time demodulation 中文意思是什麼

time demodulation 解釋
時間解調
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  • demodulation : n. 【無線電】解調，反調制；檢波。
  1. It can realizes historical data repeat, time field analysis, spectrum analysis, time delay field analysis, axis orbit analysis, digital filter, corelation analysis, holographic spectrum analysis, demodulation analysis, fft delicate analysis and so on

    能實現歷史數據回放分析、時域分析、頻域分析、時延域分析、軸心軌跡分析、數字濾波、相關分析、全息譜分析、解調分析及fft細化分析等功能。
  2. The time - delayed correlation demodulation is established in order to suppress the noise and demodulating the signal

    Wigner - ville分佈計算時間長，不適于齒輪與滾動軸承的實時診斷。
  3. Non - coherent demodulation of bpsk signal based on time measuring

    信號非相干解調方法
  4. It emphasizes on the analyse of using syntony demodulation technology to final the long - distance coming train. at the same time, it gives a preliminary analyse in the signal for different cases, takes a research on the identified technology for the coming train, designs and assembles the hardware and software of this system. all of them have got past the test on the spot and got a satisfying result

    課題中的關鍵是如何得到列車運行信號的特徵規律，在本文中對這些列車接近信號的一些分析方法作了介紹，著重分析了採用共振解調技術發現遠程來車的信號，同時針對不同情況下的信號進行了初步分析，研究了來車的識別技術，並對系統的軟硬體進行了設計和組裝，通過了現場試驗，得到了令人滿意的結果
  5. 3. passive and active time - domain demodulation schemes were demonstrated based on a fiber bragg grating used as a tunable filter controlled by a piezoelectric stack, which was driven by an electrical sine wave signal. the measured strain applied on the sensor axially could be judged by observing the interval of the output between notches within a driving period in time - domain

    利用匹配濾波技術，分別採用無源和有源方式，藉助受pzt驅動的解調光柵，將待測應變信息變為時序負脈沖間隔的變化，利用常規的示波器觀測同一掃描周期中兩負脈沖在時域中間隔的變化來確定待測應變的變化。
  6. 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。
  7. Although stb just is a sort of terminal equipments of the tv signal transmission system, however pivotal technique involves the data demodulation, channel decode, transport stream de - multiplexing, audio and video signal decompression technique and real - time software technique with upriver data coding technique etc. therefore, software and hardware technology research and development of stb, which can increase usefulness with dependable of digital video signal and audio signal for study later make the theories preparation and backlog experience

    機頂盒雖然只是數字電視傳輸系統的終端設備，但所用到的關鍵技術涉及到數據解調、通道解碼、傳輸流的解復用、音視頻信號解壓縮技術以及實時軟體技術和上行數據的編碼技術等。因此，通過對機頂盒軟、硬體的研究開發，既能為以後研究如何提高信息傳輸的有效性和可靠性作理論上的準備，也為圖像信號和音頻信號的數字化處理積累經驗。
  8. After introduction of the whole fpga design of b3g downlink, chapter four schemed out every function module such as time synchronization, frequency synchronization, timing recovery, last frame detect, ofdm demodulation and rocket i / o interface etc. lots of structure schemes and simulation waves were presented

    主要包括時間同步模塊、頻率粗同步模塊、頻率精同步模塊、定時恢復模塊、尾幀檢測模塊、 agc / afc輔助模塊、 ofdm解調模塊和rocketi / o介面模塊等。
  9. Secondly, a dstft ( discrete short time fourier transform ) - based demodulation method for the 2fsk signal is studied and algorithms for symbol synchronization and symbol decision are analysed

    重點研究了基於離散短時傅里葉變換解調2fsk信號的方法，分析了幾種碼元同步演算法和碼元判決演算法。
  10. From theoretical analysis, we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value, detection or square in the process of generalized demodulation analysis, such phenomenon will result in some superfluous frequency composition on the frequency spectrum, which will puzzle the detec tion of mechanical vibration. if the sampling frequency is selected from a suitable range, the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling

    現有的解調分析方法存在以下三種局限性：將不包括調制信息（故障信息）的兩時域相加信號，也以其頻率之差作為解調信號而解出；廣義檢波濾波解調分析中，由於取絕對值、檢波或平方過程可能產生混頻效應，在解調譜中表現為無法分析的頻率成分，並由此推導出避免這種混頻現象的采樣頻率的選取范圍，從根本上避免此類誤診斷的產生；幾種細化解調分析新演算法中，因為無法在細化分析的選抽時進行數字低通濾波，有可能會出現調制頻率的高次諧波成分發生頻率混疊而反折到低頻部分的現象。
  11. This dissertation, basing on simulation, makes a deep research on simulating signal of gmsk ( gaussian filtered minimun frequency shift keying ) baseband modulation and demodulation in ais ( automatic identification system ) equipment. the technology related in the following makes the modulation and demodulation of baseband signal into realization by ti dsp, at the same time, provides a key technique to develop ais system inland

