《橘园无线信号传输方式研究》-毕业论文.docVIP

摘 要 随着无线通信技术和电子信息技术的迅猛发展，传感器网络得到了快速的推广和应用，传感器被尝试用于精细农作业以采集农作物生长环境中的有用信息(如温湿度、土壤营养情况等)，然后通过无线网络(如General Packet Radio Service)或因特网传给管理人员，旨在于将高科技技术应用于精细农作业的生产与管理，让农作业的生产与管理更加科学与方便化。 本文根据实验室采用的无线传感器节点的相关物理特性，以及节点将要应用的实际环境(山地柑橘园)，进行了基于Matlab平台的无线通信系统仿真。并采用无线传感器节点在模拟的柑橘园场地进行了实际测量，记录了实验中不同节点高度、传输距离、植被深度以及植被宽度等实际情况下，节点信号的路径损耗和丢包率，并通过自行编写的VC++小工具对实验数据进行统计分析，最后将结果以图片的形式给出。 由于节点的实际应用环境地理位置复杂，且具有一定的狭义适用性，即往往某种传感器节点部署只适合某种特定应用类型的传感器网络，对其他类型来说不具备通用性。加之无线信号在信道中传输会遇到各种各样的干扰和损耗，且有许多情况是无法预知的，这让实际应用取得最佳节点部署制造了挑战。本文的贡献只是为节点的科学部署提供部分理论依据。 关键词：直接序列扩频 系统仿真 无线网络 Orange Groves Wireless Signal Transmission Research Chen XX (College of Engineering, South China Agricultural University, Guangzhou 510642, China) Abstract: Along with the rapidly development of wireless communication technology and electronic of information technology, sensor network obtained fast popularization and application, sensors is trying for fine farming to acquisition crops growth environment, the useful information (such as temperature and humidity, soil nutrient situation, etc), and then through the wireless network (such as General Packet Radio Service) or Internet Service to management personnel, aims to high-tech technology applied to fine farming production and management, make the production and management of farming more scientific and convinient. This paper based on the laboratory using wireless sensor node related physical properties, and the actual environment to application nodes (mountain citrus groves), has been made based on Matlab wireless communication system simulation. And USES the GAINS in simulation of citrus groves node area to an actual measurement, and records the experiments of different nodes height, the transmission distance, vegetation depth and vegetation width actual conditions, signal node path loss and packet loss rate, and through written by vc + + small tools on the experiment data of statistical analysis, finally will result in picture form are given. The actual applic