數(shù)字電視單頻網(wǎng)技術研究.doc
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數(shù)字電視單頻網(wǎng)技術研究,全文45頁 約20000字論述翔實摘要數(shù)字電視技術是近20年來發(fā)展最快的技術之一。我國的數(shù)字電視產(chǎn)業(yè)正在迅速發(fā)展，數(shù)字電視地面廣播呼聲日高，數(shù)字電視取代模擬電視的時代已經(jīng)到來。所謂數(shù)字電視就是將模擬電視信號經(jīng)取樣、量化和編碼后轉換成二進制數(shù)表示的數(shù)字信號，然后進行各種處理，如編碼、調制、傳輸、存儲...
內容介紹
此文檔由會員 癡狂少年 發(fā)布
數(shù)字電視單頻網(wǎng)技術研究
全文45頁 約20000字 論述翔實
摘 要
數(shù)字電視技術是近20年來發(fā)展最快的技術之一。我國的數(shù)字電視產(chǎn)業(yè)正在迅速發(fā)展，數(shù)字電視地面廣播呼聲日高，數(shù)字電視取代模擬電視的時代已經(jīng)到來。所謂數(shù)字電視就是將模擬電視信號經(jīng)取樣、量化和編碼后轉換成二進制數(shù)表示的數(shù)字信號，然后進行各種處理，如編碼、調制、傳輸、存儲等。數(shù)字電視之所以會大規(guī)模的流行，并逐步取代模擬電視，是因為在當今許多的城市及周邊地區(qū)，容易受到眾多高層建筑物多徑干擾的影響，使接收效果惡化，如果想靠增加發(fā)射機的功率和天線的高度來解決此問題將是很不經(jīng)濟的、也是不現(xiàn)實的。而單頻網(wǎng)就是相鄰發(fā)射臺用同一個頻道發(fā)送同一個節(jié)目，這樣就很好地解決了接收問題。單頻網(wǎng)的優(yōu)點是：（1）節(jié)省頻率資源；（2）覆蓋范圍大。它是通過采用類似于蜂窩網(wǎng)的方式，以增加覆蓋范圍。
論文在查閱了大量有關文獻資料的基礎上，針對當前數(shù)字電視的發(fā)展情況以及單頻網(wǎng)技術的發(fā)展，做了一定的研究，并對其進行了仿真分析。論文中對MATLAB仿真環(huán)境方面的知識進行了簡單介紹。
關鍵詞：數(shù)字電視，地面廣播傳輸標準，單頻網(wǎng)
ABSTRACT
The technology of the digital TV is one of the technology with the fastest developing speed in the past 20 years. The digital TV Industry of our country is developing rapidly, Broadcast in digital television ground voice loudly, the era of replacing the analogue TV of the digital TV has already come. The so-called digital TV changes the anolog TV signals into the digital signal that a binary number show through taking a sample, quantizing and encoding, then go on various kinds of treatment, code for instance , modulate , transmit , store. The prevalence that the digital TV will be extensive , and replace the analogue TV progressively , because in nowadays a lot of cities and surrounding area, easy to influence by the fact that it is interfered directly that there are many numerous high level buildings, make reception worsen, is it is it increase power and height of aerial of transmitter solve problem this very uneconomical , unrealistic too to lean against to want. And the network is that the adjoint launching stand sends the same program with the same channel frequently only, well solve the problem of receiving like this. The advantage of the network is frequently only: (1) Save frequency resources; (2)The coverage is big. It is by way of adopting and is similar to the honeycomb network, in order to increase the coverage.
The thesis is directed against the development of the present digital TV and development of the technology of the network frequently only on the basis of consulting generously and about documents and materials, have done certain research, and has carried on emulation analysis to it. Have carried on the simple introduction to MATLAB artificial environment knowledge in the thesis.
