【摘要】：隨著現(xiàn)代科學(xué)技術(shù)的發(fā)展,傳統(tǒng)體制雷達(dá)越來(lái)越受到電子干擾、隱身技術(shù)、反輻射導(dǎo)彈、超低空突防等四大威脅。被動(dòng)雷達(dá)由于不需要自身發(fā)射信號(hào),而是利用第三方外輻射源信號(hào),因此具有對(duì)抗四大威脅的良好特性。近年來(lái),被動(dòng)雷達(dá)受到越來(lái)越多的關(guān)注。移動(dòng)通信信號(hào)具有廣覆蓋、方便組網(wǎng)等優(yōu)點(diǎn),是一種優(yōu)良的外輻射源信號(hào),因此受到被動(dòng)雷達(dá)研究者的重視。本文研究基于4G基站信號(hào)的被動(dòng)雷達(dá)系統(tǒng),完成的主要研究工作如下:1、深入分析4G移動(dòng)通信系統(tǒng)的技術(shù)特點(diǎn),根據(jù)雷達(dá)探測(cè)理論,分析了LTE信號(hào)的距離和多普勒分辨率;詳細(xì)分析了LTE信號(hào)的模糊函數(shù),并具體解釋了產(chǎn)生旁瓣的原因;通過(guò)和其他常見(jiàn)外輻射源信號(hào)的對(duì)比,驗(yàn)證了LTE信號(hào)具有良好的特性;利用雙基地雷達(dá)方程計(jì)算了4G基站信號(hào)被動(dòng)雷達(dá)的理論威力范圍,完成了對(duì)基于4G基站信號(hào)的被動(dòng)雷達(dá)的可行性分析。2、針對(duì)目標(biāo)回波信號(hào)中含有強(qiáng)大的直達(dá)波和多徑等雜波問(wèn)題,研究了直達(dá)波和多徑雜波對(duì)消技術(shù)。分析比較了LMS算法、NLMS算法、ECA算法和RLS算法這四種算法在4G基站信號(hào)被動(dòng)雷達(dá)系統(tǒng)中雜波抑制性能。綜合考慮雜波抑制比和權(quán)值收斂速度等指標(biāo),采用了基于RLS算法的自適應(yīng)雜波對(duì)消算法,并通過(guò)仿真實(shí)驗(yàn),驗(yàn)證了RLS算法的有效性。3、針對(duì)多目標(biāo)檢測(cè)過(guò)程中傳統(tǒng)雷達(dá)目標(biāo)方法無(wú)法檢測(cè)出弱目標(biāo)信號(hào)的問(wèn)題,研究了基于壓縮感知理論的4G基站信號(hào)被動(dòng)雷達(dá)系統(tǒng)目標(biāo)檢測(cè)方法。將壓縮感知理論的稀疏重構(gòu)思想應(yīng)用到被動(dòng)雷達(dá)目標(biāo)檢測(cè)中,并在多個(gè)目標(biāo)環(huán)境的仿真實(shí)驗(yàn)中,檢測(cè)出強(qiáng)弱目標(biāo),驗(yàn)證了本文所采用方法的有效性,為被動(dòng)雷達(dá)目標(biāo)檢測(cè)提供了另一種性能較好的算法。
[Abstract]:With the development of modern science and technology, the traditional radar is more and more threatened by electronic jamming, stealth technology, anti-radiation missile and ultra-low altitude penetration. Passive radar does not need to transmit signal itself, but uses the signal of external emitter of third party, so it has the good characteristic of countering the four major threats. In recent years, passive radar has attracted more and more attention. Mobile communication signal has the advantages of wide coverage, convenient networking and so on. It is an excellent external emitter signal, so it has been paid attention to by passive radar researchers. In this paper, the passive radar system based on 4G base station signal is studied. The main research work is as follows: 1. The technical characteristics of 4G mobile communication system are deeply analyzed. According to the radar detection theory, the range and Doppler resolution of LTE signal are analyzed. The ambiguity function of LTE signal is analyzed in detail, and the reason of producing sidelobe is explained concretely, and the comparison of LTE signal with other common external emitter signals proves that LTE signal has good characteristics. The theoretical power range of 4G base station signal passive radar is calculated by using bistatic radar equation. The feasibility analysis of passive radar based on 4G base station signal is completed. Aiming at the problem that the target echo signal contains powerful direct wave and multipath clutter, the technology of direct wave and multipath clutter cancellation is studied. This paper analyzes and compares the clutter suppression performance of LMS algorithm and RLS algorithm in 4G base station signal passive radar system. Considering the index of clutter suppression ratio and weight convergence rate, the adaptive clutter cancellation algorithm based on RLS algorithm is adopted, and the simulation experiment is carried out. The effectiveness of RLS algorithm is verified. Aiming at the problem that traditional radar target method can not detect weak target signal in the process of multi-target detection, the passive radar system target detection method of 4G base station signal based on compression sensing theory is studied. The sparse reconstruction of compressed sensing theory is applied to passive radar target detection, and the strong and weak targets are detected in the simulation experiments in many target environments. The effectiveness of the proposed method is verified. It provides another algorithm with good performance for passive radar target detection.
【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】：2016
【分類號(hào)】：TN929.5;TN95

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐波;程水英;張浩;;外輻射源雷達(dá)模糊函數(shù)副峰抑制算法研究[J];電子學(xué)報(bào);2015年06期

2 萬(wàn)顯榮;岑博;程豐;饒?jiān)迫A;龔子平;;基于CMMB的外輻射源雷達(dá)信號(hào)模糊函數(shù)分析與處理[J];電子與信息學(xué)報(bào);2011年10期

3 宋杰;何友;蔡復(fù)青;唐小明;;基于非合作雷達(dá)輻射源的無(wú)源雷達(dá)技術(shù)綜述[J];系統(tǒng)工程與電子技術(shù);2009年09期

4 石光明;劉丹華;高大化;劉哲;林杰;王良君;;壓縮感知理論及其研究進(jìn)展[J];電子學(xué)報(bào);2009年05期

5 耿妍;張端金;;自適應(yīng)濾波算法綜述[J];信息與電子工程;2008年04期

6 朱家兵;洪一;;基于復(fù)倒譜技術(shù)的無(wú)源雷達(dá)直達(dá)波提純方法[J];現(xiàn)代雷達(dá);2007年08期

7 楊建廣;吳道慶;;調(diào)頻廣播臺(tái)直達(dá)波與地雜波強(qiáng)度分析[J];現(xiàn)代雷達(dá);2005年12期

8 辛云宏;楊萬(wàn)海;;被動(dòng)多站多目標(biāo)的測(cè)量數(shù)據(jù)關(guān)聯(lián)算法研究[J];宇航學(xué)報(bào);2005年06期

9 王俊,保錚,張守宏;無(wú)源探測(cè)與跟蹤雷達(dá)系統(tǒng)技術(shù)及其發(fā)展[J];雷達(dá)科學(xué)與技術(shù);2004年03期

10 張軍華;“靜默哨兵”—— 一種新型無(wú)源反隱身雷達(dá)[J];現(xiàn)代防御技術(shù);2000年01期

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本文編號(hào)：2232511