frequency domain filter 中文意思是什麼

frequency domain filter 解釋
頻率域濾波器
  • frequency : n. 1. 屢次,頻仍,頻繁。2. (脈搏等的)次數,出現率;頻度;【物理學】頻率,周率。
  • domain : n 1 領土,版圖;領地。2 管區,勢力圈;(特定動物等的)生長圈;(學問、活動等的)領域,范圍;【物...
  • filter : n 1 濾器,濾紙,過濾用料[砂、炭等]。2 【無線電】濾波器;【物理學】濾光鏡,濾色器。vt 過濾,用過濾...
  1. On the other side, we use the method of optical formation process to introduce two fundamental filtering function in frequency domain of coherence system of awg two optical processors are designed, that is optical signal add / minus and phase filter

    另一方面,運用光學信息處理方法,我們探討了awg型相干系統頻譜區兩類基本的濾波函數的引入,設計了兩種光信號處理器:光信號加減器以及位相,濾波器。
  2. On the basis of high speed hybrid filter banks adc system, a kind of downsampler model based on bandpass sampling theorem is presented, and analyzed, proved in time and frequency domain, in addition a downsampler is designed according to the model. a class of high effective hybrid filter banks adc system which bases on the downsampler and radio frequency spectrum is proposed, of which digital signal rate falls m times as fast as the former

    作者提出了一種基於帶通采樣定理的抽取器數學模型,對該數學模型進行了時域、頻域的分析證明后,設計了一種基於該數學模型的抽取器,進而根據無線電射頻信號頻譜的特點,提出了高效混合濾波器組adc系統,其數字信號輸出速率比高速混合濾波器組adc系統降低m - 1倍。
  3. The bottleneck of hybrid filter banks adc system is that it cannot sample directly higher radio frequency signal because of lower analog input bandwidth of its adc. in order to remove it, a kind of downsampler model based on nyquist and bandpass sampling theorem is presented, analyzed and proved in time and frequency domain, in addition a downsampler is designed according to the model. on the basis of hybrid filter banks adc system, a class of high speed hybrid filter banks adc system is proposed

    針對混合濾波器組adc系統因其adc模擬輸入帶寬低而不能對頻率較高的射頻模擬信號進行模/數轉換的瓶頸,作者提出了一種基於nyquist采樣定理和帶通采樣定理的抽取器數學模型,對該數學模型進行了時域、頻域的分析證明后,設計了一種基於該數學模型的sha抽取器,進而在混合濾波器組adc系統的基礎上,提出了高速混合濾波器組adc系統。
  4. Under the condition of " comparatively weak correlation between the two noises involved, coherence function is used as a frequency domain amplification factor for improving snr of the output signal to the filter and the speech enhancement effect. meanwhile, a real - time recursive algorithm is put forward in substitute for current algorithms based on short time fourier transform. the new algorithm will simplify computations and will be suited for real - time implementation together with the adaptive systems

    接著針對上述nanc系統兩路輸入信號噪聲相關性弱的情況,用相干函數作頻域增益因子來提高輸出信噪比與改善語音增強效果,同時,通過一種實時迭代演算法解決了短時傅氏變換計算量大的問題,簡化了計算,便於實時處理與實際應用。
  5. With the development of modern science and engineering technology, the two theory systems in target tracking filter domain are formed, which are classic wiener filter using frequency domain and modern kalman filter using state space

    隨著現代科學技術和工程技術的發展,目標跟蹤理論形成了經典的維納濾波(頻域法)和近代卡爾曼濾波(狀態空間法)的兩大理論體系。
  6. The paper firstly analyses the fundamental principles of the direct sequence spread spectrum technique, the arithmetic in the frequency - domain by using the technology of the spectrum correlation adaptive filter

    本文首先就設計中選擇採用的直接序列擴頻技術、以及在頻域中實現直序擴頻信號中多窄帶干擾抑制的自適應演算法的基本原理做了分析。
  7. Thus, the frequency domain adaptive filter is well suited to a multi - narrowband interference scenario, the paper studied frequency domain adaptive algorithms, carried out analysis and computer simulations. simulation results : for gold codes ds - ss signal of length 63, 4 interferences of signal to interference ratio ( sir ) 40 ub or 4 narrowband interferences of signal to interference ratio ( sir ) 40 db and frequency - spectrum bandwidth 12 percent of the whole bandwidth, the sir improvement is better than 20db

    模擬結果指出,在輸入信號為干擾是4個等強度的多音干擾或4個頻譜帶寬占信號總帶寬12的強窄帶干擾(干信比為40db )的擴頻信號(碼長為63的gold碼序列)情況下,演算法的干擾抑制比均優於20db 。
  8. The quantized lp coefficients are replaced by the unquantized lp coefficients in the frequency domain expression of the feel weighted filter. the error signal has more similar envelope shape, and the hearing effect is better than before because the unquantized lp coefficients have more accuracy than quantized lp coefficients

    由於未量化的線性預測系數具有更高的精度,因此,誤差信號通過修正後的感覺加權濾波器以後,具有與語音信號譜更加相似的包絡形狀,從而更好地利用共振峰對誤差的掩蔽效應,達到更佳的主觀聽覺效果。
  9. The latter primarily improves the transmission distance and reliability by selecting the repeater automatically. the frequency domain auto - adaptatation filter algorithm is deduced and reliabity by selecting the repeater automatically. the frequency domain auto - adaptaion filter algorithm is deduced and a method of frequency domain algorithm to restrain the marrow band interference is given on the foundation of the time domain minimum mean square error auto - adaptation filter. then the meter reading system to can learn the power network structure and automatically create linked path by using neural networks auto - study ability and analyzing the reading data

