modulation envelope 中文意思是什麼

modulation envelope 解釋
調幅包跡
  • modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
  • envelope : n. 1. 信封；紙袋；包封，封皮。2. 殼層，外殼。3. 【數學】包（絡）線；包跡。4. 【航空】氣囊；【天文學】包層；【生物學】包膜，包被。
  1. Evidently, there is another motion to be concerned with and that is the propagation of the modulation envelope.

    顯然，還應當考慮另外一種運動，那就是調制包絡的傳播。
  2. From the analyzing, there is 3 db envelope fluctuation of this modulation technique

    通過分析，得到這種調制方式的已調波包絡仍有3db起伏。
  3. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。
  4. The method can measure the following parameters, ( pulse attitude ) pa, ( pulse width ) pw, ( time of approach ) toa, snr, ( radio frequency ) rf, pulse envelope characteristic parameters and intra - pulse modulation parameters with a high precision and a high discrimination

    該演算法能夠分析雷達信號的脈沖脈幅、脈寬、到達時間、信噪比、載頻、脈沖包絡特徵參數和脈內調制特徵參數。
  5. This thesis studied and introduced the method of msk modulation. it is a special type of constant envelope - continuous phase fsk

    本文研究並介紹了msk調制方式，它是包絡恆定相位連續的頻移鍵控的一種特殊情況。
  6. The advantages of the modulation method omsk ( the gaussian pre - filtered minimum shift keying ) include bandwidth efficiency and constant envelope

    Gsm系統中採用了gmsk調制方式， gmsk調制恆定包絡，具有較高的頻譜利用率。
分享友人
分享到 Line

分享到臉書