本文選題：三角波調(diào)頻　切入點(diǎn)：測距測速　出處：《南京理工大學(xué)》2017年碩士論文

【摘要】：線性調(diào)頻近程探測系統(tǒng)具有無距離盲區(qū)、低發(fā)射功率、結(jié)構(gòu)簡單等特點(diǎn),廣泛應(yīng)用于各個領(lǐng)域,尤其是軍事領(lǐng)域�，F(xiàn)代戰(zhàn)場電磁環(huán)境復(fù)雜,人為干擾下的系統(tǒng)性能和抗干擾方法成為研究重點(diǎn)。本文主要包括三角波調(diào)頻近程探測系統(tǒng)干擾分析與抗干擾信號處理技術(shù)研究。首先理論分析了三角波調(diào)頻探測系統(tǒng)的差頻信號,研究了基于線性調(diào)頻Z變換(Chirp Z Transform,CZT)的測距和基于動目標(biāo)檢測(Moving Target Detection,MTD)的測速算法,通過仿真對算法進(jìn)行了驗(yàn)證。其次研究了調(diào)幅干擾和調(diào)頻干擾對系統(tǒng)的干擾機(jī)理,仿真結(jié)果表明調(diào)幅干擾和調(diào)頻干擾在特定參數(shù)下均會使系統(tǒng)測距測速性能惡化。根據(jù)干擾信號特性提出基于分?jǐn)?shù)階傅里葉變換(Fractional Fourier Transform,FrFT)的抗干擾算法,仿真結(jié)果表明在信干比達(dá)到-10dB時仍可以有效抑制噪聲調(diào)幅干擾、三角波調(diào)幅干擾和部分噪聲調(diào)頻干擾。然后根據(jù)指標(biāo)要求完成系統(tǒng)信號處理軟硬件設(shè)計(jì),硬件設(shè)計(jì)包括信號處理板的設(shè)計(jì)、加工、焊接和調(diào)試。軟件設(shè)計(jì)為信號處理整體方案的可編程邏輯陣列(Field Programmable Gate Array,FPGA)實(shí)現(xiàn),包括算法離散形式推導(dǎo)、程序編寫編譯和功能驗(yàn)證。最后將信號處理電路和前端射頻天線構(gòu)成完整系統(tǒng),完成外場測距測速實(shí)驗(yàn)和抗干擾實(shí)驗(yàn)。無干擾條件下,外場實(shí)測測距和測速誤差均在系統(tǒng)指標(biāo)允許范圍內(nèi)。施加干擾后通過抗干擾算法大大降低測距測速誤差,達(dá)到系統(tǒng)指標(biāo)要求。
[Abstract]:The linear frequency modulation (LFM) short-range detection system is widely used in various fields, especially in military field, because of its characteristics of no blind area, low transmitting power, simple structure, etc. The electromagnetic environment of modern battlefield is complex. The system performance and anti-jamming methods under artificial interference have become the focus of research. This paper mainly includes interference analysis and anti-jamming signal processing technology of triangular wave FM short-range detection system. Firstly, the theory analysis of triangular wave FM detection is given. The differential frequency signal of the measuring system, The algorithm of ranging based on Chirp Z transform and moving Target detection based on moving target is studied. The algorithm is verified by simulation. Secondly, the interference mechanism of AM jamming and FM jamming to the system is studied. The simulation results show that both AM jamming and FM jamming can worsen the range measurement performance of the system under certain parameters. According to the characteristics of the jamming signal, an anti-jamming algorithm based on fractional Fourier transform (Fractional Fourier transform) is proposed. The simulation results show that noise AM interference, triangular wave AM interference and partial noise FM interference can be effectively suppressed when the signal-to-interference ratio reaches -10dB, and then the hardware and software design of the system signal processing is completed according to the requirements of the index. The hardware design includes the design, processing, welding and debugging of the signal processing board. Finally, the signal processing circuit and the front-end RF antenna are formed into a complete system to complete the field ranging and velocity measurement experiment and anti-jamming experiment. The error of ranging and velocity measurement in the field is within the allowable range of the system index, and the anti-jamming algorithm can greatly reduce the error of ranging and velocimetry after the interference is applied, so as to meet the requirements of the system.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN911.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 王春陽;劉雪蓮;;分?jǐn)?shù)階Fourier變換在信號處理中的應(yīng)用研究[J];長春理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年05期

2 簡勛;張希軍;張守龍;楊潔;;等幅連續(xù)波輻照下調(diào)頻引信小信號干擾機(jī)理研究[J];無線電工程;2015年08期

3 路翠華;李國林;謝鑫;;基于自適應(yīng)陷波器的噪聲調(diào)頻干擾抑制方法[J];探測與控制學(xué)報(bào);2014年06期

4 詹啟東;涂亞慶;;基于Rife法的線性調(diào)頻連續(xù)波雷達(dá)測距算法及實(shí)現(xiàn)[J];兵工學(xué)報(bào);2014年05期

5 熊波;路明;尚雅玲;趙曦;;連續(xù)波對三角波調(diào)頻無線電引信的壓制干擾效應(yīng)分析[J];彈箭與制導(dǎo)學(xué)報(bào);2011年02期

6 王洋;張曉林;金甲;;直擴(kuò)系統(tǒng)中線性調(diào)頻干擾抑制技術(shù)研究[J];儀器儀表用戶;2010年04期

7 劉大臣;徐軍濤;;狼群攻擊系統(tǒng)研究[J];飛航導(dǎo)彈;2008年10期

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

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