https://scholars.lib.ntu.edu.tw/handle/123456789/121601
標題: | 小波轉換於多載波系統之應用 Discrete Multitone Modulation Using Wavelet |
作者: | 馮世邁 | 關鍵字: | transceiver;discrete multitone modu- lation (DMT);optimal DMT | 公開日期: | 31-七月-1999 | 出版社: | 臺北市:國立臺灣大學電信工程學研究所 | 摘要: | The DMT (discrete multitone modu- lation) technique has been widely applied to data transmission over fading channels of twisted pairs. It has been shown that the DMT system with ideal lters can achieve within 8 to 9 dB of the channel capacity of ADSL. The DFT based DMT system is proposed as a practical DMT implementation but its optimality is never asserted. In this report we will show that the DFT based DMT systems are asymptotically optimal although they are not opti- mal for nite number of channels. The DFT based DMT system and the DMT system with ideal l- ters achieve the same bound. However, for a mod- est number of channels the optimal transceiver can provide substantial gain over the DFT based sys- tem. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/20183 | 其他識別: | 882213E002080 | Rights: | 國立臺灣大學電信工程學研究所 |
顯示於: | 電信工程學研究所 |
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882213E002080.pdf | 244.83 kB | Adobe PDF | 檢視/開啟 |
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