phase demodulation 中文意思是什麼
phase demodulation
解釋
鑒相- 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，...
- demodulation : n. 【無線電】解調，反調制；檢波。
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Phase demodulation method of optic fiber sensor based on labview
的光纖傳感器相位解調技術 -
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。 -
Eddy - current sensor conversion circuit consist amplification circuit, band - pass filter circuit, demodulation circuit, differentiation phase and data sampling circuit. these circuits are used to convert the test signal of eddy - current sensor to discrete signal tend to process. the microprocessor system that formed of dsp chip is used to data fitting of test system, data displaying and data communicating with personal computer, etc. the interference questions of hardware design and the measure of eliminating interference signal in the subject are introduced in the last of this chapter
硬體電路的設計主要分三大部分來實現：激勵源電路部分，由分頻電路和頻率合成電路組成，產生頻率穩定的激勵信號以確保檢測任務的正常進行；傳感器變換電路部分，由放大電路、濾波電路、檢波電路、鑒相電路和數據採集電路組成，主要將電渦流傳感器檢測線圈檢測到的信號變換成只含有被測信息的離散信號，易於后續電路處理；由dsp晶元構成的微處理系統，主要完成檢測系統的數據擬合、顯示及與主機通信等功能。 -
3. with comprehensive improvement of transponder including structural adjustment to lna ; optimization of ( phase locked loop ) pll filter ; structural adjustment to the transmitter and phase error adjustment to the intermediate frequency demodulation circuit, we have successfully enhanced sensitivity, expanded dynamic range, increased transmitting power and improved the spectrum purity ; decreased capture time for pll ; improved the signal quality after demodulation ; reduced its volume and power consumption. 4
3 、對通信機的全面改進，包括lna結構的調整、鎖相環環路濾波器的優化、發射部分結構的調整以及中頻解調電路的相差調整，提高了系統的接收靈敏度、改善了本振的頻譜純度、減少了鎖相環的鎖定時間、使中頻解調后的信號質量大為提高，同時還減少了體積、節約了系統的功耗。 -
Fiber - optic fabry - perot sensor is a kind of high precision interferometric fiber - optic sensor, so this kind of sensor has a bright future. this sensor can be classified into 3 kinds of sensors by their demodulation device. these are intensity modulation / demodulation fiber - optic fabry - perot sensor, phase modulation / demodulation fiber - optic fabry - perot sensor and white - light interferometer modulation / demodulation fiber - optic fabry - perot sensor
按照信號解調裝置的不同該種傳感器可分為三類：強度調制解調型、相位調制解調型和白光干涉儀調制解調型光纖fp傳感器，其中后兩種採用寬光譜光源，是白光干涉型光纖fp傳感器。 -
A demodulation method of gear phase modulation vibration signal based on spatial sampling
基於空間采樣法的齒輪調相振動信號解調 -
Relative phase demodulation technique in frequency domain in projected grating phase method
雙頻投影柵線法的改進 -
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。 -
The experiments indicate that the new mdrlg has high precision and the phase - demodulation and frequency stabilizing circuits work fine and stably
測試結果表明新研製的機抖陀螺有較高的精度，鑒相解調正確，穩頻電路性能較好、工作穩定。 -
The reason for the problem, which consists in some error of the old phase - demodulation circuit, is found out by computer simulation in this dissertation. then a new phase - demodulation circuit is designed and the problem settled
本文通過對機抖陀螺進行計算機模擬，查明了問題產生的根源在於原有鑒相電路設計有誤，並設計了新的鑒相電路，從根本上解決了該問題。 -
Thus the principle to deal with the four basic waveforms is put forward and a new phase - demodulation circuit is designed. experiments for the two circuits on same gyros are made and they indicate clearly that the mdrlg ' s null - shift problem consists in the faultiness of the old phase - demodulation circuit
在此基礎上，提出了處理計數信號過鎖區波形的基本原則，進而設計了新的鑒相電路，並在同一陀螺上對兩鑒相電路進行了對比實驗。 -