    後者主要是對中繼節點的自動選擇,以提高信息的傳輸距離與可靠性。針對電力線擴頻通信通道的特點,在時域最小均方誤差自適應濾波演算法的基礎上,推導了頻域自適應濾波演算法,並提出了頻域演算法抑制窄帶干擾的具體方法。運用神經網路的自學習方法,通過對抄讀數據進行分析,使抄表系統感知電網拓撲結構,自動建立中繼路徑。
  10. Also discussed the methods on how to realize the cwt both in time - domain and frequency - domain and how to design the gm - c bandpass filter used in realization of cwt. in order to optimize the performance of gm - c filter, linearization techniques are investigated and proposed. due to process variation and parasitics, an automatic tuning is designed for center frequency / 0 and quality factor q also, in this thesis, 16 - channel analogue cmos cwt circuit has been realized

    論文圍繞連續小波變換的模擬電路實現這一熱點問題,討論了連續小波變換的時域和頻域實現方法;具體分析了并行結構與串列結構的優缺點;研究了頻域法中的跨導-電容帶通濾波器的設計;給出了改善跨導輸入級傳輸特性的線性程度並擴大線性范圍的具體方法;設計了片內自校正(可調諧)環節使濾波器參數自動調整到設計標準值;最後給出了16通道濾波器組實現小波變換的方法。
  11. After discussing this kind of filter in this paper in detail, the grads algorithm in time domain and frequency domain is set up when the change of frequency is slow, so it means the algorithm only process the narrowband interference what it changes slowly

    論文對數字自適應外差濾波器進行了詳細的研究,建立了自適應外差濾波器的時域和頻域的梯度演算法,該演算法的推導使用了外差頻率變化緩慢的假設,這意味著該濾波器只能夠處理慢變的窄帶干擾。
  12. A serial generalized morphological filter with multi - structural element is used suppression white gaussian noise or pulse noise embedded in the speech signal. the paper compares morphological speech enhancement algorithm with classical approach on the feature of speech in the frequency domain and time domain

    本文針對形態學在數字語音信號增強中的應用演算法研究,採用多結構元素的廣義形態濾波器,主要用於對被高斯白噪聲或正負脈沖噪聲污染的語音信號的濾波增強,深入研究形態學濾波的語音增強演算法在語音時域、頻域對語音特徵參數的影響。
  13. The virtual digital signal processing instrument is developed with vc + + 6. 0 and matlab 6. 0 in windows 98. the system has realized signal generator, signal ' s sampling and averaging function, signal ' s power spectral density and cross special density analysis, the design and application of digital filter, signal analysis in time, frequency and inverted frequency domain

    該系統的工作環境為windows98 ,開發工具為visualc + + 6 . 0和matlab6 . 0 。實現了波形發生器的設計、信號採集及平均處理、濾波器的設計及應用、信號的時域、頻域以及倒頻域分析。
  14. The noise suppression uses two methods ? mlms self - adaptive filter arithmetic and blind signal separation. the lung sounds data analysis uses time domain analysis, frequency domain analysis, power spectra analysis, time - varying spectra analysis and so on. healthy people and lung disease patients ’ lung sounds are collected by the system and the data affirms the reliability and practicability of the system

    我們利用該系統對正常人和肺病患者的肺音進行了採集和分析,通過這些分析數據,既肯定了該系統的可靠性和實用性,又對各種肺音分析演算法進行了對比和驗證,對該系統的臨床應用打下了良好的基礎。
  15. 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。
  16. As analyzing the optical spatial filter and frequency domain filter with wavelet transform, the space variable processing > matched filtering and imagery system are the examples. all of these confirm the feasibility of wavelet transform applied in optical information processing

    用小波變換處理光學信息,主要的是應用小波的多分辨特性,小波變換的定義是一相關運算,很容易在光學系統中實現,這是光學小波變換的理論依據。
  17. So we adopt an radial basic function neural network and a three - order volterra series filter to construct two prediction model which are used to predict the eeg signal. in this paper, we improve the radial basic function neural network and breach the two - order limited by using product - coupling to realize the three - order volterra series filter. wavelet transform is an analytical method that unites the time and frequency domain

    因此,本文採用徑向基函數神經網路和三階volterra級數濾波器分別構造腦電信號的兩個預測模型;對通常的徑向基函數預測網路作了改進,並且採用乘積耦合近似實現三階volterra級數濾波器,突破了常規上只能用二階volterra級數濾波器的限制。
  18. And according to the characteristics of the noise, we provided some algorithms : wiener filter based on noise characteristic, multi - threshold wavelet filter, temporal - spatial - frequency domain combined filter based on the motion estimation

    並根據噪聲的特點,提出了基於噪聲特徵的wiener濾波方法、多閾值小波濾波器、基於運動估計的時空頻域相結合的濾波方法。
  19. The software is developed on the platform of labwindows / cvi that includes nine main modules : data acquisition, pre - processing, stable state analysis, tracking filter, time domain analysis, frequency domain analysis, modern processing method, wavelet transform and trend analysis. it is provided with friendly man - machine communication interface, handy operation and all - around functions

    該軟體以labwindows cvi為開發平臺,共包括九個模塊:數據提取模塊、預處理模塊、穩態分析模塊、跟蹤濾波模塊、時域分析模塊、頻域分析模塊,現代處理方法模塊、小波分析模塊、以及趨勢分析模塊;軟體具有良好的人機交互界面,操作簡便,功能齊備。
  20. Attack the watermarked image through adding noise, filter, and jpeg compress. in the extracted watermark from the attacked image, the important part, which is embedded into frequency domain, has good robustness

    對含水印圖像進行噪聲、濾波、 jpeg壓縮等攻擊,確保了dct域中的重要部分有良好的魯棒性。
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