載頻指配 的英文怎麼說
中文拼音 [zǎibīnzhǐpèi]
載頻指配
英文
carrier frequency assignment-
This article takes hanging off and wide fluctuation of transmition velocity of adsl as example, then analysis centers on the discerte multiple tone and the principle of channel load assignation. from analysis above article points out the root of adsl being sensible of noise signal. at last, reserches effects that window function and barrier effect on frequency and adopts fft to work out the noise power of adsl
本文以電信現在推出的adsl傳輸中鏈路經常掉線和傳輸速率經常大范圍波動為例,重點分析了adsl所使用的dmt調制方式和注水演算法分配通道載荷方式原理,由此指出adsl對噪聲信號敏感的根源,在得到問題的根源之後,分析了窗函數和柵欄效應對頻譜的影響,採用fft方法計算adsl線路的噪聲功率譜,為adsl線路測試提供了可靠的理論依據。In april, the asiasat 4 satellite which carries the four broadcasting satellite service ( bss ) channels assigned to hong kong was successfully launched
在四月,載有指配予香港的四條衛星廣播服務頻道的亞洲四號衛星成功發射。
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