調變載波 的英文怎麼說

中文拼音 [diàobiànzǎibō]
調變載波 英文
modulated carrier wave （mcw）
  • 調 : Ⅰ動詞1 （配合得均勻合適） harmonize; suit well; fit in perfectly 2 （使配合得均勻合適） mix; adju...
  • 載 : 載Ⅰ名詞（年） year : 一年半載 six to twelve months; six months to a year; 三年五載 three to five ...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 載波 : signal carrier; carrier wave; carrier: 3路載波 three channel carrier載波傳輸 carrier transmission...
  1. This system of modifying the carrier waves is called "amplitude modulation, " or "am".

    這個改變載波的系統稱為「振幅調制」或縮寫為「AM」。
  2. The power of the modulated carrier wave is increased by the rf power amplifier

    射頻功率放大器增加了調變載波的功率。
  3. In communications, the amplitude variations of an amplitude modulated carrier wave

    在通信技術中，調幅載波的幅度變化圖。
  4. This system of modifying the carrier waves is called " amplitude modulation, " or " am "

    這個改變載波的系統稱為「振幅調制」或縮寫為「 am 」 。
  5. In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage

    我們對兩種正交調制方式（ 16qam和4 - qpsk ）進行了模擬工作並給出了模擬結果，同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試；然後在基於軟體無線電思想的數字處理平臺（該數字處理平臺實現了中頻數字化）上用dsp軟體完成了載波的相位跟蹤。
  6. The potential applications of amr include both civil and military communication, especially non - cooperative communications and communication confrontation, such as identifying signals, supervising signals, distinguishing interference, electronic confrontation, analyzing military threat, etc. on the basis of our analysis to the existing research on feature abstraction, the related feature abstraction methods are optimized in this paper, resulting several effective methods such as the feature abstraction based on transformation domain, stepped voltage level analysis, normalized carrier - free spectral energy analysis, squared signal and fourth powered signal analysis, etc. both the decision theory based on recognition algorithms and the artificial neural network ( ann ) based on recognition algorithms is analyzed, and the former is selected as it is more appropriate for this research

    調制類型的自動識別廣泛應用於民用通信與軍用通信，尤其是對于非合作性通信、通信對抗，比如：信號確認、信號監控、干擾辨識、電子對抗、軟體無線電、電子救援、通信對抗、軍事威脅分析等。本論文在分析現有研究的基礎上，借鑒了已有的特徵提取方法，對相關調制類型特徵提取方法進行了優化，使用了一些有效的方法，如基於變換域特徵提取方法、梯層電平分析方法、剔除載波后的歸一化頻域能量分析方法、信號平方后的頻譜分析方法、信號四次方后的頻譜分析方法等。通過對基於決策理論和基於人工神經網路兩種識別演算法進行分析，本論文選擇了較適合的基於決策理論的識別演算法。
  7. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
  8. Due to the complexity of the structure and control of cycloconverter - type three - phase hf link inverter for soft - switching based on phase - shift - controlled full - bridge mode, a simple and optimized vvvf control strategy is proposed. this control strategy includes : produced pwm by space voltage vector ( svm ) and equivalent carrier frequency fe = 1 / te are introduced into the pdm control of the cycloconverter ; softened equivalent pwm wave is generated at the notches of hf voltage pulses ; the harmonious control between regulating pulse width by phase - shifted angle and regulating voltage of equivalent pwm is to minimize the harmonics content of output voltage of the inverter

    西安理工大學博士學位論文針對這種前級移相全橋軟開關周波變流型三相高頻鏈逆變器結構和控制的復雜性，提出了一種實現簡單而整體優化的vvvf控制策略:將空間電壓矢量產生p姍的方法svm和等效載波頻率fe = 1 / te引入到周波變流器的pdm控制;按高頻電壓脈沖前後沿軟化等效p翎波;用移相調節高頻脈沖寬度和等效p姍調壓協調控制逆變器輸出電壓，在滿足輸出電壓條件下使諧波最小。
  9. The system can generate three - phase spwm pulses and has following characters : the range of modulation frequency is from 0 khz to 4 khz. and can be divided to 7 classes to control. the carrier frequency may be selected up to 24 khz, and can be divided to 8 classes to control ; rotational frequency is defined to 16 bits

    該系統能產生三相六路正弦脈寬調制（ spwm ）波形;調制頻率范圍為0 4khz ，分7級控制; 16位的速度控制解析度;載波頻率分8級控制，最高可達24khz ;系統介面兼容intel系列和motorola系列單片機;該系統控制簡單、精確，易修改，可現場編程;同時具有脈沖延時小、最小脈沖刪除、過壓和過流保護功能等特點，可應用於pwm變頻調速系統的全數字化控制。
  10. This d format can show the range of the data intuitively and express the real time data, which improves the speed and precision of svpwm arithmetic greatly. the ratio of carrier wave is increased and the blend of current is reduced, as a result the performance of the system is ameliorated. this thesis project has finished the debugging of the ac motor control system, and the result shows that hardware and software of the designed system is in reason

    在實現svpwm演算法的匯編程序中採用了一種新型的d定標法對標幺化的數值進行定標，這種d定標法能直觀的表示數值的大小范圍，可以實時的對數值進行定標，提高了svpwm演算法執行的精度和速度，增加了逆變器的載波比，減少了電流諧波，因而改善了交流變頻調速系統的性能。
  11. Filter poly - phase decomposition method is adopted in this dissertation. the partition of the tuning channel according to the digital mixing sequence, and the digital down - conversion by means of decimating first, the low - pass filtering and mixing realize efficiently the down - conversion of the variable carrier frequency band - pass signal

