植株对2.4GHz无线信号传播的衰减研究

Research on the Attenuation Characteristics of the 2.4GHz Wireless Signal Affected by Plant

无线传感器网络在大棚生产中的应用越来越广泛,因此对网络通信质量和可靠性提出更高的要求。在温室环境中,无线信号会因为植物的密集度、高度、距离而出现一定程度的衰减,影响网络性能。应用CC2430芯片测量不同条件下接收功率数据,研究植物障碍物与信号源之间的距离同2.4GHz信号衰减之间的关系,实验结果为节点有效部署和网络拓扑结构优化提供有力依据。

Wireless sensor network is applied to greenhouse agriculture more and more widely,and needs higher requirements on the quality and reliability of network communication.In greenhouse,the wireless signal decays with density,height and distance of middle plants,so it causes to recede the network performance.By measuring the power of receiving signal with CC2430 chip under different conditions,the relationship of attenuation of 2.4GHz signal and distance between the plant obstacles and the signal source were studied.The results can provide designing basement for efficient distribution of wireless nodes and optimization of network topology.