The two dimensional FFT method is applied to process closed fringe.
研究了二维fft处理闭合干涉条纹的算法。
The results show that the FFT method is and effective way for the FMCW detection radar in signal processing.
该结果表明，快速傅里叶变换(FFT)方法是对探测雷达系统的回波信号进行数字信号处理的有效方法。
FFT method is used here to decode the multi - frequency Register signals, which is also suitable for other multi - frequency signals' detection.
解码部分采用FFT算法从频域进行检测，该方法也可用于其它多频信号的检测。
The Gaussian quadrature is a highly accurate numerical integrator and yields results that outperform those from the prism method and the FFT method.
高斯积分法是一个高精度的数值积分方法，它的计算结果精度胜过角柱体法与快速傅利叶法。
In addition, the FFT method is immune to the background noise of the signal, so that the process of signal-processing by the FFT method can advanced.
另外，快速傅里叶变换方法由于不受本底噪声影响，可以不必在信号处理时去掉本底噪声，因而可以明显缩短测量时间。
Since the flight test data are of time domain, it needs to be converted into frequency domain by FFT method. Then it can be used to identify the system.
由于飞行试验数据是时域数据，使用这种方法需要使用FFT的方法将实测的时域数据转换成频域数据后再进行辨识。
It is normal to use the FFT method to analyze signals. This method is one kind of mathematical method that changes the time domain signals to frequency domain signal.
对信号进行分析时通常采用传统的傅立叶变换方法，傅立叶变换是时域和频域相互转换的数学工具，从物理意义上讲其实质是将信号分解成许多不同频率的正弦波的叠加。
This paper presents the input voltage shape reconstructed by FFT method from the distorted output shape and unit step response of impulse high voltage measuring system.
本文介绍了一种根据冲击测量系统的方波响应和输出波形，利用FFT算法重建输入波形的方法。
It is considered completely in theory why the NBI method based on filter Banks can overcome the disadvantages of FFT method, and the adaptive subband merging is presented.
从理论上详细分析了基于滤波器组的窄带干扰抑制技术能够克服基于FFT频域均衡缺点的主要原因，并在此基础上提出了基于自适应子带合并的算法。
Compared with traditional FFT method, MESE not only has higher resolution but also fits the processing of transient data, so, it can show the relation of amplitude to both time and frequency.
与传统的FFT相比极大熵谱法具有频率分辨率高，适于短时瞬态数据处理，而且能给出振动幅值与频率和时间三者的关系。
The results indicate that, for high resolution superstructure of IIR of ship targets, lo-cal features are better than global features. That is, spline function method is better than FFT method.
实验结果表明，对于高分辨率的舰船上层结构的红外象而言，局部化特征优于全局化特征，即采用样条函数法比FFT法有较高识别率。
The correlation method and FFT method of the power spectrum estimation could not completely reflect the concept of the power spectrum of the non-stationary random signals because of data truncation.
对于非平稳随机信号的功率谱分析，采用自相关函数傅里叶变换和直接傅里叶变换分析时，由于存在数据截断，二者从概念上都不能很好地反映随机信号的功率谱。
The simulation results show that compared with the traditional FFT method, correlation wavelet method exhibits obvious advantages over FFT method, and the accuracy of the results is greatly improved.
结果表明，相关小波法比FFT方法具有更明显的优势，获得了更高精度的脉冲响应函数和频响函数的提取。
This paper studies the FFT analysis and the synthesis method of the symmetric coupler curves in mechanism.
本文对机构学中对称连杆曲线的FFT分析和综合方法进行了研究。
Fast Fourier Transform (FFT) is an effective method to detect harmonic.
快速付立叶变换(FFT)是对谐波进行检测的有效方法。
The method can take full advantage of the high efficiency of FFT.
本文方法可以充分利用FFT的高效运算。
Compared with the original two kinds of Phase-Difference Correction, only one sequence of time-domain signal is sampled and FFT analysis of same points is performed twice in this method.
与原两种相位差法相比，这种方法只采一段时域信号，且进行两次相同点数的FFT分析。
In this paper, based on scalar diffraction theory, light fields in the coherent optics system have been calculated by the spatial tracing simulation method that USES FFT.
利用标量衍射理论，对相干光学系统中光场进行空间追踪模拟，该方法可以对光学系统中激光光场的分布进行预。
The structure and the performance of the FFT-based acquisition method is analyzed in this dissertation.
本论文对基于FFT捕获方法的捕获结构和捕获性能进行了理论分析。
Comparing with the FFT and the amplitude measure arithmetic, the novel method can avoid the spectrum leakage and fence effect in ideal extent and improve the precision of harmonics measurement.
与FFT和幅值检测法相比，该方法能消除fft算法的频谱泄露，提高了谐波检测的精度，且适用于含有非整数次谐波的信号。
Comparing the recovered results of FFT with the displacement obtained by the iteration method shows that the approach proposed in this paper indeed improves the estimation of the ground displacement.
对FFT和所介绍的迭代方法所给出的恢复结果进行比较表明，本文所提出的方法确实改善了地面位移的估计。
In order to realize a noise octave analysis by software, a digit weight method based on FFT is proposed.
为了利用软件实现噪声倍频程分析，提出了一种基于FFT的数字计权方法。
A method on investigating digital signal using digital oscilloscope with function of FFT was prompted.
提出了一种用带FFT功能的数字存储示波器研究信号处理的方法。
This article presents a digital type electromagnetic radiation measurement system along with its schematic circuit diagram, high speed discrete data sampling method and FFT calculation methods.
本文详细介绍电磁辐射数字化测量系统，给出了电路原理图，离散化数据高速采样方法及FFT计算方法。
A new thought of combining frequency estimate method based on FFT with that based on multiple signal classification (MUSIC) is presented.
提出了将基于FFT的频率估计法和基于多重信号分类(MUSIC)的频率估计法相结合的新思路。
A method of using fast Fourier transformation (FFT) to calculate the frequency characteristics of discrete mathematical model is introduced.
介绍了利用快速富里叶变换(FFT)计算离散数学模型频率特性的方法。
The method is compared to the traditional FFT(Fast Fourier Transformation)analysis. The feasibility of analyzing the engineering measure data using wavelet transformation is discussed in this paper.
并将该方法与传统快速傅立叶变换分析结果进行比较，探讨了使用小波变换对工程实测数据进行分析的可行性。
One method is phase difference correction of partly FFT; the other is FFT frequency correction with quadratic interpolation.
一是利用分段FFT的相位差修正算法，二是基于二次内插的频率FF T校正法。
One method is phase difference correction of partly FFT; the other is FFT frequency correction with quadratic interpolation.
一是利用分段FFT的相位差修正算法，二是基于二次内插的频率FF T校正法。
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