group-frequency band 中文意思是什麼

group-frequency band 解釋
基團頻帶
  • group : n 1 群；批，簇。2 集團，團體，小組。3 【化學】基，團，組；（周期表的）屬，族。4 （雕塑等的）群像...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  1. The converter mainly accomplishes changing the c - band rf to intermediate frequency 70mhz, amplifying and gaining. the thesis includes r & d of local oscillator and group - delay equalizer. the thesis overall views the historical development future trend, introduces the theories, applications and characteristics

    該變頻器主要完成雙通道c頻段射頻信號到70mhz中頻的變頻、放大和增益控制等功能，本文的主要工作是下變頻器中的本地振蕩器和中頻群延遲均衡器兩部分的研製。
  2. Firstly, the differences between a qpsk system and a tcm - 8psk system, and the difficulties in the latter ’ s realization are considered in detail, including the frequency band utility, the group delay effects, the filters ’ implementation, the base band processing and some key technologies

    首先考慮了tcm - 8psk系統與傳統的qpsk系統的不同，以及在實際工程中會遇到的一些困難。包括從整個系統方面考慮的帶寬利用率問題、群延遲問題、濾波器問題和基帶處理等問題，以及實現這樣一個系統的幾種關鍵技術。
  3. After compared these methods, power spectral frequency band intensity, pca and linear network were choose to carry out the recognition system. finally, this paper provided software of gui as well as a group of simulink blocks to operate data and acquire results

    在綜合比較各種方法后，最終選擇功率譜估計頻帶強度為分類特徵， pca用於特徵提取，線性神經網路作為分類器用於系統的實現。
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