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Description: 应用离散傅里叶变换DFT，通过MATLAB实现对连续信号频谱分析，以满足理论分析和工程实际的需要。
-application DFT Discrete Fourier Transform, right through MATLAB continuous signal spectrum analysis, in order to meet the theoretical analysis and practical needs.
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Size: 79293 |
Author: 殷开 |
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Description: 用MATLAB语言编写的基2 DIT FFT子程序& 用简单的速度很低的方法计算DFT-using MATLAB prepared by the two-DIT FFT routines
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Size: 1536 |
Author: egg |
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Description: MATLAB 的有限序列的离散傅里叶变换（DFT）源程序
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Size: 814 |
Author: 陈咚咚 |
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Description: 自己实现的一维、二维DFT。优点：变换后的低频分量在中间，弥补了matlab库函数的不足（高频分量在中间）
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Size: 1877 |
Author: 葛建飞 |
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Description: 加arnold置乱的数字水印在matlab下的ＤＦＴ仿真实现整个程序运行还行，共享给大家-jpeg of the Matlab Simulation, and the whole process has run OK, for everyone to share
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Size: 2383 |
Author: 小户 |
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Description: Single Carrier FDMA又称SC-FDMA或者DFT-Spread-OFDM是3GPP LTE最新提出的适用于上行传输的一种新方案。相对于OFDMA（主要用于下行），其最大的优势在于低峰值平均功率比（即PAPR）。本程序包括OFDMA，SC-FDE（单载波频域均衡）以及SC-FDMA程序，接收端采用经典的ZF和MMSE检测算法，程序短小精悍，相当经典，方便该领域的人学习与研究。
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Size: 50595 |
Author: 程鹏 |
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Description: 离散傅里叶变换，开发环境是MATLAB。
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Size: 11269 |
Author: andy |
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Description: 内附英文说明（html文件），配准速度较快，经测试效果不错。
注：若不用control points，使用dftregistration.m即可，但需根据要求稍加修改。
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Size: 237545 |
Author: xiading333 |
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Description: 基于MATLAB的DFT实现程序
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Size: 360 |
Author: yuelei0615 |
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Description: OFDM系统的DFT信道估计的matlab程序，也包括了瑞利信道的matlab实现
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Size: 2777 |
Author: zhengjinga |
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Description: 计算序列的DFT的快速算法-DFT calculated sequence of the fast algorithm
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Size: 1024 |
Author: 陈国栋 |
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Description: 加窗离散傅立叶变换，用DFT对离散信号进行谱分析，通过选用不同的加窗函数来抑制信号截断造成的频谱泄漏-windowed discrete Fourier transform, DFT right discrete signal spectral analysis, the increase in the alternative window function to curb the disconnect signal leakage spectrum
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Size: 1024 |
Author: 戴曙君 |
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Description: realize overlapped-add method
％[y]=overlpadd(x,h,Nfft)
％y:output sequence
％x:input sequence
％h:filter impulse response sequence
％Nfft:points of each DFT operation
％重叠相加法实现分段卷积-realize overlapped-add method% [y] = over lpadd (x, h, Nfft)% y : x% output sequence : % h input sequence : impulse response filter% Nfft sequence : DFT points of each operation% of the sum of overlapping sub-convolution Method
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Size: 1024 |
Author: 吴江华 |
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Description: Image Filtering RGB Spatial Wiener Direct Inverse Discrete Fourier Transform DFT Lucy Richardson Median Laplacian -Image Filtering RGB Direct Spatial Wiener Inverse Discrete Fourier Transform DFT Lucy Ri chardson Median Laplacian
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Size: 5120 |
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Description: DFT进行频谱分析时的三种现象
1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。
采样前加低通滤波器防混叠
2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。
改用其他窗函数（非矩形）改善泄漏。
3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。-DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.
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Size: 148480 |
Author: qinyang |
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Description: 基2FFT,是DFT(离散傅立叶变换)的快速算法-radix 2 FFT, DFT (Discrete Fourier Transform) Fast Algorithm
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Size: 1024 |
Author: Terry |
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Description: 主要是对图像实现DFT,DCT变换，利用二维小波分析对图像作二层小波分解，显示条状图，十字图及频谱等-Realize the image is mainly DFT, DCT transform, the use of two-dimensional wavelet analysis of images for the second floor of wavelet decomposition, indicating strip maps, charts and cross spectrum
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Size: 3072 |
Author: 袁辉 |
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Description: 对输入的数字图像进行二维离散傅立叶变换，由matlab实现-The input digital image to two-dimensional Discrete Fourier Transform, from matlab realize
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Size: 58368 |
Author: 刘勇 |
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Description: 基于DFT的瞬时测频算法，及插值算法，最后由图形表示测频结果。-Based on the Instantaneous Frequency Measurement DFT algorithm, and the interpolation algorithm, and finally by the graphical representation of frequency measurement results.
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Size: 1024 |
Author: 赵琦 |
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Description: 基于DCT,DFT,DWT等的水印算法，还有加置乱的水印算法，用于图像处理方面-Based on the DCT, DFT, DWT, such as the watermarking algorithm, as well as increase the watermark scrambling algorithm, for image processing
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Size: 16384 |
Author: 孔萍萍 |
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