本文選題：無源雷達(dá) + GSM�。� 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著現(xiàn)代戰(zhàn)爭(zhēng)中電子戰(zhàn)的不斷發(fā)展,傳統(tǒng)雷達(dá)越來越受到挑戰(zhàn)。傳統(tǒng)雷達(dá)發(fā)射的信號(hào)會(huì)受到敵方監(jiān)聽、針對(duì)性的干擾,以及毀滅打擊。因此無源雷達(dá)(被動(dòng)雷達(dá)或稱為外輻射源雷達(dá))以它本身不發(fā)射信號(hào)的特點(diǎn)逐漸受到人們的關(guān)注。而其中利用民用信號(hào)的無源雷達(dá)是其中一個(gè)較為熱門的方向。本篇文章主要研究針對(duì)的是基于GSM信號(hào)的無源雷達(dá),它利用手機(jī)基站信號(hào)為輻射源,用雙基地雷達(dá)原理探測(cè)目標(biāo),GSM系統(tǒng)是擁有國際標(biāo)準(zhǔn)的通信信號(hào),有著規(guī)范的編碼、調(diào)制以及發(fā)送標(biāo)準(zhǔn),信號(hào)波形有著嚴(yán)格的控制,因此作為信號(hào)源時(shí)有自己特點(diǎn)�，F(xiàn)將本文的主要工作總結(jié)如下:1.討論了GSM信號(hào)信道特征以及作為雷達(dá)信號(hào)源的可行性。針對(duì)GSM手機(jī)基站信號(hào)作為雷達(dá)信號(hào)源,論文對(duì)信號(hào)的時(shí)域與頻域分辨力進(jìn)行了分析,驗(yàn)證了GSM手機(jī)基站信號(hào)作為無源雷達(dá)信號(hào)源的可行性,同時(shí)根據(jù)GSM基站中不同信道的特點(diǎn),找到其中作為雷達(dá)信號(hào)具有優(yōu)勢(shì)的下行廣播信道作為研究的基礎(chǔ)信號(hào)。2.基于GSM信號(hào)的無源雷達(dá)信號(hào)處理模塊算法仿真。以傳統(tǒng)無源雷達(dá)信號(hào)處理為模型,仿真了信號(hào)處理流程中較為重要的直達(dá)波對(duì)消以及二維模糊提取參數(shù)模塊。針對(duì)直達(dá)波對(duì)消模塊,面對(duì)直達(dá)波通道接收信號(hào)不純凈的問題,提出了基于解調(diào)的提純方法,仿真并驗(yàn)證了該方法的可行性。針對(duì)二維模糊函數(shù)提取參數(shù)模塊,根據(jù)雷達(dá)探測(cè)參數(shù)的性質(zhì),結(jié)合仿真環(huán)境,改進(jìn)簡(jiǎn)化了二維模糊相關(guān)算法,提升了算法效率。3.利用多個(gè)GSM基站作為信號(hào)源定位可行性研究。討論了單基站作為信號(hào)源時(shí)定位的威力范圍,針對(duì)探測(cè)范圍較小加入了其他基站作為信號(hào)源,仿真驗(yàn)證了威力范圍的提升。針對(duì)GSM基站間頻點(diǎn)分配會(huì)遇到的同頻干擾問題,提出了相對(duì)的解決方案,利用解決方案仿真并驗(yàn)證了多基站聯(lián)合定位的可行性。同時(shí),多信號(hào)源定位會(huì)帶來定位精度的優(yōu)勢(shì),仿真驗(yàn)證了定位精度的提升。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN957.51;TN929.532

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本文編號(hào)：2034109