Research On Path Loss Of 2.4 GHz Wireless Sensor Network Signal In The Plantation Environment

Wireless sensor networks (WSN) technology has been widely used in forestry ecological monitoring field. It is a cutting-edge technology in current information industry, and can provide important technical means to achieve precision forestry. The problem of WSN nodes’deployment is a primary issue in the procedure of its promotion in forestry field. At the same time, the optimization of deployment of WSN nodes is closely related to the path transmission loss of WSN signal in the plantation. Thus, according to the attenuation mechanism of the WSN signal path transmission and the general processing of built wireless signal propagation models, the modeling idea behind was therefore determined, and the necessary transmission field strength attenuation was then estimated, and finally the prediction of WSN nodes’ maximum effective communication distance in the plantation environment was accomplished. The main research and achievements are as follows:1. Experiments of 2.4 GHz WSN signal path loss were performed in poplar plantation and the related datasets were collected and processed as well, which lays the foundation for the succeeding necessary estimation of intensity attenuation and the establishment of field strength prediction models using corresponding methods.2. Wavelet regression analysis model, support vector machine (SVM) model and BP neural network model were established in turn using field strength data, and therefore the prediction accuracies of models were compared. This creates the conditions for the prediction of WSN nodes’ maximum effective communication distance in the plantation environment.3. Through BP neural network WSN nodes’ maximum distance of effective communication in the plantation was predicted, providing that the theoretical support for the optimization deployment of WSN nodes in the plantation.In a word, path loss of 2.4 GHz wireless sensor network signal in the plantation was studied in this paper. Through the analysis of the poplar experimental data, the prediction of actual field strength in the plantation and WSN nodes’ maximum effective communication distance was realized with a certain degree of innovation.