frequency jitter 中文意思是什麼
frequency jitter
解釋
頻率波動-
When the atp system is setup on a moving bed, movement and angular jitter of the bed will cause system line - of - sight high frequency jitter
當捕獲、跟蹤與瞄準系統安裝于運動平臺上時，運動平臺的運動及抖動將導致系統視軸存在高頻的抖動。 -
For the characteristic of low frequency movement of the target and high frequency system line - of - sight jitter, basic theory of compound axes line - of - sight stabilization system with line - of - sight pointing reference unit ( lospru ) is analyzed
依據目標低頻運動和儀器視軸高頻抖動的特點，分析了使用視軸瞄準參考器的復合軸視軸穩定系統的基本原理。 -
Recently, we propose that super - gaussian sliding - frequency filters are better in controlling timing jitter than the conventional filters usually in the form of fabry - perot etalons
很多文獻已表明，採用傳統的固頻或滑頻的濾波器（通常是f ? p標準具）能很好地控制噪聲和孤子的相互作用。 -
By solving the nonlinear schrodinger equation with perturbation method and computer simulations, we have demonstrated that super - gaussian sliding - frequency filters are more effective to reduce timing jitter than conventional sliding - frequency filters without sacrificing the signal - to - noise ratio
通過求解非線性薛定諤方程和數值模擬，我們認為超高斯滑頻濾波器能很好地控制孤子的時間抖動和相互作用。 -
The main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy. the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment. the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively
具體如下： 1 ）採用了往返兩次通過的聲光頻移系統結合飽和吸收光譜技術的實驗方案，實現了冷卻俘獲激光頻率相對于銫原子冷卻循環躍遷的負失諧鎖定，短期頻率穩定度約在350khz以內，並可方便地調節其負失諧量而無須對后續光路再作調整； 2 ）建立了一套基於計算機程序控制的、銫原子激光冷卻與俘獲實驗所需的時序控制系統。 -
It is necessary in digital communication system that carrier recovery can compensate frequency offset and phase jitter brought by transmission and modulation. this paper is mainly focused on carrier recovery technique. we introduce the channel model at cable headed and receiving site. firstly, we introduce the principle of carrier recovery and give some algorithms of them, which are directed - decision, reduced constellation and frequency sweeping
本論文緊緊圍繞著數字通信系統中的載波恢復技術，在介紹了有線通信系統所用的調制解調通道模型后，首先闡述了載波恢復技術的思想和基本原理，在此基礎上給出了三種載波恢復演算法，即判決導向演算法、簡化星座判決演算法和掃頻演算法，並且給出了其各自的模擬圖：然後深入研究了一種適合高階qam並且能糾正較大頻偏的載波恢復技術：極性判決演算法。 -
The frequency band extension with time base jitter is also studied by simulation. the results show that the compensation of time jitter can reduce the error of signal and then increase the accuracy of frequency band extension
對時基抖動的頻帶展寬技術的模擬結果表明，通過擴展的概率密度法對時基抖動的補償，可以減小信號的誤差，因而提高頻帶展寬的精度。 -
The numerical results demonstrate that the larger the zone of timing jitter and the higher the frequency, the less proportion the discrete psd component is in the total psd
數值計算結果表明，隨時間抖動范圍增大和頻率提高，離散功率譜分量所佔比例下降。 -
One way to reduce timing jitter is the use of narrow - band frequency - guiding filters periodically distributed along the transmission line
控制孤子的時間抖動和相互作用的一個重要方法是在傳輸線中周期性地安放濾波器。 -
This paper presented a ml estimator for the estimation of high - frequency sampling noise model to solve the problem that high - frequency sampling suffer from both additive noise and time jitter error estimation
摘要針對高頻數字采樣中的附加噪聲和時間抖動誤差估計問題，給出了高頻數字采樣測量噪聲誤差的最大似然估計方法。 -
The clock used should be free from significant phase or frequency jitter
應用的時鐘應沒有重大的周期或頻率的跳動。 -
At the same time, the technology of frequency synthesis is developing rapidly and it requires much better performance on its reference source - crystal oscillator. so, it is significant for practical applications and development of theory to make researches on crystal oscillator ' s phase noise and phase jitter, and improve its performance fundamentally
同時隨著頻率合成技術的迅猛發展，對晶體振蕩器參考源的要求也越來越高，研究頻率源信號的相位抖動和相位噪聲，從根本上改善頻率源的性能，對于這一學科的理論發展和實際應用都具有重要的意義。 -
The basic principle of feedback crystal oscillator is analyzed. the basic concept of frequency stability is also introduced, following by the usual expression of phase noise in frequency domain and phase jitter in time domain. further, we describe the origin of crystal oscillator ' s phase noise and phase jitter, also list a variety of its contributors
然後從理論上分析了反饋型晶體振蕩器的基本工作原理，並闡述頻率穩定度的概念，給出了在頻域中相位噪聲和時域中相位抖動的表示方法，形成原因以及影響相位抖動的諸多因素。
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