An opportunistic sensor network approach to wide area environmental sensing

A. Cardellicchio, Giuseppe Dentamaro, V. Di Lecce, C. Guaragnella, M. Rizzi
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引用次数: 1

Abstract

As the availability of frequency spectrum is constantly being reduced by the growing diffusion of portable applications, the need for high speed and low power wireless transmissions of large amounts of data has become a challenging topic, especially in scenarios like geographically spread environmental sensor networks. To deal with this, opportunistic transmission approaches, i.e. methods which leverage on spectrum sensing techniques to transfer data without the need for pre-assigned frequency slots, can be exploited; however, these methods often require computationally expensive spectrum estimation techniques, which may be unsuitable for low power devices. In this work, a spectrum sensing method which uses a simple and efficient chirp-based demodulation approach is presented: this technique allows preservation of both time and frequency resolution in spectrum estimation, while reducing computational load on sensor nodes, therefore making the deployment of an opportunistic environmental sensor network feasible.
广域环境传感的机会传感器网络方法
随着便携式应用的日益普及,频谱的可用性不断减少,对大量数据的高速低功耗无线传输的需求已经成为一个具有挑战性的话题,特别是在地理分布的环境传感器网络等场景中。为了解决这个问题,可以利用机会传输方法,即利用频谱传感技术传输数据而无需预先分配频率槽的方法;然而,这些方法通常需要计算昂贵的频谱估计技术,这可能不适合低功率器件。在这项工作中,提出了一种使用简单有效的基于啁啾的解调方法的频谱感知方法:该技术允许在频谱估计中保留时间和频率分辨率,同时减少传感器节点的计算负荷,因此使得机会环境传感器网络的部署可行。
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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