本文選題：DVB-T　切入點(diǎn)：解調(diào)　出處：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：近年來(lái),數(shù)字電視產(chǎn)業(yè)取得了長(zhǎng)足的發(fā)展,高質(zhì)量的數(shù)字電視傳輸標(biāo)準(zhǔn)是重要的研究?jī)?nèi)容之一。作為歐洲研發(fā)的地面數(shù)字視頻傳輸標(biāo)準(zhǔn),DVB-T(Digital Video Broadcasting Terrestrial)是當(dāng)前制式應(yīng)用最廣泛、最靈活的標(biāo)準(zhǔn)之一。然而,地面?zhèn)鬏敪h(huán)境對(duì)射頻信號(hào)傳輸影響巨大,且當(dāng)前對(duì)矢量信號(hào)分析測(cè)量的設(shè)備大多依賴國(guó)外進(jìn)口,相應(yīng)的測(cè)試軟件也價(jià)格高昂、不易擴(kuò)展。因此,為科學(xué)評(píng)估DVB-T信號(hào)傳輸信道環(huán)境,計(jì)算各項(xiàng)調(diào)制質(zhì)量指標(biāo),設(shè)計(jì)一款DVB-T解調(diào)與調(diào)制質(zhì)量測(cè)試系統(tǒng)具有十分重要的意義。本文的主要內(nèi)容如下:(1)闡述了OFDM基本理論基礎(chǔ),解讀了DVB-T標(biāo)準(zhǔn),介紹了DVB-T發(fā)射端系統(tǒng),提出了DVB-T接收端完整的解調(diào)設(shè)計(jì)方案。(2)研究了DVB-T標(biāo)準(zhǔn)解調(diào)中主要算法:帶寬模式判定算法、模式識(shí)別與同步算法和信道估計(jì)算法,并提出了一種改進(jìn)DVB-T信道估計(jì)算法,可提高算法精度和降低算法整體復(fù)雜度。(3)設(shè)計(jì)了DVB-T解調(diào)與調(diào)制質(zhì)量測(cè)試系統(tǒng),介紹了測(cè)試系統(tǒng)的需求分析、總體框架設(shè)計(jì),以及采用模塊化設(shè)計(jì)思想的各個(gè)模塊實(shí)現(xiàn)方法。(4)利用相關(guān)實(shí)驗(yàn)設(shè)備選擇測(cè)試用例進(jìn)行了DVB-T信號(hào)的解調(diào)與調(diào)制質(zhì)量測(cè)試系統(tǒng)的測(cè)試與分析,驗(yàn)證了該解調(diào)算法的有效性與測(cè)試系統(tǒng)的正確性。
[Abstract]:In recent years, the digital television industry has made great progress, and the high quality digital television transmission standard is one of the important research contents. As a terrestrial digital video transmission standard developed in Europe, DVB-TU Digital Video Broadcasting Tertiary is the most widely used standard at present. One of the most flexible standards. However, the terrestrial transmission environment has a great impact on RF signal transmission, and most of the current equipment for vector signal analysis and measurement depends on foreign imports, and the corresponding test software is expensive and difficult to expand. It is very important to design a DVB-T demodulation and modulation quality test system for evaluating the environment of DVB-T signal transmission channel scientifically and calculating the modulation quality indexes. The main contents of this paper are as follows: 1) the basic theory of OFDM is expounded. This paper interprets the DVB-T standard, introduces the DVB-T transmitter system, and puts forward the complete demodulation design scheme of the DVB-T receiver. It studies the main algorithms of the DVB-T standard demodulation: the bandwidth pattern decision algorithm, the pattern recognition and synchronization algorithm and the channel estimation algorithm. An improved DVB-T channel estimation algorithm is proposed, which can improve the accuracy of the algorithm and reduce the overall complexity of the algorithm. The DVB-T demodulation and modulation quality testing system is designed. The requirement analysis and the overall framework design of the test system are introduced. And the realization method of each module using modularization design. 4) the test cases of DVB-T signal demodulation and modulation quality testing system are tested and analyzed by using the relevant experimental equipment, the test case is selected, and the demodulation and modulation quality test system of the DVB-T signal is tested and analyzed. The validity of the demodulation algorithm and the correctness of the test system are verified.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN949.197

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 楊知行;;地面數(shù)字電視傳輸標(biāo)準(zhǔn)研究與產(chǎn)業(yè)化進(jìn)展[J];電視技術(shù);2014年22期

2 葉磊;;基于卡爾曼濾波的OFDM系統(tǒng)時(shí)變信道估計(jì)方法[J];微型機(jī)與應(yīng)用;2013年06期

3 洪枚;;DVB-T2系統(tǒng)在歐洲的進(jìn)展[J];衛(wèi)星電視與寬帶多媒體;2012年17期

4 夏定元;李浩;劉鐵;黃鐵;;DVB-T前向預(yù)測(cè)自適應(yīng)信道估計(jì)算法的研究[J];電視技術(shù);2010年S1期

5 張華清;吳娛;;基于DVB-T的OFDM系統(tǒng)的信道估計(jì)研究[J];中國(guó)傳媒大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年04期

6 宋健;;中國(guó)地面數(shù)字電視傳輸標(biāo)準(zhǔn)DTMB與產(chǎn)業(yè)化推廣[J];電子測(cè)量與儀器學(xué)報(bào);2009年09期

7 毛劍慧;黑勇;喬樹(shù)山;吳斌;;基于閾值方法的OFDM系統(tǒng)信道估計(jì)設(shè)計(jì)[J];電視技術(shù);2009年02期

8 王雯芳;張豐華;李兵兵;;基于DVB-T/H系統(tǒng)的模式檢測(cè)和幀同步算法[J];電視技術(shù);2007年S1期

9 吳王華;劉志;周曉方;;一種適用于DVB-T系統(tǒng)的信道估計(jì)算法[J];微電子學(xué)與計(jì)算機(jī);2007年08期

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