Discrete Fourier Transform

the discrete fourier transform algorithm and its analysis

离散傅里叶变换的算法及其分析

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A implementation of the discrete Fourier transform in visual basic classic.

阿实施离散傅里叶变换在VisualBasic中的经典.

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according to the theory of digital signal processing, discrete fourier transform has selectivity to frequency just as spectrum analyzer.

根据数字信号处理理论，离散傅里叶变换（DFT）算法对频率具有选择性，有相当于频谱仪的功能。

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We then emphasize from the theoretical principle and the experimental realization the efficiency of the quantum factorization by using the remainder function and discrete Fourier transform.

并着重从理论原理和实验实现这两方面说明利用余因子函数和离散傅里叶变换使这种量子算法对因子分解是有效的。

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The first kind of multiplexer utilizes SiO2 PLC-based directional couplers, optical delay lines and thermo-optical phase shifters to implement time delay and phase shifting respectively, so as to implement optical inverse discrete Fourier transform.

第一种复用器利用平面光波导耦合器、热光移相器及波导延时线来分别实现移相和延时，从而实现全光离散傅立叶反变换。

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Use high precision zero flux through current sensors which fit the industrial environments to achieve the goal of measuring the end of the screen small current accurately, then use discrete Fourier transform to calculate the dielectric loss factor devices to achieve a capacitive device online monitoring system.

选用在工业环境下具有高精度零磁通穿芯式电流传感器，实现了末屏小电流的精确检测，并采用离散傅里叶变换计算出设备的介质损耗因数，实现了容性设备在线监测系统。

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some interpolated discrete fourier transform ( dft) methods are analyzed.

本文首先讨论并分析了各种插值DFT（离散傅里叶变换）算法，然后提出了一种实正弦信号的快速插值频率估计方法。

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The influences of the CCD resolution and the discrete Fourier transform on correlation results are discussed.

讨论了CCD分辨率 和离散傅里叶变换等因素对光电混合检测效果的影响.

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A 64 points Discrete Fourier Transform code in AVR asm.

64点离散傅立叶变换代码的AVR学会.

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Discrete Fourier Transform ( DFT) is used to realize the coherent integration, which improves the relative ambiguous frequency estimation precision of coherent pulse group. This algorithm has low computational complexity and high estimation precision for Doppler frequency rate-of-change.

针对单载频雷达脉冲信号，提出了基于相关的脉冲群间多普勒频率变化率高精度估计算法，通过离散傅立叶变换实现了相参积累，提高了相参脉冲群相对模糊频率估计精度。

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Some interpolated Discrete Fourier Transform ( DFT ) methods are analyzed.

本文首先讨论并分析了各种插值DFT ( 离散傅里叶变换 ) 算法,然后提出了一种实正弦信号的快速插值频率估计方法.

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Get the amplitude frequency characteristics of impulse response and aeroelastic coupling response by discrete Fourier transform of time domain response, then get the structural damping of blade and tower and the aeroelastic damping of blade based on half-power bandwidth method.

通过对时域响应进行离散傅里叶变换，得出脉冲响应与气弹耦合响应的幅频特性，然后基于半功率带宽法得出叶片与塔架的结构阻尼及叶片的气弹阻尼。

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Discrete fourier transform ( DFT) is the basic method for measuring the phasor of power system in real-time.

离散傅里叶（DFT）算法是电网实时运行系统中进行相量测量的基本算法。

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the uplink used single carrier frequency division multiple access ( sc-fdma) which is realized by the extended discrete fourier transform ofdm ( dft-s-ofdm) technology, and the downlink uses orthogonal frequency division multiple access ( ofdma) technology in lte.

在LTE中，上行链路采用单载波频分多址（SC-FDMA），实现方式为离散傅里叶变换扩展OFDM（DFT-S-OFDM）技术，下行链路采用正交频分多址（OFDMA）技术。

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Discrete fourier transform ( DFT) was introduced into the spatial domain signal processing to analyse and process the uniformly spaced linear array signals, and a method to extract the DOA of signal was presented.

将离散傅里叶变换（DFT）引入到空域信号处理中，对等距线阵接收的信号进行了分析和处理，提出了一种提取信号来波方向的方法。

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Discrete Fourier Transform source code integrity, and can be used directly.

离散傅立叶变换的源代码完整, 并可以直接使用.

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The discrete Fourier transform ( DFT ) and discrete Hartley transform ( DHT ) can be considered as special cases of DYT.

常用的离散傅里叶变换 ( DFT ) 、离散哈特莱变换 ( DHT ) 均可视为DYT的特例.

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Through the discrete Fourier transform or complex wavelet transform seismic data from time domain to frequency domain, conversion amplitude spectrum has been calculated to explain the staff not only from the profile, but also from the plane to see the characteristics of thin-layer interference.

通过离散傅里叶变换或复小波变换将地震数据由时间域转换到频率域，转换后计算得到振幅谱，解释人员不但能从剖面上，而且能从平面上看到薄层干涉特征。

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Convolution of windowing function is traditionally used to explain the Discrete Fourier Transform ( DFT ) errors.

离散傅里叶变换 ( DFT ) 的误差一般是通过窗函数的卷积来解释的.

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a method of deconvolution with discrete fourier transform is discussed in this paper. compared with other methods of deconvolution ( z transform method and least square method), this method has three advantages: 1. high precision;

应用离散富氏变换（DFT）的反褶积方法，与计算反褶积的Z变换和最小平方法相比，具有以下优点：（1）精度高。

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the discrete fourier transform ( dft) can be derived from fht by means of the relationship between dft and dht.

利用DHT与离散Fourier变换（DFT）的关系，DFT可以由FHT求出。

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Further analysis shows that the quadrature filtering algorithm is a simplified algorithm of Discrete Fourier Transform ( DFT ) .

进一步分析表明,正交滤波算法是 离散傅立叶 变换的一种简化算法.

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discrete fourier transform ( dft) is one of the most popular methods applied in computer-based measurement of harmonics signals.

通过离散傅立叶变换（DFT）对电网谐波信号进行分析是常用的方法。

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A scheme for realizing the quantum discrete Fourier transform in the ion trap

量子离散Fourier变换在离子阱中的实现方案

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The time correlation is used to model the service behavior, the discrete Fourier transform is used to determine the reasonable monitoring period and the Bayesian theory is used to predict the abnormal behavior.

该方法利用时间相关性构造了业务模型，用离散傅里叶变换确定了合理的业务监测周期，并用贝叶斯公式对业务的异常行为进行预测。

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