frequency correlation function 中文意思是什麼

frequency correlation function 解釋
頻率相關函數
  • 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。
  • correlation : n. 相互關系，相關（性）；對比；交互作用；【數學】對射，異射。 correlation index 關聯指數。 correlation mineral 對比礦物。
  • function : n 1 功能，官能，機能，作用。2 〈常 pl 〉職務，職責。3 慶祝儀式；（盛大的）集會，宴會。4 【數學】...
  1. In the process of solving, poles are obtained from recurrent formula, modal vector are obtained from superposition formula not residuary. decoupled equation is derived when vibration source is part correlation, severely coupling appears in the process of input and output then frequency response function cannot directly get according to method mentioned above, decoupling is first problem

    當輸入完全相關時，頻響函數無解，可繞過頻響函數，直接運用線性系統的迭加原理來求響應，極點由遞歸公式得出，模態矢量由疊加公式求出，而不是由留數求得的相應的公式。
  2. In the fourth chapter, firstly, the fsk / psk signal function is presented, then, the signal which frequency and phase are modulated by costas code and barker code for each are analyzed at the same time. after that, the target returns and clutter returns are analyzed and modeled. at last, both of the time correlation characteristics and space correlation characteristics are theoretically analyzed

    在第四章中，首先給出fsk / psk信號的表達式，並對一種分別採用costas碼和barker碼進行頻率和相位調制的fsk / psk信號進行分析，然後對fsk / psk信號的目標回波和雜亂回波進行分析與建模，接著，對雜波信號的時間相關性和空間相關性進行理論分析，由分析結果可知， fsk / psk雷達雜波的時間相關性不變、空間相關性增強。
  3. The signal process function of the software include these function : digital filter, windowing, auto - correlation function and cross - correlation function, mean and variance, probability density function and probability distribution function statistic ; auto - power spectrum, cross - power spectrum, frequency response function, coherence function, cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer )

    軟體的處理功能包括：數字濾波、時域加窗、自相關與互相關處理、均值和方差計算、概率密度和概率分佈函數計算；在快速傅立葉變換（ fft ）基礎上計算自功率譜、互功率譜、頻率響應函數、相干函數、倒頻譜分析；基於短時傅立葉變換（ stft ）的聯合時頻分析等。
  4. The principle of vibrator is to introduce scattered energy to underground in a comparatively long time, and collect the energy through correlation and compress it into a narrow pulse. the portable high - frequency vibrator system, developed by key lab of geo - exploration and instrumentation ( jilin univ ), ministry of education, generates chirp signal and accumulates energy through a long - time bestiring. according to the characteristics of vibrator, the seismic recorder that operates on - line with vibrator must have these functions as follow : first, it must have the ability of recording a great quantity of data. second, it must have assistant channels to sample reference signal. third, it must have the function of data correlation in real - time

    可控震源利用可控的小能量、長時間激發波來實現沖擊震源瞬時產生的大能量激發波。在利用可控震源進行地震勘探時，要求地震儀長時間記錄地震信號，這對地震儀的采樣長度提出了很高的要求。受存儲量和數據傳輸速度的限制，絕大多數地震儀很難對如此大的數據量進行記錄，同時，可控震源要求地震儀有兩個輔助通道並且具有數據相關功能，目前國內還沒有出現滿足要求的地震儀產品。
  5. Secondly, because of the faultiness of these algorithmic routines of dissipation factor in existence, this dissertation puts forward an improved correlation function algorithm based on wavelet analysis, and the improved algorithm focuses on two lesding aspects : one is the methods to reduce noise and distill the fundamental, the other is the means to reduce the errors resulted by frequency fluctuating

    其次針對現有介損計算方法的不足，提出了一種基於小波變換理論的改進相關函數法的介質損耗值計算方法，主要從去噪、提取基波的方法以及降低由於電網頻率波動所造成的誤差兩個方面來考慮。並對此方法進行了模擬分析和驗證了改進演算法的優越性。
  6. 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。
  7. Second, we discuss the correlation properties and the hamming correlation properties of a number of trace function generation sequences by using systematic ways. we calculate the correlation function of generalized trace function sequences which include no sequences > kasami sequences and kumar - moreno sequences, and we also calculate the hamming correlation function of no sequences ^ kasami sequences and kumar - moreno sequences. at last, we degine the frequency - hopping sequences with optimal hamming correlation properties

    其次，用較為統一的工具去研究各種跡函數生成序列的相關特性與hamming相關特性，求出了更廣意義下跡函數生成序列的相關函數，這類序列包括了no序列、 kasami序列與kumar - moreno序列；同時求出了no序列、 kasami序列和kumar - moreno序列的hamming相關函數值，研究發現某些具有良好相關特性的跡函數生成序列未必具有良好的hamming相關特性；最後，構造了具有最佳hamming相關性能的跳頻序列族。
  8. Information of system auto and cross spectrum, auto and cross correlation. coherent function, signal to noise ratio, frequency response and impulse response was established to help the study and arrangement of the module components

