相位差調制 的英文怎麼說

中文拼音 [xiāngwèichādiàozhì]
相位差調制 英文
phase difference modulation
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 位 : Ⅰ名詞1 （所在或所佔的地方） place; location 2 （職位; 地位） position; post; status 3 （特指皇帝...
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 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...
  • 制 : Ⅰ動詞1 （製造） make; manufacture 2 （擬訂; 規定） draw up; establish 3 （用強力約束; 限定; 管束...
  • 相位 : phase position; phase
  1. 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。
  2. The three - order modulator has a 2 - 1 cascaded structure and 1 - bit quantizer at the end of each stage, the modulator is implemented with fully differential switched - capacitor circuits. and then, the discussion will begin by exploring the design of various circuit blocks in the modulator in more detail, i. e., ota, switched - capacitor integrator, quantizer, two - phase non - overlapping clock signal, etc., at the same time, these circuits will be simulated in spectre and hspice. at last, the whole cascaded modulator will do behavioral level simulation by matlab soft and simulink toolbox

    本論文中，首先介紹模數轉換器的各種參數的意義，以及一階sigma - delta調制器和高階sigma - delta調制器的原理;給出解決高階單環sigma - delta調制器不穩定性的方案，引入級聯結構調制器，特別針對級聯結構調制器中的失配和開關電容積分器的非理想特性進行詳細的討論;本設計的sigma - delta調制器採用2 - 1級聯結構和一位量化器，調制器採用全差分開關電容電路實現;同時對整個調制器的各個模塊進行了電路設計，包括跨導放大器、開關電容積分器、量化器、兩相非交疊時鐘等，並利用hspice和spectre模擬工具對這些電路進行模擬測試;最後，利用matlab軟體和simulink工具對整個級聯調制器進行行為級模擬。
  3. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  4. In order to make the sensitivity of 2 - demension accelerometer along the two main arbors almost identical, symmetric four - beam structure that embeds a double - sides interdigitated differential capacitive with puckered beam in two directions was used as sensitive component. in addition, the differential capacitive accelerometer fabricated by bulky silicon micromechanical technique has high sensitivity, wide measurement scope, less nonlinear error, and simple converting circuit. then, the structure parameters of the sensitive component were calculated and stimulated, which results in a set of the optimized structure design parameters, main fabrication procedure and several key fabrication technology

    為使二維振動傳感器在兩主軸方向的靈敏度大致相同，敏感元件採用高度對稱的四梁結構，其中每個軸向上均採用帶折疊梁的雙側叉指電容結構，採用體硅微機械工藝製作的高深寬比叉指電容式敏感元件，具有高靈敏度、寬量程、非線性誤差小、外圍電路簡單等優點;對設計的敏感元件結構參數進行了計算，並利用有限元法進行了模擬分析，根據模擬結果得出了優化參數;在確定敏感結構的基礎上，研究了敏感元件採用體硅微機械加工工藝製作的工藝流程和關鍵工藝技術;對敏感晶元內部的c - v介面電路進行了原理設計與分析，利用差動測量技術得到由振動引起的微小電容變化量，經c - v介面電路進行相位調制處理，然後通過解調輸出與加速度成正比的電壓信號。
  5. Then on the basis of calculating result from the prefigurative deviation control structure calculation, " rational data forecast processing about error adjust in prefigurative deviation control was made by the prefigurative theory of bp neural network and corresponding program and software matlab6. 1. at last via the data comparison with the practical survey data draw a conclusion : it is feasible for the construction prefigurative deviation control and error adjust used in pc rigid frame bridges to use the calculation model and program brought forward in this paper

