近水面2．4GHz信号传播损耗模型的校正研究

摘要

无线传感器网络的性能很大程度上受限于无线信道的特性。随着物联网事业飞速发展，近水面环境下2．4GHz信号传播路径损耗模型的研究已成为无线传感器网络研究的重要课题之一。在近水面的环境下，针对基于IEEE802．15．4标准的2．4GHz信号传播特性进行了实测研究，并利用最小二乘法对双射线模型进行拟合分析得到经验公式。研究结果表明：校正后的经验公式更符合实际环境中的信号传播路径损耗特点，这也为未来大规模铺设近水面无线传感器网络提供理论指导作用。%The performance of wireless sensor network is largely limited by the wireless channel characteristics. With the rapid development of the Internet of Things industry of China,2.4 GHz signal propagation path loss model in overwater environment has become an important issue for wireless sensor network. The paper collects the measurement data about 2.4 GHz signal propagation characteristics based on IEEE802.15.4 standard in overwater environment ,and uses the least square method to fit the two-ray model and finally determine the empiri- cal formula. The result shows that the corrected empirical formula conforms more with the signal propagation path loss characteristics in the actual environment,which provides theoretical guidance for laying large-scale overwater wireless sensor networks in the future.