频谱监测系统参数估计模块的设计与实现

发布时间：2018-05-27 02:14

本文选题：频谱监测 + 无线传感器网络　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：本文针对国家重大专项子项“频谱感知无线传感器网络关键技术研究”课题,基于无线传感器网络背景以及近年来在无线自组织网络技术基础上提出的一种新型分布式信息获取系统,设计并实现了基于无线传感器网络的电磁频谱监测软件系统。根据功能分析,我们将系统的整个结构划分为网络层、业务层、数据分发层、前端展示层四层结构,通过有效地面向对象的设计,从而使软件系统的结构更加清晰。文章主要从软件设计、算法实现、测试这三个方面介绍了“基于无线传感器网络的电磁频谱监测系统”参数估计模块的设计与实现。第一章绪论部分,我们主要介绍了“基于无线传感器网络的电磁频谱监测系统”课题的来源、研究意义以及国内外在该方面的研究现状。紧接着我们介绍了电磁频谱监测系统的网络层体系结构,其中主要包括需求分析、网络拓扑结构选择、IO模型选择、软件协议设计等网络层核心技术。为了开发出稳定、高效的网络层,我们使用、参考了libevent和memcached开源软件的基本设计技巧与思想。在上述网络架构的基础上我们介绍了上层软件架构设计,其中主要包括观察者模式、心跳机制、数据协议设计、组包等核心技术。接下来我们介绍了中心频率估计、码元速率估计、信号类型识别这三大核心技术理论以及工程实现。在完成上述功能的基础上我们从硬件环境、网络连接、节点布局等方面介绍了软件系统的测试过程,并且给出了具体的测试结果。最后总结与展望部分主要介绍了目前我们软件系统所取得的主要成果以及目前亟待解决的问题。通过以上内容,我们详细介绍了“基于无线传感器网络的电磁频谱监测系统”参数估计模块的主要理论和软件方面的核心技术。通过大量的实际测试,我们的整个软件系统以及算法性能达到了项目对信号检测与识别部分的要求,部分性能甚至远远超过了国家的要求。
[Abstract]:This paper aims at the research of the key technology of spectrum sensing wireless sensor networks. A new distributed information acquisition system based on wireless sensor network background and wireless ad hoc network technology is proposed in this paper. The electromagnetic spectrum monitoring software system based on wireless sensor network is designed and implemented. According to the function analysis, the whole structure of the system is divided into four layers: network layer, business layer, data distribution layer and front-end display layer. Through the effective object-oriented design, the structure of the software system is made clearer. This paper mainly introduces the design and implementation of the parameter estimation module of electromagnetic spectrum monitoring system based on wireless sensor network from three aspects: software design, algorithm realization and test. In the first chapter, we mainly introduce the source of the topic of electromagnetic spectrum monitoring system based on wireless sensor network, the significance of the research and the current situation of the research at home and abroad. Then we introduce the network layer architecture of electromagnetic spectrum monitoring system, which mainly includes requirements analysis, network topology selection and IO model selection, software protocol design and other network layer core technologies. In order to develop a stable and efficient network layer, we use, referring to the basic design techniques and ideas of libevent and memcached open source software. On the basis of the above network architecture, we introduce the upper layer software architecture design, which mainly includes observer mode, heartbeat mechanism, data protocol design, packet formation and other core technologies. Then we introduce the core technology theory of center frequency estimation, symbol rate estimation and signal type recognition, as well as the engineering implementation. On the basis of the above functions, we introduce the testing process of the software system from the aspects of hardware environment, network connection, node layout and so on, and give the concrete test results. In the last part, the main achievements of our software system and the problems to be solved are introduced. Through the above contents, we introduce in detail the main theory of the parameter estimation module of "electromagnetic spectrum monitoring system based on wireless sensor network" and the core technology of software. Through a large number of practical tests, our entire software system and algorithm performance meet the project requirements for signal detection and recognition, some of the performance even far exceeded the requirements of the country.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM935.21

【共引文献】