFID读取范围更大。此外，TR代表了复杂传播介质中的最佳效率。RFID Waveformer能够以三种模式进行标签响应检测，从而提供易用性和测量的可重复性。RFID Waveformer不限于本文考虑的场景，它是一种可扩展到其他环境的通用解决方案。