Low Complexity Burst Packet Detection for Wireless-Powered UWB RFID Systems

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-11-12 DOI:10.1109/ICUWB.2015.7324469

Qin Zhou, Z. Zou, Qiang Chen, H. Tenhunen, Lirong Zheng

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引用次数: 3

Abstract

This paper addresses the issue of UWB signal acquisition in the context of wireless powered UWB RFID systems. In this scenario, the data transmission is based on short packet so as to meet the micro-power budget of autonomous power harvesting. The burst short packet transmission as well as the low duty cycling UWB pulse modulation places a stringent challenge at the UWB receiver for timing acquisition and packet detection. Besides, in a positioning enabled RFID system where variable signal-to-noise ratio (SNR) due to the variable link distance and noise background is unavoidable, conventional packet detection schemes rely on predefined threshold can hardly achieve good performance. In this study, we propose a low complexity method for burst packet detection. It is performed by sensing the preamble signal characteristic instead of the received signal strength, and thus bypassing the necessity of detection threshold. The validity of the proposed approach and its adaptivity to SNR variations is demonstrated by simulation results as well as field test with a UWB software defined radio (SDR) platform.

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无线供电UWB RFID系统的低复杂度突发数据包检测

本文讨论了在无线供电的UWB RFID系统背景下的UWB信号采集问题。在这种情况下，数据传输以短包为基础，以满足自主电力采集的微功率预算。突发短包传输以及低占空比UWB脉冲调制对UWB接收机的定时采集和包检测提出了严格的挑战。此外，在具有定位功能的RFID系统中，由于链路距离的变化和噪声背景不可避免地会导致信噪比(SNR)的变化，传统的依赖于预定义阈值的数据包检测方案很难获得良好的性能。在这项研究中，我们提出了一种低复杂度的突发数据包检测方法。它通过感知前置信号的特性而不是接收到的信号强度来实现，从而绕过了检测阈值的必要性。仿真结果和超宽带软件定义无线电(SDR)平台的现场测试验证了该方法的有效性和对信噪比变化的适应性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

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