无线频谱监测网络嵌入式系统移植与开发

发布时间：2018-05-03 18:49

本文选题：无线频谱监测 + 嵌入式　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：无线频谱监测是对无线频谱这种有限的、不可再生的资源进行监测,为频谱管理提供信息,保障频谱资源得到充分和有序利用。随着无线技术的发展,现有的频谱监测系统已无法适应当前背景下的频谱监测需求。无线传感器网络是近年来迅速发展的一种基于无线自组织网络、结合传感器技术的分布式新型数据收集系统。鉴于其低成本、低功耗、分布式以及网络自组织的特点,若能融合无线传感器网络技术,建立一种新的无线分布式频谱监测系统,将彻底克服传统频谱监测系统的种种弊端,适应无线频谱监测的新需求。这种新的无线频谱监测系统不仅需要完成频谱数据的收集和处理,还要具有极强的网络特性,能够快速地组建网络并及时将数据传送至服务器。这样的功能必须依靠嵌入式系统来实现,而如何为该频谱监测系统移植和开发一套合适的嵌入式系统是一个非常值得研究的问题。本文对现有无线频谱监测系统的局限性以及无线传感器网络的特点进行了分析,研究了将无线传感器网络与频谱监测相结合所需要解决的技术问题,并据此设计了基于无线传感器网络的新型无线频谱监测系统的网络架构以及频谱感知节点的业务功能。根据功能需求,以AT91SAM9G45微处理器为数字控制中心,配合信号接收通道和网络通信模块组成感知节点平台。该平台搭载Linux 2.6.30内核搭建ARM-Linux嵌入式系统,在操作系统控制下,频谱数据由通道单元接收无线频谱信号产生,经FPGA芯片进行初步处理,最后经网络单元发送至任务管理中心。文章重点描述了Linux嵌入式系统底层相关移植工作,包括Bootloader、文件系统和Linux内核的移植,另外还详细介绍了系统所需要的FPGA、Watchdog驱动的开发。
[Abstract]:Wireless spectrum monitoring is a limited, non renewable resource monitoring for wireless spectrum, providing information for spectrum management, ensuring full and orderly use of spectrum resources. With the development of wireless technology, the existing spectrum monitoring system has been unable to adapt to the current background of spectrum monitoring requirements. Wireless sensor networks are in recent years A new distributed data collection system based on wireless self organizing network and sensor technology is rapidly developed. In view of its low cost, low power consumption, distribution and self-organization, a new wireless distributed spectrum monitoring system can be built up to overcome the traditional spectrum if the wireless sensor network technology can be fused. This new wireless spectrum monitoring system needs not only the collection and processing of the spectrum data, but also the very strong network characteristics, which can quickly form the network and transmit the data to the server. This function must rely on the embedded system to implement the system. And how to transplant and develop a suitable embedded system for the spectrum monitoring system is a very worthwhile problem. This paper analyzes the limitations of the existing wireless spectrum monitoring system and the characteristics of the wireless sensor network, and studies the technology to solve the combination of the wireless sensor network and the spectrum monitoring. The network architecture of a new wireless spectrum monitoring system based on wireless sensor network and the service function of the spectrum sensing node are designed accordingly. According to the functional requirements, the AT91SAM9G45 microprocessor is used as the digital control center, and the sensing node platform is composed of the signal receiving channel and the network communication module. This platform carries the Linu The X 2.6.30 kernel builds the ARM-Linux embedded system. Under the control of the operating system, the spectrum data is generated by the wireless spectrum signal from the channel unit. It is processed by the FPGA chip and sent to the task management center through the network unit. The article focuses on the underlying related transplantation of the Linux embedded system, including the Bootloader and the files. The transplant of the system and Linux kernel, and the development of FPGA and Watchdog driver required by the system are also introduced in detail.

【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

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