    本文採用濾波器多相分解方法，按數字混頻序列劃分調諧通道，使用先抽取，后低通濾波，再混頻的數字下變頻結構，高效實現了變載頻帶通信號數字下變頻。
  12. In the second chapter, equivalent circuit of the eddy current sensor is firstly analyzed. based on that, the carrier signal generating circuit that is realized by the lc periodic circuit is introduced, thus, the carrier signal of standard frequency is obtained through the trimming capacity. subsequently, the disc type rotational armature generator and the rotational coupling transformer are separately leaded in to realize the power supplies of the carrier signal generating circuit and output of the measuring signal

    在傳感器設計一章中，首先對渦流傳感器進行等效電路分析，在此基礎上分析了由電感、電容諧振電路構成的載波信號發生電路，並通過微調電容獲得了標準頻率的載波信號；接下來提出了採用盤式旋轉電樞發電機解決載波信號發生電路電源供給問題的方案，同時通過旋轉耦合變壓器的引入，使得測量信號輸出問題很好地解決；本章最後給出的一組實驗曲線充分說明了這一方案的可實現性。
  13. With the support of hardware devices such as dsp chip, this arithmetic has effective application on complicated practice source coding. this paper alse applies wavelet to multicarrier modem / demodem transfer. the use of the induced wavelet package improves this arithmetic to search best wavelet package basis, and boosts up the support to multirate

    本文同時應用小波變換到多載波調制解調傳輸方面，通過推導出誘導小波包，改進最優小波包基搜索演算法，增強了對多碼率業務的支持性，在多載波傳輸系統中，是有效的提高信干比的方法。
  14. A novel sine - triangle modulation method based on equivalent circuit model for three - level pwm voltage source inverter

    基於等效電路模型的新型三電平逆變器載波調制方法的研究
  15. This article describes the plc ’ s using enviroment and the users ’ needs in details, and then tells the differences between the dplc and the troditional plc. it also describes how to decimation and compress the tele - voice, how to deal with the data tunnels, and the multiplex data through the the line which ’ s bandwidth is changeable between 10. 8bps and 28. 8kbps this project uses the programmable vopp chips, the cpld for bus controlling, the fpga and the mcu with high processing ability. all of these ensure the high ability to process the signals and the operations

    本文詳細介紹了高壓電力線載波機的使用環境和用戶需求，全數字電力載波機和傳統模擬載波的的差異;按電力調度的需求設計完整的兩路語音、兩路數據的電力線載波通訊機。詳細描述電話語音的采樣，壓縮;數據通道的處理;及在10 . 8kbps 28 . 8kbps可變線路速率通道上的數據復接處理。從實現方法上看，該項目採用專用可編程vopp語音處理晶元， cpld晶元做為總線控制，大規模fpga集成電路，高處理能力的mcu 。
  16. This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits

    本文採用了一種基於fpga的通用數字調制解調方案，該方案在調制端採用了正交平衡調制技術，在解調端採用了中頻帶通采樣、數字匹配濾波、延時差分解調等技術，直接在中頻上進行數字信號處理，不需要進行下變頻，也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。
  17. A modulated signal of tria ( tt / pw ) added by a normal noise. is demonstrated for 2 - d dependence of the waveform on time and trials and 2 - d dependence of spectrum on frequency and trials to show different time domain and frequency domain properties of a random process including noise and signal

    以三角波電壓訊號加上準常態雜訊乘以無雜訊載波之調變訊號為例，圖示含有雜訊電壓訊號其波形隨時間及試驗之二維變動及頻譜隨頻率及試驗之二維變動，顯示雜訊與訊號之隨機過程在時域與頻域之不同特性。
  18. A modulated signal of eexp ( 2 * tt / pw ) added by a zero mean uniform noise. is demonstrated for 2 - d dependence of the waveform on time and trials and 2 - d dependence of spectrum on frequency and trials to show different time domain and frequency domain properties of a random process including noise and signal

    以雙邊遞減波電壓訊號加上均勻雜訊乘以無雜訊載波之調變訊號為例，圖示含有雜訊電壓訊號其波形隨時間及試驗之二維變動及頻譜隨頻率及試驗之二維變動，顯示雜訊與訊號之隨機過程在時域與頻域之不同特性。
  19. After analyzing the difference of damper ' s energy dissipation, between two waveshapes of a simple loop load test, a comprehensive method for the capacity assessment of damper ' s power dissipation suggested

    通過對單調加載中因加載波形不同而導致耗能的變化的分析，提出了阻尼器耗能性能的綜合評價方法。
  20. Based on the modularized asi, cascade inverter topology structure and modulation mode is introduced in this paper. comparing with several control strategies such as single closed - loop feedback and dual close - loop instantaneous value feedback, the voltage - current dual closed - loop control strategy, which is the voltage effective value feedback and inductance current instantaneous value feedback, is adopted

    針對級聯逆變器討論其pwm調制技術，在比較幾種pwm調制技術的基礎上，對該級聯逆變器採用倍頻載波移相調制技術，其輸出不含載波諧波，邊頻諧波次數比二階和三階調制的邊頻諧波次數提高一倍，等效開關頻率也提高一倍。
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