Firstly, computer model of mdrlg is set up for simulation purpose. by simulation about the two output signals of mdrlg, four basic waveforms between the two signals in lock - in area are found out and the fact is discovered that the old phase - demodulation circuit introduces errors when it is used for demodulating two of the four basic waveforms
本文首先建立了機抖陀螺的計算機模擬模型，利用該模型對陀螺兩路計數信號及原有鑒相電路進行了模擬，發現兩路計數信號過鎖區時存在四種基本波形，且原有鑒相電路對其中兩種波形產生鑒相誤差。 -
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。 -
This paper explicitly describes the optical measurement of the electric parameters in the high - voltage electric power system, and an optic fiber large current sensor based on farady magnetooptic effect and an optic fiber high voltage sensor based on the linear transformation characteristic of led are developed from research on both theory and experiments. by combining the two sensors to form a synchronous system, the task of harmonic analysis, phase demodulation, power and wattless power computation is accomplished, which helps to monitor and control the electric power system
本文詳細論述了電力系統高壓電網電參量的光學測量的一種實現方法，從理論和實驗兩方面研究了基於farady磁光效應的光纖電流傳感器及基於led線性電光轉換特性的光纖電壓傳感器，並聯合兩種傳感器形成了電壓、電流的同步測量系統，實現了諧波分析、鑒相及有功、無功功率的計算，可對電能質量進行監控。 -
We propose a chaos - based generation of the random ppm - ps signals, design and implement a generator of the ppm - ps signals. we introduce an if sampling technique and simulate the performances of digital demodulation techniques of using hilbert filters, sine filters, bessel filters and poly - phase filters. the poly - phase filtering method can achieve the higher mirror - frequency rejection ratio by using the low order filters
介紹了中頻采樣技術，並對希爾伯特濾波法、辛格內插函數修正、貝賽爾函數插值法及多相濾波法等數字解調演算法進行了計算機模擬和性能比較，指出多相濾波法能以較低的階數實現較高的鏡頻抑制比。 -
Secondly, the noise of the system is analyzed. to improving the signal - to - noise of the system, design the phase sensitive demodulation system which contains three parts : signal channel, reference channel and correlation demodulator
其次，分析了系統各部分的噪聲，以提高系統信噪比為原則，設計了由信號通道、參考通道、相關解調器三部分組成的相敏檢波系統。 -
Chapter five highlighted on some applications of surface acoustic wave ( saw ) filters that have been used in mobile and wireless communications, we have explained two applications, binary phase - shift keying ( bpsk ), and differential phase - shift keying ( dpsk ), we also proposed an application to implement the cck codewords and the cck demodulation using saw matched filter
第五章研究了聲表面波濾波器在移動通信、無線通信中的應用，主要介紹了三種應用：二進制相移鍵控（ bpsk ） 、差分相移鍵控（ dpsk ） ，以及用saw匹配濾波器實現cck調制和解調。 -
Following this, the thesis research digital demodulation of qpsk and analyze the digitalizing means of key module. digitalizing demodulation arithmetic is given. the thesis also researched in phase ambiguity of coherent demodulation, and then brings forward a new method for settling phase ambiguity
而後研究了qpsk的數字化解調，分析了關鍵模塊的數字化方法，給出了數字化解調演算法，並研究了相干解調中的相位模糊問題，提出了一種解決相位模糊的新方法。 -
Under the same restriction of a universal sdr hardware platform, the demodulation of linear modulated waveform, continuous phase ( no - linear ) modulated waveform, and multi - carrier modulated waveform, are investigated. corresponding to those three modulation schemes, bust mode mpsk, omsk, and ofdm signals are taken as the examples to implement a multi - mode sdr receiver, and results are presented
本文在軟體無線電通用硬體平臺結構下，分析了線性調制方式、非線性連續相位調制方式和多載波調制的軟體接收機實現問題，分別以突發模式mpsk調制、 gmsk調制、 ofdm調制模式為對象，給出了具體的多模式接收實現方法和模擬結果。 -
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。
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