本文選題：天氣雷達(dá) + 多普勒天氣雷達(dá)��； 參考：《安徽大學(xué)》2014年碩士論文

【摘要】：本文針對(duì)常規(guī)天氣雷達(dá)和多普勒天氣雷達(dá)做了相關(guān)介紹,特別是對(duì)常規(guī)雷達(dá)和多普勒天氣雷達(dá)的信號(hào)處理算法進(jìn)行了深入的探討,從算法和硬件設(shè)計(jì)上尋求突破,已達(dá)到更好的設(shè)計(jì)性能。 首先,討論了常規(guī)天氣雷達(dá)的發(fā)展以及國(guó)內(nèi)外研究水平概況,以及選題的研究背景和意義,介紹了常規(guī)雷達(dá)的探測(cè)原理,影響云雨雷達(dá)測(cè)量的因素等。還介紹了新一代多普勒天氣雷達(dá)的發(fā)展以及國(guó)內(nèi)外研究水平概況,以720A為例,闡述了天氣雷達(dá)各個(gè)分系統(tǒng)的功能與實(shí)現(xiàn)原理圖,并詳細(xì)說(shuō)明了新一代多普勒天氣雷達(dá)信號(hào)處理的特點(diǎn)。 其次,通過(guò)總結(jié)分析和查閱相關(guān)文獻(xiàn),提出了將chirp-z變換算法應(yīng)用到天氣雷達(dá)信號(hào)處理上,通過(guò)Matlab仿真,說(shuō)明了其對(duì)新一代天氣雷達(dá)的信號(hào)處理有著更好的譜分析能力,和傳統(tǒng)FFT算法對(duì)比,運(yùn)算結(jié)果的精度得到了明顯的提高。而且運(yùn)算量也有所減少。 最后,介紹了FFT算法的FPGA設(shè)計(jì),設(shè)計(jì)實(shí)現(xiàn)了基于一種模塊化設(shè)計(jì)的FFT算法。設(shè)計(jì)采用順序結(jié)構(gòu),各單元在中央控制單元的控制下順序工作。使用了一塊雙口RAM作為中間結(jié)構(gòu)存儲(chǔ)器。蝶形處理部分采用快速?gòu)?fù)數(shù)乘法運(yùn)算,減少了乘法的運(yùn)算次數(shù),提高了運(yùn)算速度,節(jié)省了芯片資源。蝶形處理采用整數(shù)運(yùn)算,每次運(yùn)算存在一定誤差,且隨著運(yùn)算級(jí)數(shù)的增多,誤差會(huì)隨之增大。本設(shè)計(jì)還采用簡(jiǎn)易快捷的地址生成邏輯。這為FFT變換算法應(yīng)用到新一代多普勒雷天氣雷達(dá)信號(hào)處理系統(tǒng)上做了很好地鋪墊。
[Abstract]:In this paper, the conventional weather radar and Doppler weather radar are introduced, especially the signal processing algorithms of conventional weather radar and Doppler weather radar are discussed in depth, and a breakthrough in algorithm and hardware design is sought.Better design performance has been achieved.Firstly, the development of conventional weather radar and the research level at home and abroad are discussed. The research background and significance of the topic are also discussed. The detection principle of conventional radar and the factors influencing the measurement of cloud and rain radar are introduced.This paper also introduces the development of new generation Doppler weather radar and the general situation of research level at home and abroad. Taking 720A as an example, the function and realization principle of each subsystem of weather radar are described.The characteristics of the new generation Doppler weather radar signal processing are described in detail.Secondly, through summing up and analyzing and consulting relevant literature, this paper puts forward the application of chirp-z transform algorithm to weather radar signal processing. Through Matlab simulation, it shows that it has better spectral analysis ability for the new generation weather radar signal processing.Compared with the traditional FFT algorithm, the accuracy of the algorithm is improved obviously.And the amount of computation has also been reduced.Finally, the FPGA design of FFT algorithm is introduced, and the FFT algorithm based on modular design is designed and implemented.The design adopts sequential structure and each unit works sequentially under the control of central control unit.A dual port RAM is used as the intermediate structure memory.Butterfly processing adopts fast complex multiplication, which reduces the number of times of multiplication, improves the speed of operation and saves the chip resources.The butterfly processing uses integer operation, each operation has a certain error, and with the increase of operation series, the error will increase.This design also adopts simple and fast address generation logic.This provides a good basis for the application of FFT transform algorithm to the new generation Doppler radar signal processing system.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN957.51

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 秦琰琰;李柏;張沛源;;降水的雷達(dá)反射率因子與大氣相對(duì)濕度的相關(guān)關(guān)系研究[J];大氣科學(xué);2006年02期

2 梁華;陳旭輝;;CINRAD/CC雷達(dá)信號(hào)頻譜特性分析應(yīng)用研究[J];電子測(cè)量與儀器學(xué)報(bào);2009年S1期

3 馮維婷;;Chirp-Z變換在CW雷達(dá)高精度速度測(cè)量中的應(yīng)用[J];電子科技;2007年09期

4 許小峰;中國(guó)新一代多普勒天氣雷達(dá)網(wǎng)的建設(shè)與技術(shù)應(yīng)用[J];中國(guó)工程科學(xué);2003年06期

5 馬學(xué)謙;董萬(wàn)勝;楚榮忠;韋志剛;;X波段雙偏振多普勒天氣雷達(dá)降雨估算試驗(yàn)[J];高原氣象;2008年02期

6 王瑾;劉黎平;;CINRAD/CD雷達(dá)反射率因子同化對(duì)中尺度數(shù)值模式云微物理量場(chǎng)調(diào)整的分析[J];高原氣象;2009年01期

7 葉盤錫,陳忠勇;美國(guó)WSR-81S天氣雷達(dá)天線增益標(biāo)定技術(shù)[J];南京氣象學(xué)院學(xué)報(bào);1990年04期

8 韓濤;劉旭丹;;ADWR多普勒天氣雷達(dá)伺服系統(tǒng)故障分析與處理[J];黑龍江科學(xué);2013年01期

9 梁毅;王虹現(xiàn);張龍;保錚;;基于二維Chirp-Z變換的前視FMCW雷達(dá)成像新方法[J];中國(guó)科學(xué):信息科學(xué);2010年05期

10 梁華;;脈沖多普勒天氣雷達(dá)數(shù)據(jù)質(zhì)量控制之解速度模糊處理[J];氣象水文海洋儀器;2009年03期

相關(guān)博士學(xué)位論文 前1條

1 李江挺;電磁波在空間等離子體中傳輸與散射若干問(wèn)題研究[D];西安電子科技大學(xué);2012年

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