短波通信天线系统移相特性及相位检测技术的研究

发布时间：2018-10-19 14:01

【摘要】：随着无线通信技术的发展,其应用也越来越广泛,除民用外也逐渐涉及国防军事等领域,所以天线系统对功率有了更高的要求。短波通信的过程中,经常需要采用一定的反干扰手段来保证通信质量,最常用的是空间功率合成技术,高精度的相位差则是其中的重要指标。本文针对天线阵信号,对移相信号进行高精度检测并进行信号质量分析,主要完成工作有:1.针对采用主流相位检测方法的缺陷,对网络化天线阵列系统中移相特性及相位检测技术进行深入的研究分析与验证,采用荷兰TiePie HS5-530数据采集计算与AD8302硬件相位差检测电路相结合的方式实现系统功能。相位差硬件检测电路将相位差信息转换为电平信息,然后通过串口通信将结果传送到上位机,最后上位机将采样数据处理结果与硬件检测结果统一进行曲线拟合处理得出所需相位差结果。2.实现硬件平台搭建,主要工作包括工控机的定制与内部各功能模块的连接布局、数据采样模块的特点及开发需求、硬件相位差检测电路,确定硬件系统的整体框架,最终完成对硬件系统的整体设计。3.在数据处理的过程中系统主要完成对天线射频信号的采样与分析处理,包括FFT、波形还原、频谱分析、相位差检测、结果显示等功能;实现移相特性采样分析的自动化,同时得到多路信号间相位差的高精度结果(±1°)。另外在程序的结果显示界面,本文实现了信号波形还原和频谱显示功能。同时对信号质量分析结果显示在相应区域,包括信号频率、幅度、驻波比和信号间的相位差等;另外还有信息提示区实时反映系统的运行状态。在实现上述功能的前提下,扩展了远程控制功能;用户可以在远端通过IE登录控制系统的功能实现,并将结果数据通过TCP/IP通信协议接收并存储。4.在整个系统设计完成后,根据项目指标要求,通过一系列例行试验对系统整体进行测试,将各组试验数据结果进行精度分析,结果表明在初步测试的过程中本系统在各种模拟恶劣环境中都能够满足指标要求。最后对本系统的远程通信功能进行验证测试,在IE端能够通过网络化天线控制平台远程操控程序的执行,可知本系统的网络化功能也能够满足要求。但是,本文所设计的系统也存在不足之处。首先数据库系统设计不够完善,对数据的存储管理功能有待提高;另外程序执行界面视觉效果也需要进一步美化。
[Abstract]:With the development of wireless communication technology, its application is more and more extensive. Besides civil affairs, it is also gradually involved in the field of national defense and military affairs, so the antenna system has higher requirements for power. In the process of shortwave communication, some anti-interference means are often used to ensure the communication quality. The most commonly used technology is the space power synthesis technology, and the high precision phase difference is one of the important indexes. In this paper, the phase shift signal is detected with high precision and the signal quality is analyzed. The main work is as follows: 1. Aiming at the defects of the mainstream phase detection method, the phase shift characteristics and phase detection techniques in networked antenna array systems are studied and verified. The system functions are realized by combining Dutch TiePie HS5-530 data acquisition and AD8302 hardware phase difference detection circuit. The phase difference information is converted into the level information by the hardware detecting circuit of phase difference, and the result is transmitted to the upper computer through serial communication. Finally, the data processing result of sampling and the result of hardware testing are unified by the upper computer to get the desired phase difference result by curve fitting. 2. The main work includes the customization of the industrial computer and the connection layout of the internal functional modules, the characteristics and development requirements of the data sampling module, the hardware phase difference detection circuit, and the overall frame of the hardware system. The final completion of the hardware system of the overall design. 3. In the process of data processing, the system mainly completes the sampling and processing of antenna RF signals, including the functions of FFT, waveform reduction, spectrum analysis, phase difference detection, result display, etc. At the same time, the high accuracy results of phase difference between multichannel signals are obtained (卤1 掳). In addition, in the result display interface of the program, this paper realizes the function of signal waveform restoration and spectrum display. At the same time, the results of signal quality analysis are shown in the corresponding regions, including signal frequency, amplitude, standing wave ratio and phase difference between signals, and there are also information warning areas to reflect the running state of the system in real time. On the premise of realizing the above functions, the remote control function is extended, the user can realize the function of the remote access control system through IE, and the result data is received and stored through the TCP/IP communication protocol. 4. After the design of the whole system is finished, according to the requirements of the project index, the whole system is tested through a series of routine tests, and the accuracy of the results of each group of test data is analyzed. The results show that the system can meet the requirements in various simulation environments. Finally, the remote communication function of the system is verified and tested. The remote control program of the platform can be controlled by the network antenna in the IE terminal, and the network function of the system can also meet the requirements. However, the system designed in this paper also has shortcomings. First, the design of database system is not perfect, and the function of data storage and management needs to be improved. In addition, the visual effect of program execution interface also needs to be further beautified.
【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】：TN828

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