TVWS频段的SPM模型海上传播校正研究

发布时间：2018-04-23 19:08

本文选题：电视白频谱 + 标准传播模型　；参考：《海南大学》2016年硕士论文

【摘要】：随着南海海上开发的逐步发展,海上旅游业、海洋渔业和勘探行业的快速发展,海上无线通信的发展显得愈发重要,目前海上现有的窄带集群通信系统传输效率低,而现有的卫星系统费用很高,无法满足现今海上作业、搜救对于海洋通信高速率大容量的需求,因此急需发展海上宽带通信技术,电视白频谱(TVWS)因其电磁传播特性,传播距离远,相对带宽较宽等优点,可以用于海上通信组网,提高网络性能,因此建设海上宽带通信网络选择TVWS频段,在网络规划的过程中,准确的传播模型是合理进行网络规划的基础。本文在进行环海南岛近海海域TVWS频谱占用度测量与分析的基础上,对海面无线传播环境特点进行分析,研究对比了多种传播模型的适用性,选用标准传播模型(SPM)作为海上网络规划建设的传播模型。SPM模型主要是为陆地电磁传播环境开发的,为了验证SPM模型在海上传播的实用性,本文还选取两个地点进行了海上CW测试(连续波测试),并利用该实测数据,用两种方法对实测数据进行了传播模型校正研究：一是利用Matlab编写的图形用户界面进行模型参数的手动校正,二是利用网络规划软件Atoll结合测量地三维电子地图实现传播模型校正,最后通过校正准则验证,两种方法校正的传播模型均适用于海面传播环境。
[Abstract]:With the gradual development of maritime development in the South China Sea and the rapid development of marine tourism, marine fishery and exploration industry, the development of maritime wireless communication becomes more and more important. At present, the transmission efficiency of the existing narrowband trunked communication system at sea is low. However, the existing satellite systems are very expensive and can not meet the needs of today's offshore operations. Search and rescue needs high speed and large capacity for ocean communications. Therefore, it is urgent to develop offshore broadband communication technology, and TV white spectrum TVWSs have their electromagnetic propagation characteristics. Because of the advantages of long propagation distance and wide relative bandwidth, it can be used in the offshore communication network to improve the network performance. Therefore, the construction of the offshore broadband communication network selects the TVWS frequency band, and in the process of network planning, Accurate propagation model is the basis of network planning. Based on the measurement and analysis of the TVWS spectrum occupancy in the offshore waters around Hainan Island, this paper analyzes the characteristics of the sea surface wireless propagation environment, and studies and compares the applicability of various propagation models. In order to verify the practicability of SPM model at sea, the standard propagation model (SPM) is selected as the propagation model of marine network planning and construction. The model is mainly developed for the terrestrial electromagnetic propagation environment. In this paper, the CW measurements (continuous wave measurements) are carried out at two locations, and the measured data are used. Two methods are used to study the propagation model correction of the measured data. One is the manual correction of the model parameters based on the graphical user interface written by Matlab. Second, the propagation model correction is realized by using the network planning software Atoll combined with the geodesic 3D electronic map. Finally, the calibration criteria verify that the two methods are applicable to the sea surface propagation environment.
【学位授予单位】：海南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN92

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