    同時，在對預應力混凝土剛構橋施工過程線形預拱度控制的結構計算分析的基礎上，利用bp神經網路的預測理論和相應的程序及軟體包matlab6 . 1對預拱度控制中的誤差調整進行了較好的預測處理，通過與實際施工數據及成橋后測量結果作分析比較，得到結論：運用本論文的計算模型和程序對預應力混凝土剛構橋預拱度控制過程進武漢理工大學碩士學位論文行結構分析和誤差調整處理是可行。
  6. The main part and key technique of the cpa system is study : the generation of the femtosecond laser pulse is study, the modulation and maintenance of the ti : s laser is learned ; the types of the measurement for ultrashort laser pulse is generalized and the interferometric autocorrelation is expatiated ; the varieties of the stretchers is sum up and aberration - free stretcher is calculated and optimized to improve the stretching ratio ; the pulse selection is analyzed and a single pulse can be selected successful from the pulse train at a repetition rate of 82mhz ; the kinds of the amplifier in cpa system is gathered up, the eight - pass pre - amplifier and a good many effects in it is investigated. finally, the second, third and fourth - order dispersions in cpa system is analyzed systemicly, and the according means for dispersion compensation is worked out

    對cpa系統的主要環節及關鍵技術進行了研究：掌握了鈦寶石激光器的調節和維護技術，較深入地研究了飛秒激光脈沖產生的機理，其中對群速色散、自相位調制、自鎖模等問題進行了詳盡的分析；總結了超短激光脈沖的測量技術，重點研究了干涉自相關測量法；在總結展寬器類型的基礎上，對無象差展寬器進行了理論計算、優化設計，提高了展寬倍數；深入論述了脈沖列的選單問題，熟練掌握了脈沖選單技術。
  7. For the measurement of analog signals such as voltage and current of astg, a filter card for pre - disposing is designed, in order to improve real - time performance, algorithms for ac analog sampling is simplified, and a compensation algorithms for phase error due to sequence - sampling is brought forward. for the measurement of impulse - width signals such as rotor - speed and rotor - position - angle, an intelligent interface card based on isa bus is designed. all programs for measure and control based on c + + are compiled and debugged and the flow for system debugging is summarized

    為了提高實時性，對交流采樣演算法進行了簡化，並提出了由於非同步順序采樣所造成的相位誤差的補償演算法；針對轉速、轉子位置角等脈沖寬度信號的測量，深入分析了測量原理，設計了基於isa總線的智能介面卡；編制和調試了基於c + +的全部測量控製程序；完成了整個系統的調試，並總結了調試方法。
  8. In this scheme digital demodulator is used to detect ifog ' s signal, digital phase ramp modulator is used as feedback controlling and digital filter is used to limit noise and lower the bits of a / d ? d / a converters

    閉環方案中，採用數字解調方案進行信號檢測，採用數字相位階梯波調制技術進行反饋控制，採用數字濾波、數值濾波降低噪聲和消除a / d 、 d / a轉換死區誤差。
  9. By simulating mathematically on frequency and on space, we can find the average speed of space field and the average speed of frequency field that is weighted by amplitude, and analyse their relation, and analyse the meaning of space speed variance x and frequency speed variance v. in the fourth part, how to ensure the height of cloud is introduced, and basing on the theory of wind field continuity, the height updating quality controlling is introduced. in the fifth part, the system of cloud wind is introduced, we tracked cloud - motion of consecutive satellite images with one - minute interval by the 1 - d fourier analysis technique and the two - dim fourier analysis technique and the fft analysis technique, and dispose them with quality controlling. in the sixth part, we summarized our research and put up with shortages of this article

    模擬模塊內各點的速度線性變化時，得到空間域平均速度以及頻率域以振幅為權重的平均速度，分析了空間域平均速度和頻率域以振幅為權重的平均速度的關系，並揭示空間域的平均速度的標準差_ x和頻率域的振幅為權重的平均速度的標準差_ v的意義，以及它們之間的關系；第四章介紹了雲跡風系統的高度指定以及風矢高度的劃分，並根據風場連續性原理，介紹了高度調整法的質量控制；第五章介紹導風系統的流程，選擇了三個時刻的ir雲圖，分別用一維傅立葉相位法、二維傅立葉相位法和快速傅立葉演算法計算一個風場個例，並對所得風場進行質量控制，並給出風場圖；第六章進行研究總結，指出不足和有待于進一步研究之處。
  10. The results show that under the condition of the squeezing - power - number being an any even number or the pruduct of the squeezing - power - number and the total cavity - mode - number being an any even number, if some certain and fixed conditions are satisfied respectively by the initial phase of each mode in the state or the sum of the initial phase of each mode in the same state mentioned above, by the initial phase difference between any two components in the state, and by the sum of mean photon - numbers, which are modulated by the initial phase of each mode in the state mentioned, of all the single mode coherent states light field, the state can always display the effect of generalized nonlinear equal - power n - th power y - squeezing, or present the effect of generalized nonlinear equal - power n - th power h - squeezing, that changes alternatively and periodically

