傅里叶变换

离散分数阶傅里叶变换快速算法的DSP详细实现

Implementation of fast algorithm of discrete fractional Fourier transform on DSP

CCD的非线性效应对改进型傅里叶变换轮廓术的影响

Effect on the Fourier transform profilometry due to the CCD nonlinearity

可见光再现X射线无透镜傅里叶变换全息图的可行性研究

Study on the Feasibility of Reconstructing X-ray Lensless Fourier-Transform Hologram with Visible Light

用匹配傅里叶变换估计星载SAR多普勒参数

Estimation of Doppler Parameter of Spaceborne Synthetic Aperture Radar by Matched Fourier Transform

傅里叶变换红外光谱测定极性化SBS中的PMMA含量

Determination of the content of PMMA in polarized SBS by FTIR

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 .

方法用HPLC测定芍药苷含量，傅里叶变换红外光谱仪分析FTIR光谱。

METHODS The PF content was detected by HPLC and FTIR spectra was analyzed with Fourier transform infrared spectrometer .

本文在理论上用两维快速傅里叶变换（FFT）分析了准直中基于像传递的近远场信号对图像处理影响；

The effects of this technique on the image processing is analyzed theoretically by two dimension FFT simulation .

傅里叶变换红外光谱对阴离子表面活性剂SDS与牛血清白蛋白相互作用的研究

Study on Interaction of Anionic Surfactant SDS and Bovine Serum Albumin by Fourier Transform Infrared Spectroscopy

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 .

结合快速傅里叶变换（FFT）技术，可获得通信线上各点的时域暂态横向电压。

The transverse voltage in time domain can be obtained from that in frequency domain by means of FFT .

设计一种可以连续计算N点复数序列傅里叶变换（FFT）的流水线结构处理器，其序列长度N（为2的幂）可变。

A pipeline processor which may compute various 2 ~ n points FFT is proposed for continuously performing complex points fast Fourier transforms ( FFTs ) .

通过X射线衍射、傅里叶变换红外光谱和差热分析表征聚乙二醇（PEG）/蒙脱石复合物的结构。

Polyethylene glycol ( PEG ) / montmorillonite composites were characterized by X-ray diffraction , Fourier transform infrared spectrum and differential thermal analysis .

对爆震与非爆震两种信号进行了波形对比、快速傅里叶变换（FFT）分析和爆震强度评价。

Comparison of wave shape , FFT analysis and knock intensity value between the knock and non-knock signals are made .

基于傅里叶变换红外反射谱的DRAM深沟槽结构测量系统研究

Model-Based FTIR Reflectometry Measurement System for Deep Trench Structures of DRAM

基于快速傅里叶变换（FET）的磁性参数的计算方法

FFT - Based Estimating Methods of Magnetic Parameters

纳米材料ZrO2的傅里叶变换红外光声光谱研究

Research on FT-IR-PAS Spectra of Nanocrystal ZrO_2

本文提出了动态粘弹仪的快速傅里叶变换（FFT）数据处理方法，对高分子样品的应力、应变进行FFT，在频域中求取复合杨氏模量。

A Fast Fourier Transform ( FFT ) method for the data processing of dynamic mechanical property in the frequency domain is presented .

在电能质量检测方面，本文采用的是经典的快速傅里叶变换算法（FFT），它能够准确而稳定的得出各项技术指标。

Power quality detection is the classic fast Fourier transform algorithm ( FFT ), it can accurately draw the technical indicators and stable .

对这种新材料进行了傅里叶变换红外吸收光谱、X射线光电子能谱、X射线衍射和薄膜的维氏显微硬度等测量。

The sample is evaluated by Fourier transformation infrared absorption spectroscopy ( FTIR ), X-ray photoelectron spectroscopy ( XPS ), X-ray diffraction analysis ( XRD ) and Vickers microhardness measurement .

光束分数傅里叶变换的Wigner分布函数分析方法

Fractional Fourier transform of beams in the use of the Wigner distribution function method

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 .

Wigner分布函数及非整数傅里叶变换

Wigner distribution fuction and non-integer Fourier transform

短时傅里叶变换（short-timeFouriertransform，STFT）是一种常见的时频分析工具，窗函数的选择是其分析的前提。

Short-time Fourier transform is a useful tool in time-frequency analysis , and the choice of window function is the precondition for their analysis .

基于Radon-Ambiguity变换和分数阶傅里叶变换的chirp信号检测及多参数估计

Chirp Signal Detection and Multiple Parameter Estimation Using Radon-Ambiguity and Fractional Fourier Transform

针对任意平面分层的非均匀介质情形，以偶极子激励为例，应用快速傅里叶变换（FFT）来完成汉克尔变换计算。

Here , fast Fourier transform is used to finish the calculation of Hankel transform in case of a dipole exciting in arbitrary planar layer media .

本文提出一种计算微带传输线的新方法，它是从场匹配出发，通过引入傅里叶变换建立了谱域中SLE和SLM模的等效电路。

An efficient hybrid field solution to microstrip transmission lines is presented by using SLE and SLM modes in spectral domain .

采用基于快速傅里叶变换（FFT）技术控制叶片的运动，是一种简单有效的运动控制方法，可以使大量随风摆动叶片的实时绘制成为可能。

The dynamically created primitive strip by the GeometryShader , image-based rendering method and the FFT-based flow control method make the real-time rendering dynamic grass blade possible .

乘法器是DSP高效地处理卷积、滤波和快速傅里叶变换等以乘或乘加操作为主的运算的关键所在。

For DSPs dealing with operations such as convolution , filtering , FFT which consist of repeated additions and multiplications , a multiplier handling the work fast and efficiently becomes a key role .