基于GSM信号的外辐射源雷达信号处理研究

发布时间：2018-06-18 04:35

本文选题：无源雷达 + GSM　；参考：《电子科技大学》2014年硕士论文

【摘要】：随着现代战争中电子战的不断发展,传统雷达越来越受到挑战。传统雷达发射的信号会受到敌方监听、针对性的干扰,以及毁灭打击。因此无源雷达(被动雷达或称为外辐射源雷达)以它本身不发射信号的特点逐渐受到人们的关注。而其中利用民用信号的无源雷达是其中一个较为热门的方向。本篇文章主要研究针对的是基于GSM信号的无源雷达,它利用手机基站信号为辐射源,用双基地雷达原理探测目标,GSM系统是拥有国际标准的通信信号,有着规范的编码、调制以及发送标准,信号波形有着严格的控制,因此作为信号源时有自己特点。现将本文的主要工作总结如下:1.讨论了GSM信号信道特征以及作为雷达信号源的可行性。针对GSM手机基站信号作为雷达信号源,论文对信号的时域与频域分辨力进行了分析,验证了GSM手机基站信号作为无源雷达信号源的可行性,同时根据GSM基站中不同信道的特点,找到其中作为雷达信号具有优势的下行广播信道作为研究的基础信号。2.基于GSM信号的无源雷达信号处理模块算法仿真。以传统无源雷达信号处理为模型,仿真了信号处理流程中较为重要的直达波对消以及二维模糊提取参数模块。针对直达波对消模块,面对直达波通道接收信号不纯净的问题,提出了基于解调的提纯方法,仿真并验证了该方法的可行性。针对二维模糊函数提取参数模块,根据雷达探测参数的性质,结合仿真环境,改进简化了二维模糊相关算法,提升了算法效率。3.利用多个GSM基站作为信号源定位可行性研究。讨论了单基站作为信号源时定位的威力范围,针对探测范围较小加入了其他基站作为信号源,仿真验证了威力范围的提升。针对GSM基站间频点分配会遇到的同频干扰问题,提出了相对的解决方案,利用解决方案仿真并验证了多基站联合定位的可行性。同时,多信号源定位会带来定位精度的优势,仿真验证了定位精度的提升。
[Abstract]:With the continuous development of electronic warfare in modern warfare, traditional radar is more and more challenged. Traditional radar signals are monitored, targeted, and destroyed. Therefore passive radar (passive radar or external emitter radar) has been paid more and more attention because it does not transmit signals. Among them, passive radar with civil signal is one of the most popular directions. This paper focuses on passive radar based on GSM signal. It uses base station signal of mobile phone as emitter and detects target with bistatic radar principle. GSM system has international standard communication signal and has standard code. Modulation and transmission standards, signal waveform has strict control, so as a signal source has its own characteristics. The main work of this paper is summarized as follows: 1. The characteristics of GSM signal channel and its feasibility as radar signal source are discussed. Aiming at GSM base station signal as radar signal source, this paper analyzes the signal resolution in time domain and frequency domain, and verifies the feasibility of GSM mobile phone base station signal as passive radar signal source. At the same time, according to the characteristics of different channels in GSM base station. The downlink broadcast channel, which has advantages as radar signal, is found as the basic signal. 2. Algorithm simulation of passive radar signal processing module based on GSM signal. Taking the traditional passive radar signal processing as the model, the more important direct wave cancellation and two-dimensional fuzzy extraction parameter modules in the signal processing flow are simulated. In order to solve the problem that the received signal of direct wave channel is not pure, a demodulation based purification method is proposed, and the feasibility of this method is verified by simulation. According to the properties of radar detection parameters and simulation environment, this paper improves and simplifies the two-dimensional fuzzy correlation algorithm and improves the efficiency of the algorithm. Feasibility study on location of multiple GSM base stations as signal source. The power range of single base station is discussed when it is used as signal source. Other base stations are added as signal source for small detection range, and the enhancement of power range is verified by simulation. Aiming at the same frequency interference problem of frequency distribution among GSM base stations, a relative solution is put forward. The feasibility of joint location of multiple base stations is simulated and verified by using the solution. At the same time, multi-source positioning will bring the advantages of positioning accuracy, simulation results show that the positioning accuracy is improved.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51;TN929.532

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