    結果發現：在壓縮次數取偶數或者壓縮次數與腔模總數這兩者之積取偶數的條件下，若各模的初始相位或者各模的初始相位和、態間的初始相位差以及受各模的初始相位調制的各單模相干態光場的平均光子數之總和等分別滿足一定的取值條件，則態| ~ （ （ 4 ） ） _ q的第一和第二這兩個正交相位分量總可分別呈現出周期性變化的、西北人學碩{ _學位論文摘要廣義非線性等冪次n次方y壓縮或者等冪次n次方h壓縮效應。
  11. In the part of the experimental designs, a experimental configuration of an unstable cavity by use of two bbo crystals compensating the walkoff effect and pumped by reflection is presented, and two set of controlling systems designs of open and closed loop are also presented ; we realized closed loop controlling system of bbo optical parametric oscillator tuning system, by using american general scanning inc. ' s controller to control bbo crystal ' s rotation, and scaled the output wavelength with charge coupled device

    在實驗設計上給出了利用兩塊bbo晶體補償走離效應返回式泵浦非穩腔的實驗設計，設計了開環和閉環兩套控制系統。通過使用美國通用掃描公司的掃描頭控制bbo晶體的轉動，用ccd對bbo - opo輸出波長進行標定，實現了bbo - opo調諧系統的閉環控制，相對波長調諧誤差小於0 . 04 ，並給出了354 . 7nm泵浦的類相位匹配bbo - opo輸出波長隨晶體轉角變化的理論和實驗曲線。
  12. Based on the statistics characteristic of prc - phase - modulation cw phase - array guidance radar, this thesis discusses the signal processing method and cfar algorithm of multiple repetition frequency pseudo - noise m - sequence phase coded signal

    本文結合偽碼調相連續波信號體制的特點，深入研究了多參差重復頻率偽隨機m序列相位編碼信號的處理方法和恆虛警檢測演算法。
  13. Three - phase full bridge controlled rectifier, filter circuit and the common loads " mathematics models are built and analyzed. according to the rate of the transition process, the controlled rectification power supply can be classified into fast response and slow response. based on identification of the transition processes using the slope method, the different fuzzy control strategy is adopted. the control method can meet the requirements of real time control and non - error regulation. the simulation results verify its practibility. after that. the design scheme based on dsp is introduced including the design of hardware and software flow chart. emc is an important aspect which can not neglected, so the designs of emc are summarized including hardware and software

    根據過渡過程的快慢將可控整流電源系統分為快響應過程和慢響應過程，本文在利用響應曲線斜率法辨以過渡過程的基礎上，分別針對快響應過程和慢響應過程採取了相應的模糊控制策略，以滿足快響應過程要求實時控制，快速跟蹤誤差變化，慢響應過程要求精確定位，無差調節的要求，模擬結果驗證了該方法的有效性，進而分析了用dsp實現該調節器的硬體電路和軟體流程的設計思路。
  14. In the second part, the necessity of employing differential demodulation in rapid changing channel was explained, performance of multiple symbol detection of mdpsk and decision feed back multiple symbol detection were analyzed. then we present a new differential demodulation algorithm. the decision data is used to recover the carry phase. given the same observation intervals, this demodulation algorithm has almost the same performance, but the receiver is much more simplified

    第二章首先指出了通道參數變化劇烈的情況下，採用差分解調的必要性；分析了多碼元差分解調和數據判決反饋解調演算法的性能和抑制噪聲的能力；在此基礎上提出了一種新的差分解調方案：利用判決數據輔助進行載波恢復，即在判決數據的輔助下，採用fir （ finantimpounsrespouns ）結構對載波相位進行預測的一種演算法，精心設計了該演算法的實現結構。
  15. It is one of the important parts for the control of hupqc to detect the reference compensation signal. the predictive strategy is presented based on wavelet theory, that means tracing the fundamental signal and replacing with sampling data every half cycle. the fundamental signal is forecasted step - by - step in a half cycle earlier

