无线电监测系统关键技术研究

发布时间：2018-08-07 06:55

【摘要】：无线电技术是21世纪发展非常迅速的技术之一,而无线电监测在无线电技术中扮演着至关重要的作用。无线电监测的主要内容是对无线电信号进行分析识别和参数测量,主要目的是进行目标测向和定位工作,从而获得信号的有效信息,对无线电频谱资源进行相应的管理和维护,维护公民信息财产安全和社会经济持续健康发展。目前无线电监测中无线电信号参数的测量、同步技术、无线电信号测向和定位技术都是研究的热点。本文主要采用软件无线电技术对上述的热点问题进行研究。本文首先介绍了无线电监测系统的构成、基本功能、软件无线电系统的基本框架,无线电监测的主要内容和监测系统中关键技术的国内外研究现状。然后,以软件无线电作为基础,建立了不同无线电信号调制下的参数测量模型。在模拟无线电信号中,进行了调幅、调相和调频参数测量模型的建立,完成了幅值、相位和频率的解调,并通过MATLAB仿真验证了模型建立的正确性。同时,对数字信号中广泛关注的载波同步技术进行了研究。接着,讨论和分析了无线电测向技术,阐述了无线电测向的频段范围,测向系统的主要构成。研究了基于线性阵列的空间谱估计算法的无线电测向方法,分析了相位测向、幅度测向和空间谱估计测向各自的优缺点,对测向技术数据处理中的测量进行了误差分析和误差修正。最后,着重研究了无线电定位算法,对到达时间差算法(TDOA)的定位算法进行了模型建立和MATLAB仿真。同时,分析了TDOA系统中存在的延时,在几种时延估计方法的基础上,建立了改进的时延模型,进行了仿真验证,证明了本文提出的时延估计算法的优越性。
[Abstract]:Radio technology is one of the rapidly developing technologies in the twenty-first Century, and radio monitoring plays an important role in radio technology. The main content of radio monitoring is to identify and measure the radio signals. The main purpose of the radio monitoring is to carry out the target direction finding and positioning, so as to obtain the effective information of the signal, The radio spectrum resources are managed and maintained accordingly, and the security of citizens' information and property and the sustained and healthy development of the social economy are maintained. At present, the measurement of radio signal parameters, synchronization technology, radio signal direction finding and positioning are the hot spots in the radio monitoring. This paper first introduces the composition of the radio monitoring system, the basic function, the basic framework of the software radio system, the main content of the radio monitoring and the research status of the key technologies in the monitoring system at home and abroad. Then, based on the software radio, the parameters of different radio signal modulation are set up. In the analog radio signal, the amplitude modulation, phase modulation and frequency modulation parameter measurement model is established in the analog radio signal. The demodulation of amplitude, phase and frequency is completed, and the correctness of the model is verified by MATLAB simulation. At the same time, the carrier step technology which is widely concerned in the digital signal is studied. Then, the wireless communication is discussed and analyzed. The frequency range of the radio direction finding and the main composition of the direction finding system are expounded. The radio direction finding method based on the spatial spectrum estimation algorithm based on linear array is studied. The advantages and disadvantages of the phase direction finding, the amplitude direction finding and the spatial spectrum estimation are analyzed, and the error analysis of the measurement in the data processing of the measurement direction technology is analyzed. In the end, we focus on the study of the radio location algorithm, the model establishment of the arrival time difference algorithm (TDOA) and the MATLAB simulation. At the same time, the delay in the TDOA system is analyzed. On the basis of several time delay estimation methods, the modified time delay model is established, and the simulation verification is carried out. It is proved that this paper is proposed in this paper. The superiority of the proposed time delay estimation algorithm.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN98

【参考文献】