【摘要】：隨著社會(huì)的發(fā)展,人們對(duì)周界檢測(cè)的需求日益強(qiáng)烈。周界檢測(cè)雷達(dá)因其可以廣泛應(yīng)用于反恐、島礁防衛(wèi)、機(jī)場監(jiān)視等諸多領(lǐng)域而受到高度重視。本文縱觀國內(nèi)外研究動(dòng)態(tài),確定調(diào)頻連續(xù)波(FMCW)的工作體制。根據(jù)周界檢測(cè)雷達(dá)的實(shí)際特點(diǎn)設(shè)計(jì)了一種獨(dú)立本振的雷達(dá)系統(tǒng)結(jié)構(gòu)。在此基礎(chǔ)上研究了周界檢測(cè)雷達(dá)雜波背景下的慢速入侵目標(biāo)檢測(cè)算法。針對(duì)該算法存在盲速的不足,提出了一種周界入侵目標(biāo)綜合檢測(cè)算法實(shí)現(xiàn)大動(dòng)態(tài)速度范圍入侵目標(biāo)檢測(cè)。設(shè)計(jì)周界檢測(cè)雷達(dá)算法驗(yàn)證樣機(jī),從實(shí)際的角度對(duì)綜合檢測(cè)算法進(jìn)行驗(yàn)證。主要工作包括:1.從接收機(jī)匹配濾波器輸出的角度推導(dǎo)線性調(diào)頻連續(xù)波(LFMCW)雷達(dá)信號(hào)歸一化模糊函數(shù),分析其固有的目標(biāo)分辨率。設(shè)計(jì)獨(dú)立本振的雷達(dá)系統(tǒng)結(jié)構(gòu),研究該結(jié)構(gòu)下的信號(hào)處理技術(shù),從信號(hào)處理的角度解釋LFMCW信號(hào)存在的“距離-多普勒”耦合現(xiàn)象,最終確定對(duì)稱三角線性調(diào)頻連續(xù)波(ST-LFMCW)的發(fā)射波形。2.針對(duì)雜波背景下的慢速入侵目標(biāo)檢測(cè)問題,建立多周期ST-LFMCW雷達(dá)中頻回波信號(hào)模型,結(jié)合運(yùn)動(dòng)目標(biāo)顯示(MTI)與二維快速傅里葉變換(2D-FFT)技術(shù)研究了周界檢測(cè)雷達(dá)的慢速入侵目標(biāo)檢測(cè)算法。從目標(biāo)分辨率、積累增益、信雜比改善、最小可檢測(cè)速度以及盲速的角度分析算法的性能。通過計(jì)算機(jī)仿真驗(yàn)證了算法的效果,為系統(tǒng)參數(shù)設(shè)計(jì)提供依據(jù)。3.針對(duì)周界檢測(cè)雷達(dá)MTI+2D-FFT算法存在盲速的不足,研究了頻域?qū)ο?FDC)算法,以此為基礎(chǔ)提出了綜合入侵檢測(cè)算法,在實(shí)現(xiàn)慢速入侵目標(biāo)檢測(cè)的同時(shí)克服MTI算法的盲速問題,實(shí)現(xiàn)大動(dòng)態(tài)速度范圍入侵目標(biāo)檢測(cè)。從目標(biāo)分辨率、積累增益、信雜比改善以及速度檢測(cè)范圍的角度對(duì)算法進(jìn)行性能分析,并利用計(jì)算機(jī)仿真驗(yàn)證了算法的效果。4.研制周界檢測(cè)雷達(dá)算法驗(yàn)證樣機(jī)。依據(jù)仿真的參數(shù)進(jìn)行總體方案的規(guī)劃,著重設(shè)計(jì)了雷達(dá)核心控制器的時(shí)序邏輯并進(jìn)行了仿真驗(yàn)證。開展外場實(shí)驗(yàn),從實(shí)際的角度驗(yàn)證了周界檢測(cè)雷達(dá)綜合入侵檢測(cè)算法大動(dòng)態(tài)速度范圍入侵目標(biāo)檢測(cè)的有效性。
[Abstract]:With the development of society, the demand for perimeter detection is increasingly strong. Perimeter detection radar has been widely used in anti-terrorism, reef defense, airport surveillance and many other fields. In this paper, the research trends at home and abroad are reviewed, and the working system of FM CW (FMCW) is determined. According to the practical characteristics of perimeter detection radar, an independent local oscillator radar system structure is designed. On the basis of this, the detection algorithm of slow intrusion target in the background of perimeter detection radar clutter is studied. In order to solve the problem of blind speed, a comprehensive detection algorithm of perimeter intrusion target is proposed to detect large dynamic velocity target in large dynamic range. The algorithm verification prototype of perimeter detection radar is designed, and the synthetic detection algorithm is verified from the practical point of view. The main work includes: 1. From the point of view of the output of receiver matched filter, the normalized ambiguity function of linear frequency modulated continuous wave (LFMCW) radar signal is derived, and its inherent target resolution is analyzed. The radar system structure of independent local oscillator is designed, the signal processing technology under this structure is studied, and the "range-Doppler" coupling phenomenon of LFMCW signal is explained from the point of view of signal processing. Finally, the transmitting waveform of symmetric triangular linear frequency modulated continuous wave (ST-LFMCW) is determined. 2. Aiming at the problem of slow intrusion target detection in clutter background, a multi-period ST-LFMCW radar intermediate frequency echo signal model is established. Combined with moving target display (MTI) and two-dimensional fast Fourier transform (2D-FFT) technology, the slow intrusion target detection algorithm of perimeter detection radar is studied. The performance of the algorithm is analyzed from the angle of target resolution, cumulative gain, improved signal-to-clutter ratio, minimum detectable speed and blind velocity. The effect of the algorithm is verified by computer simulation, which provides the basis for the design of system parameters. 3. Aiming at the shortage of blind speed in MTI 2D-FFT algorithm of perimeter detection radar, the frequency domain canceling (FDC) algorithm is studied. Based on this, a comprehensive intrusion detection algorithm is proposed, which can overcome the blind speed problem of MTI algorithm while realizing slow speed target detection. The large dynamic velocity range intrusion target detection is realized. The performance of the algorithm is analyzed from the point of view of target resolution, accumulated gain, improved signal-to-clutter ratio and speed detection range, and the effect of the algorithm is verified by computer simulation. The algorithm verification prototype of perimeter detection radar is developed. According to the parameters of the simulation, the overall scheme planning is carried out, and the timing logic of the radar core controller is designed and verified by simulation. The outfield experiments are carried out to verify the effectiveness of the synthetic intrusion detection algorithm for perimeter detection radar in large dynamic velocity range.
【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)】：TN95

