時間代碼傳輸 的英文怎麼說

中文拼音 [shíjiāndàizhuànshū]
時間代碼傳輸 英文
time code transmission
  • : shí]Ⅰ名1 (比較長的一段時間)time; times; days:當時at that time; in those days; 古時 ancient tim...
  • : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
  • : Ⅰ動詞1 (代替) take the place of; be in place of 2 (代理) act on behalf of; acting Ⅱ名詞1 (歷...
  • : Ⅰ名詞(表示數目的符號或用具) a sign or object indicating number; code Ⅱ量詞1 (指一件事或一類的...
  • : 傳名詞1 (解釋經文的著作) commentaries on classics 2 (傳記) biography 3 (敘述歷史故事的作品)...
  • : Ⅰ動詞1 (運輸; 運送) transport; convey 2 [書面語] (捐獻) contribute money; donate 3 (失敗) l...
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  1. Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method

    其中對語音編解器的設計採用優化g . 729a達到設計要求,並在此基礎上加入g . 729b的靜音檢測模塊,以進一步降低網路帶寬;對回聲消除器的設計採用nlms演算法,通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計,信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號,信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計,除了類似雙音多頻的信號發生及頻率檢測設計外,還需要檢測信號持續,作者設計了一種基於匹配狀態表的方法以檢測信號持續
  2. The 3rd generation ( 3g ) mobile communications system and part of the 2nd generation ( 2g ) mobile communications use pn sequences or walsh codes as spread codes, and their system capacities are limited by the multiple access interference ( mai ) from asynchronous transmitted signals

    採用pn序列和walsh進行直序列擴頻的第三和部分第二cdma移動通信系統,其容量受到異步多址干擾的限制,其數據率因在n個片的內只能一個數據符號而受限。
  3. Because of the affection of noise and signal fading, in order to high data rate access and high quality, wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency. mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly, and reduce the multipath affection without spectrum band and power increasing. the 3th generation mobile communication wcdma is coming, with the purpose of putting mimo, stbc ( space time block coding ), space diversity into practice of wcdma systems, in order to lay the foundation of 3g toward 4g, this dissertation has done some research under this background

    在發射機和接收機使用多個天線進行數據的多入多出( mimo )技術,可以在不增加帶寬和天線發送功率的條件下,成倍的提高頻譜利用率,提高系統的通道容量,還可以抗多徑干擾。第三移動通信wcdma即將到來,為了將多天線技術( mimo ) ,空分集技術,空技術用到wcdma系統中去,為第三移動通信向第四移動通信系統平穩過渡奠定一定的基礎,需要做一些理論上的研究。
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