Wireless sensors exploiting IEEE802.15.4a for precise timestamping

2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication Pub Date : 2010-10-25 DOI:10.1109/ISPCS.2010.5609782

C. M. D. Dominicis, P. Ferrari, A. Flammini, E. Sisinni

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引用次数: 12

Abstract

This paper deals with the application of the Chirp Spread Spectrum (CSS) modulation for the synchronization of wireless sensors. Chirp modulation is a well known technique for precise localization, originally developed for RADAR applications. When CSS is used for communication purposes, radio frequency pulses are modulated in order to convey also user data. This approach allows for robustness, thanks to processing gain deriving from pulse compression, and for high accuracy estimation of the Time of Arrival of frames. In this paper, the CSS properties have been exploited in order to arrange a robust timestamping mechanism for distributed wireless sensor networks. The proposed system is based on the CSS modulation of the IEEE802.15.4a. Since commercial transceivers do not have synchronization support, the paper is based on a CSS modulation module implemented using a software defined radio approach. The outcome is a highly flexible solution that offers the desired synchronization support, confirmed by the simulation results showing a packet timestamping capability well below one nanosecond.

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无线传感器利用ieee802.15.a精确的时间戳

本文讨论了啁啾扩频(CSS)调制在无线传感器同步中的应用。啁啾调制是一种众所周知的精确定位技术，最初是为雷达应用而开发的。当CSS用于通信目的时，无线电频率脉冲被调制以传送用户数据。这种方法考虑到鲁棒性，这要归功于脉冲压缩产生的处理增益，以及帧到达时间的高精度估计。本文利用CSS特性为分布式无线传感器网络安排了一个鲁棒的时间戳机制。该系统基于ieee802.15.a的CSS调制。由于商用收发器不具有同步支持，因此本文基于使用软件定义无线电方法实现的CSS调制模块。结果是一个高度灵活的解决方案，它提供了所需的同步支持，仿真结果显示数据包时间戳功能远低于1纳秒。

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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来源期刊

2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication

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