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 繆圣凱;;淺談周界報(bào)警市場現(xiàn)狀及發(fā)展趨勢(shì)[J];中國安防;2014年17期

2 王月鵬,趙國慶;二維FFT算法在LFMCW雷達(dá)信號(hào)處理中的應(yīng)用及其性能分析[J];電子科技;2005年05期

3 杜川華,龔耀寰;LFMCW雷達(dá)的距離/多普勒處理[J];電子科技大學(xué)學(xué)報(bào);2004年01期

4 楊建宇,凌太兵,賀峻;LFMCW雷達(dá)運(yùn)動(dòng)目標(biāo)檢測(cè)與距離速度去耦合[J];電子與信息學(xué)報(bào);2004年02期

5 張尉,寧永安;X頻段在地面警戒雷達(dá)中的應(yīng)用特性[J];火力與指揮控制;2003年05期

6 楊建宇;LFMCW雷達(dá)信號(hào)模糊函數(shù)分析[J];信號(hào)處理;2002年01期

7 張立志,汪學(xué)剛,向敬成;線形調(diào)頻連續(xù)波雷達(dá)的動(dòng)目標(biāo)顯示[J];信號(hào)處理;2000年03期

8 陳祝明，丁義元，向敬成;線性調(diào)頻連續(xù)波雷達(dá)的噪聲性能分析[J];電子科技大學(xué)學(xué)報(bào);1999年01期

9 劉國歲，，孫光民，顧紅，朱曉華;連續(xù)波雷達(dá)及其信號(hào)處理技術(shù)[J];現(xiàn)代雷達(dá);1995年06期

相關(guān)博士學(xué)位論文 前1條

1 吳禮;近程毫米波LFMCW雷達(dá)多目標(biāo)信號(hào)分析與處理方法研究[D];南京理工大學(xué);2008年

相關(guān)碩士學(xué)位論文 前5條

1 張也;低截獲測(cè)速雷達(dá)技術(shù)研究[D];電子科技大學(xué);2015年

2 孫作亮;基于步進(jìn)頻率的安防雷達(dá)設(shè)計(jì)[D];電子科技大學(xué);2013年

3 曾海濤;基于LFMICW雷達(dá)的入侵檢測(cè)技術(shù)研究[D];電子科技大學(xué);2012年

4 林偉;LFMCW警戒雷達(dá)信號(hào)處理算法分析及硬件設(shè)計(jì)[D];西安電子科技大學(xué);2012年

5 羅茂麒;近程警戒雷達(dá)信號(hào)處理設(shè)計(jì)與實(shí)現(xiàn)[D];電子科技大學(xué);2010年

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