离散傅里叶变换

离散傅里叶变换可以从任意信号中抽取基准频率倍频次信号的相位、频率和幅值，可以解决谐波对外同步信号的影响，从而实现周期控制锁相环对谐波的识别。

The DFT phase detection method can take out frequency , phase and magnitude of the base frequency signal from a random synchronization signal .

本文提出一种基于增量调制（DM）序列的离散傅里叶变换（DFT）结构，它不同于基于脉冲编码调制（PCM）的常规方法。

A new implementation of the DFT based on delta modulation ( DM ) is proposed .

用离散傅里叶变换方法实现n路移频键控调制解调

An Implementation Method of n-channel FSK Modem with DFT

离散傅里叶变换快速算法的研究与MATLAB算法实现

Research of Fast Fourier Transformation and Realization of MATLAB

DFT（离散傅里叶变换）扩展OFDM系统的发送方案可以有效降低信号的峰均比。

The DFT-spread OFDM ( DFT-S-OFDM ) system can effectively improve the PAPR performance .

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。

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

提出了一种面向通用调制的基于离散傅里叶变换（DiscreteFourierTransform，DFT）的载波频偏盲估计算法，从理论上推导了该算法的基本原理，并给出了系统实现方案。

A novel blind carrier frequency offset estimation algorithm on the basis of Discrete Fourier Transform ( DFT ) is presented and theoretically deduced .

利用算术傅里叶变换（AFT）计算离散傅里叶变换（DFT）可使其乘法计算量仅为O（N）。

The multiplicity of computing Discrete Fourier Transform using the Arithmetic Fourier Transform are just only o ( N ) .

离散傅里叶变换（DFT）在电参量检测领域应用十分广泛，其算法基本原理是利用离散傅里叶变换抽取基波分量，计算出电参量参数。

The discrete Fourier transform ( DFT ) is widely used in the field of electrical parameters detection .

在不求出DOA的情况下，采用离散傅里叶变换来估计该路径下行信道协方差矩阵。

DFT is used to estimate the covariance matrix of downlink channel of the path , not calculating DOA .

提出了一种用离散傅里叶变换DFT（DiscreteFourierTransform）实现特殊滤波器的瞬时谐波电流的检测方法。

A simple and practical instantaneous harmonic current detecting method is introduced , which realizes a special filter based on DFT ( Discrete Fourier Transform ) .

本文提出一种基于离散傅里叶变换（DFT）估计电压闪变的新方法。

This paper proposed a new method to estimate voltage flicker using the discrete Fourier transform ( DFT ) .

快速傅里叶变换（FFT）是离散傅里叶变换（DFT）的快速算法。

Fast Fourier Transform ( FFT ) is a kind of fast computation method of Discrete Fourier Transform ( DFT ) .

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。

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

用离散傅里叶变换实现DMT，简化了其实现的复杂性；

Its simple realization using discrete Fourier transform ( DFT ) is also discussed .

根据4划分的傅里叶算法和能量叠加性质，我们又提出了另一个离散傅里叶变换算法，SP算法。

Moreover , we present another discrete Fourier transform algorithm , SP algorithm , which is based on radix-4 and the energy superposition .

对基于离散傅里叶变换（DFT）信号处理方式的柯氏质量流量计来说，影响其精度的关键问题是如何实现信号的整周期采样。

For the DFT-based Coriolis mass flowmeter , the key problem that greatly influence its precision is how to realize the integral period signal samples .

介绍一种基于离散傅里叶变换（DFT）的全方向M型超声心动图运动曲线频域滤波技术。

The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform ( DFT ) .

可用来计算长度为N的离散傅里叶变换（DFT），其中N为集合{2,3,4,5,7,8,9,16}中互素因子之积。

Using this method wecan compute the N-point DFT , Here N is the product of relative prime factors in { 2,3 , 4 , 5 , 7 , 8 , 9 , 16 }

本文首先对傅立叶变换的性质做了详细介绍，其中包括离散傅里叶变换，快速傅立叶变换（FFT）以及基-2按时间抽取（DIT）的FFT算法；

Firstly , the properties of Fourier Transform , including discrete Fourier Transform , FFT and based-2 DIT FFT , are introduced in this paper ;

尽管在空域叠加嵌入指纹，但算法本质上等同于在DFT（离散傅里叶变换）域嵌入水印，因此指纹的鲁棒性得以保证。

Though the fingerprint template is added in spatial domain , the efficiency is equivalent to that of the methods in DFT ( Discrete Fourier Transform ) domain .

在数据处理中，对所得到的复杂时域振动信号进行了离散傅里叶变换（DFT），从而在频率域获得了转子的振动频率和振幅信息。

In the data process the measured complex time signal is converted into frequency signal by DFT to get vibration information regarding frequency and amplitude of the rotor .

推导出一种在定间隔采样基础上能够有效消除非额定频率下离散傅里叶变换（DFT）算法产生的频率泄漏影响的相量校正算法。

Based on the fixed sampling interval technique , an improved phasor computing algorithm is proposed to correct the errors caused by DFT in the presence of frequency offset .

OFDM技术应用离散傅里叶变换和其逆变换方法解决了多个互相正交的子载波和从子载波中恢复原信号的问题。

Discrete Fourier transform and its inverter change are used in the OFDM technology , in order to solve the multiple problem of sub-carrier orthogonal each other and the original signal recovered from sub-carrier .

在传输突发包前插入一段已知的训练序列，接收端将信号进行差分、求相位后，对其进行离散傅里叶变换（DFT）。

For a given sequence , discrete Fourier transform ( DFT ) transforms it in to the frequency domain through grouping spectral line , the decomposition is to be implemented .

离散傅里叶变换（DFT）是数字信号处理中最基本、也是最重要的运算，它被广泛应用于多个领域，具有重要的理论和应用价值。

The Discrete Fourier Transform ( DFT ) is an important basic operation in digital signal processing . It has been widely used in many fields of science and technology .

根据带通滤波器的瞬时谐波检测方法，离散傅里叶变换基本思想，提出了运用基于DFT的滤波算法实现带通滤波。

According to the Discrete Fourier Transform , this paper proposes a method of harmonic detection by band filter based on DFT algorithm , which improves the dynamic performance of detection system .

在数字信号处理领域，离散傅里叶变换是一个非常重要的术语，尤其是在他的高效算法FFT出现以后，在信号分析和处理中得到了广泛的应用。

In the field of signal processing , the discrete Fourier transform is an important term . Especially , when its efficient algorithm FFT is given , it is usually used for signal analysis and processing .

对数极坐标变换（LPT）与离散傅里叶变换（DFT）相结合的方法（LPT-DFT）具有旋转和尺度不变性。

The combination of log-polar transform and Discrete Fourier Transform ( LPT-DFT ) has the prosperities of scale and rotation invariance .

在异步采样的情况下，离散傅里叶变换（DFT）由于频谱泄漏及栅栏效应，计算结果不够精确，不能满足同步相量测量精度的要求。

The result of Discrete Fourier Transform ( DFT ) in asynchronous sampling is not accurate and can not satisfy the requirement of synchronized phasor measurements , due to spectral leakage and barrier effect .