Key words：Digital TV; DVB-T; SFN
部分參考文獻
[9] 佟學儉.OFDM 移動通信技術原理與應用.人民郵電出版社，2003
[10] 尤鞏圻.電視發(fā)射機與差轉機.中國廣播電視出版社，1994
[11] 樊昌信.通信原理.國防工業(yè)出版社，1993
[12] 郭梯云.移動通信西安電子科技大學出版社，2004
[13] 龔 波.QAM 調制信號測試原理.2002 年第六屆全國有線電視、衛(wèi)星、覆蓋、音頻、 視頻及記錄研討會論文集，2002
[14] 張 珉.DVB -T 開路數(shù)字地面電視.世界寬帶網(wǎng)絡雜志，2004
全文45頁 約20000字 論述翔實
摘 要
數(shù)字電視技術是近20年來發(fā)展最快的技術之一。我國的數(shù)字電視產(chǎn)業(yè)正在迅速發(fā)展，數(shù)字電視地面廣播呼聲日高，數(shù)字電視取代模擬電視的時代已經(jīng)到來。所謂數(shù)字電視就是將模擬電視信號經(jīng)取樣、量化和編碼后轉換成二進制數(shù)表示的數(shù)字信號，然后進行各種處理，如編碼、調制、傳輸、存儲等。數(shù)字電視之所以會大規(guī)模的流行，并逐步取代模擬電視，是因為在當今許多的城市及周邊地區(qū)，容易受到眾多高層建筑物多徑干擾的影響，使接收效果惡化，如果想靠增加發(fā)射機的功率和天線的高度來解決此問題將是很不經(jīng)濟的、也是不現(xiàn)實的。而單頻網(wǎng)就是相鄰發(fā)射臺用同一個頻道發(fā)送同一個節(jié)目，這樣就很好地解決了接收問題。單頻網(wǎng)的優(yōu)點是：（1）節(jié)省頻率資源；（2）覆蓋范圍大。它是通過采用類似于蜂窩網(wǎng)的方式，以增加覆蓋范圍。
論文在查閱了大量有關文獻資料的基礎上，針對當前數(shù)字電視的發(fā)展情況以及單頻網(wǎng)技術的發(fā)展，做了一定的研究，并對其進行了仿真分析。論文中對MATLAB仿真環(huán)境方面的知識進行了簡單介紹。
關鍵詞：數(shù)字電視，地面廣播傳輸標準，單頻網(wǎng)
ABSTRACT
The technology of the digital TV is one of the technology with the fastest developing speed in the past 20 years. The digital TV Industry of our country is developing rapidly, Broadcast in digital television ground voice loudly, the era of replacing the analogue TV of the digital TV has already come. The so-called digital TV changes the anolog TV signals into the digital signal that a binary number show through taking a sample, quantizing and encoding, then go on various kinds of treatment, code for instance , modulate , transmit , store. The prevalence that the digital TV will be extensive , and replace the analogue TV progressively , because in nowadays a lot of cities and surrounding area, easy to influence by the fact that it is interfered directly that there are many numerous high level buildings, make reception worsen, is it is it increase power and height of aerial of transmitter solve problem this very uneconomical , unrealistic too to lean against to want. And the network is that the adjoint launching stand sends the same program with the same channel frequently only, well solve the problem of receiving like this. The advantage of the network is frequently only: (1) Save frequency resources; (2)The coverage is big. It is by way of adopting and is similar to the honeycomb network, in order to increase the coverage.
The thesis is directed against the development of the present digital TV and development of the technology of the network frequently only on the basis of consulting generously and about documents and materials, have done certain research, and has carried on emulation analysis to it. Have carried on the simple introduction to MATLAB artificial environment knowledge in the thesis.
Key words：Digital TV; DVB-T; SFN
部分參考文獻
[9] 佟學儉.OFDM 移動通信技術原理與應用.人民郵電出版社，2003
[10] 尤鞏圻.電視發(fā)射機與差轉機.中國廣播電視出版社，1994
[11] 樊昌信.通信原理.國防工業(yè)出版社，1993
[12] 郭梯云.移動通信西安電子科技大學出版社，2004
[13] 龔 波.QAM 調制信號測試原理.2002 年第六屆全國有線電視、衛(wèi)星、覆蓋、音頻、 視頻及記錄研討會論文集，2002
[14] 張 珉.DVB -T 開路數(shù)字地面電視.世界寬帶網(wǎng)絡雜志，2004