    本文著重對自動識別系統（ ais - automaticidentificationsystem ）設備的高斯濾波最小頻移鍵控（ gmsk - gaussianfilteredminimunfrequencyshiftkeying ）基帶調制解調信號進行了模擬研究，並在模擬的基礎上，在ti的dsp上實現了基帶信號的調制解調，為國內研製ais系統儲備了關鍵技術。
  12. A real time method for the calibration of the quadrature demodulation error of the rcs measurement radar receiver is proposed

    摘要針對脈間變頻rcs測量雷達採用模擬正交解調方法獲得同相分量和正交分量所引入的解調誤差，提出了一種實時校準方法。
  13. However, the high demand in frequency domain involves precise synchronization both in time and frequency domain. while because of the different channel characteristics in each channel, the receiver needs some mechanisms to characterize the channel effects in coherent demodulation

    然而，頻域的高要求對應于同步技術的高要求；另外，各個子通道不同的通道特徵，要求接收端相關解調用一定的機制來近似每個子通道的通道特徵。
  14. The code synchronization pulse brought from code synchrolock has the synchronization benchmark heart function in the demodulation processing. at the same time, it is the base of frame demodulation and datum processing

    位同步器產生的位同步信號起著遙測解調處理「同步基準」的關鍵作用，是后續幀格式解調和數據處理的基礎。
  15. Based on these, the monitoring system controls demodulation terminal and collecting record device to acquire signal and monitor vsat network effectively, and realizes real - time monitoring of kinds of operation signals

    因此，本文用了大量的筆墨來討論對目標網路各項信號指標的分析，這也是我們後面進行實時監測的前提。
  16. Especially, we analyze the signals of the vsat system, including the network controlling signal and kinds of operation signals. we make use of serial communication to control demodulation terminials and use kinds of advanced technology such as multi - thread in windows 98 to improve the real - time performance

    總體上看，在信號分析過程中，我採用的對于帶偽隨機交織的卷積碼的分析方法是有一定獨創性的，其間涉及了很多數學知識和通信原理。
  17. In the first place, start with theoretic model of distributed fbg strain - sensing network, sensing principle of fiber bragg grating is analyzed and sensing model created. on the basis of analyzing advantages and disadvantages of several familiar multiplexing and demodulation techniques, a mixture multiplexing method that combines optical frequency domain reflectometry ( ofdr ) and wavelength division multiplexing ( wdm ) is proposed to address fbg sensing array. at the same time, tunable narrow - band light source, which is composed of wide - band light source and tunable optical filter, is adopted to demodulate multiplex signals

    首先，論文從分散式光纖光柵應變傳感網路的理論模型入手，分析了光纖布拉格光柵的傳感機理，建立光纖光柵應變傳感模型；在分析比較了常見幾種復用技術和信號解調技術的優缺點基礎上，提出應用光頻域反射復用技術和波分復用技術相結合的混合復用方法來解決光纖光柵應變傳感網路的尋址問題，採用由寬帶光源和可調諧光濾波器組成的可調諧窄帶光源來解調復用信號，通過理論分析和實驗研究證實了系統方案的可行性。
  18. Through the analysis of advantages of several gmsk arithmetic and requirement of system processing, the base - band time lag demodulating algorithm based on quadrature demodulation and tms320vc5402 are selected for base - band processing

    通過分析gmsk幾種演算法的優越性以及系統對處理的需求，選擇基於正交解調的基帶時延檢波演算法以及tms320vc5402進行基帶處理。
  19. To the best of our knowledge, this is the first time that modulation classification algorithm considers quantificationally the relations between signal environment of modulation classification and that of signal demodulation

    據我們所知，本文是第一次定量地分析調制識別所需的信號環境與正常解調所需的信號環境之間的關系。
  20. The applied of demodulation with esa is advanced with which diagnosis precision has been improved, and real time diagnosis and accuracy ratio are satisfied on bearing production line. automatic classification model using integration of adaptive wavelet transform network and self - organizing feature map network is introduced. the strong suits of wavelet and neural network are made use of in this model and bearing fault classification is realized automatically

    第三章提出了一種自適應小波變換網路與自組織特徵映射網路（ self - organizingfeaturemapnetwork - somn ）集成的故障自動分類模型，該模型把小波的時頻局部化優點與神經網路的自學習、非線性映射能力有機結合起來，把高維測量空間中的非平穩信號復雜信息映射到易於分類的二維空間，實現了軸承故障自動分類。
分享友人
分享到 Line

分享到臉書