phase quadrature 中文意思是什麼

phase quadrature 解釋
方照
  • phase : n 1 形勢，局面，狀態；階級。2 方面，側面。3 【天文學】（月等的）變相，盈虧；【物、天】相，周相，...
  • quadrature : n. 1. 【數學】求積分，求面積。2. 【天文學】矩；（月的）上[下]弦；方照。3. 【物理學】正交；轉象差；九十度相位差。
  1. Pll - qpsk, phased - locked loop quadrature phase shift keying

    鎖相環四相相移鍵控
  2. Pll - qpsk phased - locked loop quadrature phase shift keying

    鎖相環四相相移鍵控
  3. Quadrature differential phase shift keying qdpsk

    四相差分相移鍵控
  4. Quadrature differential phase shift keying

    四相差分相移鍵控
  5. In the thesis, a signal processing scheme of polarization - insensitive fiber optic michelson interferometric magnetic sensor is described : making the interferometer work near the quadrature with closed loop controlling working point method, the fundamental frequency component of the magnetic field sensing signals can be detected to measure the input direct current ( dc ) magnetic field by phase sensitive demodulation

    本文主要介紹了偏振無關光纖michelson干涉型微弱磁場傳感器信號處理的方案:通過閉環控制工作點演算法使干涉儀工作在正交工作點處，再利用相敏檢波演算法提取傳感器輸出信號的基頻分量，以測量直流磁場的大小。
  6. When the nopa was operated at amplification, the epr states with amplitude - quadrature correlation and phase - quadrature anticorrelation were generated firstly in 1999. the product of the amplitude and phase quadrature correlation degrees was 0. 727 0. 004 < 1 ; after the laser source was reconstructed, the epr beams with amplitude - quadrature anticorrelation and phase quadrature correlation were obtained in 2001 and the product of the correlation degrees was 0. 332 0. 003 when the nopa was operated at deamplification. 2

    參量放大過程產生的糾纏光束具有正交振幅正關聯、正交位相反關聯的特性，乘積關聯度為0 . 727 0 . 004 1 ；改進光源后，利用參量反放大（ deamplification ）過程產生了正交振幅反關聯、正交位相正關聯的明亮epr糾纏光束，乘積關聯度達到0 . 332 0 . 003 1 。
  7. The image rejection mixer is composed of two unit mixers, rf is halved as two parts in quadrature ; lo is halved as two parts in phase ; if is synthesized in quadrature

    鏡頻抑制混頻器包含兩個單元混頻器，射頻正交功分，本振同相功分，中頻正交合成。
  8. Presents the development of modern signal processing techniques, a new implementation method which realizes quadrature coherent detection by direct sampling of if signal generated during the implementation of traditional quadrature coherent detection with analog elements in the form of two parallel baseband channels where in phase ( i ) and quadrature ( q ) components of ceived if singnal where, the imperfect matching of the separate channels due to the analog elements results in high phase and amplitude which meets the needs for high performance radar signal processing, the elementary principles and the implementation process for each method and concludes from simulation results to compare their features and application conditions that the new approach can satisfy of the requirements of high performance sp

    針對近年來提出的通過直接中頻采樣來實現正交相干檢波的方法，分析了其基本實現原理，並用統一的觀點解釋了迄今為止國內外基於此提出的各種實現方法；對每一實現方法的基本原理和實現過程都作了分析，並給出了計算機模擬結果；在此基礎上比較了各方法的性能指標及適應條件.理論分析和模擬結果證明，這一方法完全可以滿足高性能信號處理的要求
  9. First of all, the mathematical development and extensive computer simulation are used to analyze the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation

    首先對回波正交雙通道幅相不平衡對氣象回波譜估計的影響進行了詳細的理論推導和計算機模擬。
  10. This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system

    本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。
  11. Analyze, design and simulate the digital down - convert frequency. first, the analogue if signal is converted to digital if signal in one a / d convertor which used passband sampling theory. the digital if signal is then passed to a pair of digital mixers operating in phase quadrature for mixing the if signal to baseband signal