    補償指令信號的檢測是電能質量調節裝置的控制環節之一，本文提出了基於小波理論的預測檢測策略，跟蹤基波信號，以半周期為采樣更新速度，應用小波變換法對信號的基波分量進行遞推式預報，並取其與實時信號之差做為參考，然後產主與之大小相等、相位相反的信號作為hupqc的實時補償指令信號。
  16. Measurement accuracy of phase - shift laser range finders is up to millimeter level in large range through multi - frequency modulation and high precision phase difference measurement. however, laser range finders existing is not suitable for large range high speed tracing measurement for their complex multi - frequency modulation circuit and conflict between precision and speed in phase - shift measurement. in order to improve the large range measurement speed and accuracy, key technologies on multi - frequency modulation and high precision phase - shift measurement are deeply researched in this paper

    相位法激光測距採用多頻調制和高精度的相差測量技術可以在大范圍內實現毫米甚至更高精度的測量，但現有的測量裝置由於存在多頻調制電路復雜和沒有很好的解決相差測量的高精度和快速測量之間的矛盾問題，使得相位法激光測距很難應用於大范圍目標快速的跟蹤測量。
  17. Two wedge interferometers are designed that the thickness of one is higher than the other. so when the incident coherent light through the interferometers can acquire two fringe patterns which having space shift, but the incident incoherent light only result in consistent intensity signal. through a differentiating amplifier, two signals subtract which can eliminate noise of background and result in higher contrast ratio fringe signals. this method largely improves the system and the ability of detection. the spacing of line fringes is a function of incident laser wavelength, by analyzing, we can extract the wavelength of incident laser. the optical unit analyzing and results also simulated with matlab

    當背景光入射時，直接穿過干涉儀，僅發生強度的衰減，在兩個探測平面上產生幅度基本一致的灰度信號，通過差分放大器，相消為零，從而抑制了背景干擾。當激光信號入射，穿過干涉儀時受到調制，在探測平面上產生干涉條紋。通過所設計的存在平均厚度差的雙楔形干涉儀，兩路干涉條紋圖案出現相對移位：在兩個探測平面對應的位置上，一路出現亮紋，另一路出現暗紋。
  18. Optical phase retarders are not only important optical components in laser technique and polarized light technique fields, but also the basic optical phase modulators that introduce a phase shift between orthogonal and linearly polarized component when light transmittes through them

    光相位延遲器，是偏光技術和激光技術領域中極為重要的光學器件，也是最基本的光相位調制器。它能使透過它的振動方向相互垂直的兩束光波彼此之間產生一定的相位差，故稱光相位延遲器。
  19. It is found that whether the squeezing - power - number is an odd or even number, or whether the product of the squeezing - power - number and the total cavity - mode - number is an odd or even number, while some fixed conditions are satisfied respectively by the initial phase of each mode in the state or the sum of the initial phase of each mode in the same state, by the initial phase difference between any two components in the state and by the sum of mean photon - numbers, which are modulated by the initial phase of each mode in the state involved, of all the single mode coherent states light field, v the state can always display the effects of generalized nonlinear equal - power n - th power y - squeezing and unequal - power nj - th power y - squeezing, or present the effects of generalized nonlinear equal - power n - th power h - squeezing and unequal - power nj - th power h - squeezing, which changes alternatively and periodically

    結果發現：無論壓縮次數或者壓縮次數與腔模總數這兩者之積取奇數還是取偶數，只要各模的初始相位或者各模的初始相位和、態間的初始相位差以及受各模的初始相位調制的各單模相干態光場的平均光子數之總和等分別滿足一定的取值條件，那麼態| _ 5 ~ （ （ 3 ） ） _ q的第一和第二這兩個正交相位分量就可分別呈現出周期性變化的、廣義非線性等冪次n次方y壓縮和不等冪次n _ j次方y壓縮或者等冪次n次方h壓縮和不等冪次n _ j次方h壓縮效應。
  20. At the same time using the modulation ordering to unwrap the phase, which avoid error propagating to a large degree

    同時使用調制度排序演算法進行位相展開，這在很大程度上避免了沿位相不可靠點在進行位相展開時引起的誤差傳播。
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