    由力規及加速規兩量測之時域訊號，經快速富利葉轉換，計算其自頻譜及互頻譜，再經反富氏轉換回時域之自相關及互相關函數、相通函數、訊噪比、頻率響應函數、脈沖響應函數。
  9. Frequency code is not uniformity distribution and keeps to a probability distribution function defined by the spectral characteristics of the target of interest. the phase code is equally duality pseudo - random sequence and used to reduced the sidelobes of the signal correlation function. and the mismatch - phase sequence is corresponding with the frequency sequence one by one

    而頻率編碼為不均勻分佈，由所觀測目標的頻譜信息提取出概率密度函數決定頻率編碼序列的分佈；相位編碼為二元的偽隨機序列，採取均勻的二相編碼，消減同頻脈沖帶來的過高的相關函數的旁瓣；而失配相位為與頻率編碼相一一對應于各子脈沖中。
  10. ( 1 ) equation is deduced when input is complete correlation, frequency response function has not solution ( order of numerator of polynomial need not be defined ). we can directly use superposition principle of linear system to obtain response without solving frequency response function

    （ 1 ）當輸入部分相關時，輸入矩陣為非對角矩陣，其頻響函數不能直接求得，本文推導了解決此類問題的公式。
  11. As another application instance, a subsystem monitoring ultra - high frequency partial discharge of transformer is developed, which can analyse, process, plot time - domain pd data and demodulated pd data, besides, it also has such discharge type recognition function as spectrum calculation and auto correlation

    作為另一應用實例，研製了變壓器超高頻局放監測子系統，此系統具有分析、處理、顯示超高頻時域波形及其包絡線波形數據的功能，還具有用於放電模式識別的時域波形及其包絡線波形的頻譜計算和自相關處理等功能。
  12. The correlation detection using the periodicity of the direct sequence autocorrelation function can estimate the symbol period at intermediate frequency or at baseband. simulation results indicate that the former is superior to the latter when the demodulated frequency is unequal to the carrier frequency

    時域相關檢測方法利用擴頻信號的周期自相關特性，能在中頻和基帶對擴頻碼周期進行估計，模擬結果表明中頻檢測時性能較好。
  13. Cross - correlation method used in get based frequency part and realized balancing function. gao huawei ( mechanical design and theory ) directed by vice - prof

    採用互相關原理提取振動信號基頻分量，計算振幅和相位，完成了動平衡功能。
  14. Cdma has become the main technology of the third generation mobiletelecommunication. many users in cdma system are distinguished by differentspread sequences and have the same time chip and frequency unlike in theconventional tdma system or fdma system. but the practical spread sequences cannot reach the ideal condition, the correlation function equals zero, so that it will causethe multiple access interference ( mai ) when lots of people are communicating. multi - user detection ( mud ) makes joint detection on the received signals by makingfull use of the information of all users ’, which relaxes mai and increases the capacityof system

    Cdma技術已經成為第三代移動通信系統中的主流技術，它與傳統的fdma 、 tdma不同，在cdma系統中多個用戶均佔用同一時隙、同一頻隙，所不同的是選取的地址碼不同，而實際選用的地址碼間的互相關函數又不可能全部達到理想狀態的全為零，因而造成了多個用戶同時通信時，必然要產生多址干擾。
  15. Then, base on the determine channel modeling methods, we present a frequency - selective mimo fading channel with von mises probability density function, which is used to characterize non - uniform angle - of - arrival caused by non - isotropic scattering. then we analyze partial cross correlation function of proposed model and proved the model theoretically

    然後，通過對其它多入多出通道模型的分析和對比，並基於確定性通道建模方法，建立了一種通用的頻率選擇性多入多出衰落通道模型，藉助「 vonmises 」概率密度函數，以描述非均勻散射體導致的非均勻本地來波方向分佈。
  16. Based on analysis of synchronization techniques in ofdm, this dissertation present a ml arithmetic to estimate time and frequency offset using symmetrical & conjugate prefix. the correlation peak of likelihood function curve is very sharp according this arithmetic, so the symbol synchronization by this arithmetic is exacter than that by general arithmetic using cycle prefix

    文中在全面分析ofdm同步技術的基礎上，提出了利用對稱共軛前綴的最大似然估計法來進行符號定時和頻偏估計，相對于傳統的利用循環前綴的最大似然演算法，這里提出的演算法可以獲得尖銳的相關圖樣，定時精度高，頻偏估計誤差小。
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