    首先利用帶通采樣定理對中頻模擬信號進行a / d變換后將其混頻到基帶，然後用平方根升餘弦滾降濾波器同時完成低通濾波和匹配濾波雙重作用，以提高解調器的效率。
  12. The theoretic analysis and computer simulation results reveal that this influence ca n ' t be ignored. because the if sampling and digital demodulation technique can improve amplitude and phase unbalances of in - phase and quadrature channels, we apply it in the pd weather radar signal processing system and select several digital demodulation algorithms, which are easier to implement, for this system

    由於採用中頻采樣和數字解調技術能有效地提高正交解調兩路的幅相一致性，本文將中頻采樣及數字解調技術應用到脈沖多普勒氣象雷達信號處理系統中，並結合氣象信號的特點選擇了適合工程實現的中頻采樣及數字解調演算法。
  13. In quantum states which have squeezing effect, one quadrature phase may have reduced quantum fluctuations compared with what the relative quadrature phase have in coherent states, which makes it applied widely in optical communication systems, and so on. therefore, squeezed state of the radiation field is still a central topic in quantum optics

    由於光場壓縮態在其某一正交分量具有比相干態更小的量子噪聲，因此，在實際應用中，如果用這一分量傳遞信息，則可得到比相干態光場更高的信噪比。
  14. In particular, squeezing effects, due to the quantum fluctuation of one quadrature phase smaller than that in coherent state, can be used in optical communication and other fields

    特別是具有壓縮效應的量子態，由於在壓縮態中光場振幅的量子漲落小於相干態相應的量子漲落，使得它在光通訊等領域有著廣闊的應用前景。
  15. Ijf - oqpsk is actually to modulate the ijf codes by the offset quadrature phase shift keying

    Ijf ? oqpsk實際上是對ijf信號再進行正交四相相移鍵控的調制技術。
  16. The method based on quadrature demodulation is studied and the equations used to calculate the frequency, magnitude and phase ( difference ) of signals are given. the author has designed two kinds of low pass filters ( lpfs ) and has studied two kinds of frequency - tracking methods

    研究基於正交解調的科里奧利質量流量計信號處理方法，給出了同時求出信號的頻率、幅值和相位（差）的公式，設計兩種濾波器，研究兩種跟蹤方法，並進行模擬和比較，得到較好的方案。
  17. Quartered demodulating technology is widely applied in modern if receiver because it can extract phase and amplitude information from the received signal. the quadrature demodulating component in traditional receiver was implemented with analog circuits

    在現代雷達系統中，寬帶雷達信號應用的越來越廣泛，相應地，通過數字信號處理的方法來處理超寬帶雷達信號，需要高速的數據採集系統來提取信息。
  18. The voltage - controlled oscillator and the dual - modulus prescaler are the most crucial blocks in the pll frequency synthesizer. two kinds of voltage - controlled oscillator ( the quadrature voltage - controlled oscillator based on symmetrical spiral inductors and differential varactors, and the voltage - controlled oscillator with wide tuning range based on mos varactors ) and two kinds of prescaler ( the prescaler using phase - switching techniques, and the prescaler using dynamic circuit techniques ) are proposed. then, the complete pll frequency synthesizer is implemented, in which

    壓控振蕩器和雙模預分頻器是鎖相環型頻率合成器中最關鍵的兩個模塊，本論文分別實現了兩種類型的壓控振蕩器（採用對稱螺旋型電感和差分二極體型容抗管的正交壓控振蕩器和使用mos型容抗管的大調諧范圍壓控振蕩器）和兩種類型的雙模預分頻器（使用相位開關技術的雙模預分頻器和使用動態電路技術的雙模預分頻器） 。
  19. Differential quadrature phase keying

    差分四相相移鍵控
  20. This project study the all - digital modulation and demodulation of / 4 offset differentially encoded quadrature phase shift keying ( / 4 - dqpsk ). then use / 4 - dqpsk digital modulation and baseband differential demodulation technology to implement digital signal transmission. the bite rate is 500kb / s and the intermediate frequency is 2mhz

    本課題對/ 4 - dqpsk的全數字調制解調技術進行研究，利用/ 4 - dqpsk數字調制和基帶差分解調技術實現數字信號的傳輸，實現傳輸碼率500kbps ，調制中頻2mhz 。
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