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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/9194


    Title: 16QAM調變系統;16 QAM Modulator
    Authors: 黃敏瑞;Ming-Ruan Huang
    Contributors: 電機工程研究所
    Keywords: 調變;16QAM;modulator;modulation
    Date: 2001-06-19
    Issue Date: 2009-09-22 11:42:54 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本論文主要是要架設一套資料量為6MHz,載波為50MHz的16QAM調變器,是為了配合數位DTV在無線傳輸方面的應用。因數位DTV系統,其每個channel頻寬為6MHz,而其頻段由60MHz至800MHz皆有,並且以16QAM為調變的方式,每6MHz惟一個頻寬。因此規格為6MHz為頻寬,50MHz為載波頻段,本文在analog device公司出品的AD9853,以滿足本文所要求的規格。 而此顆IC為可程式化的,寫入的方式是藉由I2C通訊協定,由於這顆IC有許多的功能,包括Preamble,Randomizer,Reed-Solomom Encoder及FIR Digital Filter,其載波的頻段可調,data rate的速度可調等等,所以想要AD9853發射出什麼信號,就需要用I2C的方式來寫入。 為實現I2C通訊協定,本文採用了兩種方式,1. PIC(單晶片)來實現 2.電腦並列阜加上74系列的控制IC來實現。單晶片的傳輸速度較快,而電腦並列阜的傳輸速度則較慢。 Because people need more and more service in wireless communication,so we have to raise our frequency to fit these requirement。For example,DTV(digital television ) is a kind of system that uses 28GHz in wireless communication,and it has many channels in 50MHz~900MHZ,each channel has 6MHZ data rate。The modulator for DTV is 16 QAM,and aspect of this thesis is 16 QAM modulator。 We use a chip is analog device AD9853,for this purpose,It's Function include : Preamble , Reed-Solomom Encoder,Randomizer,16 QAM Modulation and FIR Digital Filter。We setup it according to its and program it by I2C communication algorithm which uses PIC(peripheral interface controller) and parallel port to implement 。
    Appears in Collections:[電機工程研究所] 博碩士論文

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