| DC 欄位 |
值 |
語言 |
| DC.contributor | 電機工程研究所 | zh_TW |
| DC.creator | 黃敏瑞 | zh_TW |
| DC.creator | Ming-Ruan Huang | en_US |
| dc.date.accessioned | 2001-6-19T07:39:07Z | |
| dc.date.available | 2001-6-19T07:39:07Z | |
| dc.date.issued | 2001 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=88521058 | |
| dc.contributor.department | 電機工程研究所 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.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。 | zh_TW |
| dc.description.abstract | 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 。 | en_US |
| DC.subject | 調變 | zh_TW |
| DC.subject | 16QAM | en_US |
| DC.subject | modulation | en_US |
| DC.subject | modulator | en_US |
| DC.title | 16QAM調變系統 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | 16 QAM Modulator | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |