This paper present the implementation of a 64 - point , a 256 - point and a 1024 - point ( i ) fft ( ( inverse ) fast fourier transform ) with 16 - bit complex data precision suitable for ofdm 摘要提出了一种64点， 512点和1024点( i ) fft （ （逆）快速傅里叶变换）的硬件实现方法，适合应用在正交频分复用( ofdm )系统中，实现时采用了16位精度的复数来表示输入输出数据。
The article detailedly researches the characters of the american option and the principle of forming its value , and offers a new , very fast and accurate numerical pricing method of the american put option ? " fft " method 本文深入剖析了美式期权特点及其价值形成机理，提出了一种新的快速的高精度的美式看跌期权定价的数值方法?快速傅里叶变换法。
So the unified method is lacking for computing fault character of circuits . as increasingly maturation of neural networks theory and its application , it has been becoming a major research project to apply fault feature extraction and neural networks to diagnosis faults 利用快速傅里叶变换和小波变换方法提取故障特征后,训练样本仍然陷入高维灾难,还需对数据进一步压缩,因此提出了一种数据压缩算法。
Furthermore , sampling and processing of ac , including some ac sampling algorithms , are reached . mainly , fft algorithm and full - wave fourier algorithm are discussed . calculation of active power and imaginary power is researched 同时对模拟量的采集与处理以及一些交流采样的算法进行了研究；主要就快速傅里叶变换算法、全波傅氏算法以及有功功率、无功功率的计算、滤波的参数选取、谐波的计算进行了讨论。
This dissertation is mainly about the transit radiation of the electron beam passing through the gap with the random standing wave electric field . in order to satisfy the requirement of the task , the feasibility of generation of more than 1 gw high power microwave in x - band using the transit radiation oscillator based on the transit effect is studied 研究了二维柱坐标系网格划分算法，并用此算法对五腔开放腔进行网格划分，采用时域有限差分与快速傅里叶变换相结合的方法计算了五腔开放腔/ 6 、 2 / 6 、 3 / 6 、 4 / 6 、 5 / 6模这五个模式的频率和场分布。
We use fast fourier transform arithmetic to calculate two seriate images . this article discusses the basic principle of the cross - correlation arithmetic in detail , discuss each stage of its produce and development and also discuss the thinking , the merit and the defect of each algorithm . based on these discusses , we confirm our algorithm and realize it in programming with c + + 粒子图像的匹配算法的主要运算是将两连续的视频图像进行基于快速傅里叶变换的互相关运算，本文详细论述了相关算法的基本原理，它的产生和发展的各个阶段，在比较了各种算法的基础上确立了自己的算法并以c + +编程实现。
The data processing part includes fft , filter and averaging , calibration algorithm , smith chart designing , s - parameter algorithm , transmission and reflection caculating , etc . the hardware interface consists of control information protocol , data transfer protocol , status information protocol and the synchronization protocol of the transfer of all the above information 数据处理部分包括快速傅里叶变换、滤波与平均、用s参数表示的传输反射特性算法、表示阻抗特性的史密斯圆图算法、校准补偿算法、以及实时测量的实现算法等。接口部分包括控制信息协议、数据传输协议、状态信息协议以及上述各种信息传输的同步协议。
It involves not only the detection of signal frequency , signal phase and power factor but also calculation and control of phase . the method of calculating phase is based on fast fourier transform algorithm ( fft ) . it is used to calculate signal frequency , signal phase , power factor and the phase on / off time according to sampling instantaneous value of voltage and current 本文主要提出了采用信号处理技术(快速傅里叶变换fft ) ，根据电压、电流采样的瞬时值，计算信号频率、信号相位、功率因数、分合闸相角的选相控制方法，并介绍了最终控制分合闸的原理与实现方法
After fft appeared in the 20th century 60 ' s , the sensor technology , the signal processing technology , the artificial intelligence technology and so on are applied for the diagnosis , and cause the fault diagnosis technology gradually to consummate , many fault diagnosis methods and equipments are also established with them 在20世纪60年代快速傅里叶变换( fft )出现后,传感器技术、信号处理技术、人工智能技术等在诊断中的应用,使故障诊断技术逐渐完善,各种故障诊断方法和设备也随之建立。
