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Description: vb版本的fft变换，能够正反变换。正变换：
把时域信号转换成频域信号，反变换：能够把频域信号转换成时域信号。fft可广泛应用于工程领域，例如：信号的频域分析。震动，噪声的分析等等。-vb version of the fft transform, to transform pros. Transformation : put time domain signal into frequency domain signal, anti-transformation : can frequency-domain signal into time domain signal. Fft can be widely used in engineering fields, such as : the frequency-domain analysis. Vibration, noise analysis, and so on.
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Size: 2775 |
Author: zxf |
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Description: 数字图象处理算法的演示，包括：图象的DFT和逆DFT，图象的FFT和逆FFT，在图象中加入正弦噪声，图象的模板运算实现图象平滑和锐化等等。-digital image processing algorithms demo, including : Image DFT and inverse DFT, FFT image and inverse FFT, in the image by adding sinusoidal noise, the template image Operational Image sharpening and smoothing and so on.
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Size: 277504 |
Author: wysh |
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Description: vb版本的fft变换，能够正反变换。正变换：
把时域信号转换成频域信号，反变换：能够把频域信号转换成时域信号。fft可广泛应用于工程领域，例如：信号的频域分析。震动，噪声的分析等等。-vb version of the fft transform, to transform pros. Transformation : put time domain signal into frequency domain signal, anti-transformation : can frequency-domain signal into time domain signal. Fft can be widely used in engineering fields, such as : the frequency-domain analysis. Vibration, noise analysis, and so on.
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Size: 2048 |
Author: zxf |
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Description: 用途：数字图象处理算法的演示，包括：
• 图象的DFT和逆DFT
• 图象的FFT和逆FFT
• 在图象中加入正弦噪声
• 图象的模板运算实现图象平滑和锐化
• 图象的直方图均衡化
• 图象的对比度拉伸
• 图象的中值滤波
• 图象灰度直方图的显示
• 若干频域滤波器
• 图象的镜像
• 图象的旋转（90度与任意角度）
• 图象的放缩
• 其它小算法
-purposes : digital image processing algorithms demo, including : Image# 8226 DFT and inverse DFT Image# 8226 FFT and inverse FFT# 8226 in the image by adding noise sine# 8226 Image Computing template image sharpening and smoothing# 8226 image histogram equalization# 8226 the contrast of the image# 8226 tensile image median filter# 8226 image histogram display# 8226 some frequency-domain filter image# 8226# 8226 mirror image rotation (90 degrees and arbitrary angle) images# 8226# 8226 Zooming other small Algorithm
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Size: 311296 |
Author: 例为 |
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Description: 两个滤波器的代码，以及一个应用带通滤波器降噪的主程序，使用matlab制作了滤波器，滤波效果一般-two filter code, and application of a band-pass filter and noise reduction program, the use of Matlab produced a filter, filtering effect of general
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Size: 1024 |
Author: zz |
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Description: 比较了FFT算法和低通滤波器在去除噪声中的作用-compared the FFT algorithm and low-pass filter to remove noise in the role
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Size: 51200 |
Author: 陈圣 |
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Description: QPSK Transmitter and I/Q Correlator Receiver is based on the technique of queing the information in a bit stream and on the receving end using FFT and some additive filters, as the addition of noise is made to infuse the need of a filter. Necessarily a Baseband filter is used. Modulation acheived at the receiving end.
-QPSK Transmitter and I/Q Correlator Recei ver is based on the technique of the infor queing mation in a bit stream and on the receving end usi ng FFT and some additive filters, as the addition of noise is made to infuse the nee d of a filter. Necessarily a Baseband filter is u sed. Modulation achieved at the receiving end.
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Size: 4096 |
Author: xiaoying |
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Description: 本人做的GPS并行码捕获的算法.用的是1024点FFT,原始数据可以假如不同功率的噪声.-GPS parallel code acquisition algorithm. Using a 1024-point FFT. If the original data can be different noise power.
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Size: 21504 |
Author: 朱广清 |
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Description: • To design a GUI in MATLAB for Dual-Tone Multi-Frequency (DTMF) telephone key pad, including DTMF Signal generator and DTMF tone detector
• To simulate the DTMF signals with noise based on the specifications given.
• To decode and display the DTMF signals by using FFT algorithm
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Size: 16384 |
Author: 冯扬 |
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Description: 1.matlab编程，实现函数的倒排序；
2.程序实现FFT,傅立叶逆变换；
3.一个图像处理程序，添加噪声，去噪。
-1.matlab programming, realize inverted sort function 2. Procedures realize FFT, inverse Fourier transform 3. An image processing program, add noise, de-noising.
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Size: 1024 |
Author: clw |
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Description: 编程实现图像傅立叶变换和反变换，实现图像去除噪音-Programming image Fourier transform and inverse transform, image de-noise
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Size: 183296 |
Author: 郑文 |
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Description: 对正弦信号进行FFT变换 画频谱图，进行频谱分析，可以计算出信噪比-Sinusoidal signals of paintings transform FFT spectrum chart, spectrum analysis, signal to noise ratio can be calculated
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Size: 1024 |
Author: 左晓伟 |
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Description: 信号被白噪声干扰，对该信号进行采样，利用傅立叶变换对其频率进行分析。-Signal is white noise interference, the signal sampling, the use of Fourier transform of its frequency analysis.
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Size: 18432 |
Author: yuanjia |
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Description: 语音降噪。从Codec AD50采集话筒语音，通过DSP TMS320vc5402处理，在送到AD50输出降噪后语音，涉及加汉宁窗，切比雪夫滤波器，快速傅立叶变换和反FFT，有声无声判断谱分解，谱合成等功能-Voice noise. Codec AD50 collected from the microphone voice, through the DSP TMS320vc5402 treatment, in AD50 to the output noise after the voice, involve Hanning windows, Chebyshev filter, Fast Fourier Transform and anti-FFT, audio silent judge spectral decomposition, spectral synthesis and other functions
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Size: 44032 |
Author: 黄胜华 |
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Description: 格式 [sqnr,a_quan,code]=u_pcm(a,n)
输入样值序列a 、量化电平数目n, 程序计算量化间隔、进行均匀量化、进行编码、计算量化信噪比， 返回量化信噪比squn、编码前的量化序列a_quan、编码后的码序列code。
-Format [sqnr, a_quan, code] = u_pcm (a, n) input sample value sequence a, the number of quantization levels n, the calculation procedures to quantify interval, the uniform quantization, coding, computing quantization noise ratio, return quantization noise ratio squn, to quantify the pre-coding sequence a_quan, coding sequences after the code.
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Size: 1024 |
Author: wx |
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Description: fft1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图-fft1. Using Matlab generated sine wave, rectangular wave, as well as the white noise signal, and display their respective time-domain waveform of Figure 2. FFT to transform, showing their frequency spectrum, including sampling rate, frequency, data length of 3-on-demand. Make the rms signal of the three maps, power maps, as well as the number of root-mean-square map 4. Fourier Transform IFFT with the restoration of signals, and displays the sinusoidal signal the resumption of time-domain waveform
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Size: 1024 |
Author: 李三 |
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Description: 利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。-Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.
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Size: 1024 |
Author: 云卷云舒 |
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Description: 快速傅里叶变换，产生信号，加噪声，并画出图象。(Fast Fourier transform produces signals, adds noise, and draws images.)
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Size: 9216 |
Author: 黎明的星星
|
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Description: 利用fft方法和pwelch方法在计算光纤水听器噪声功率谱时的对比程序(A comparison program for calculating the noise power spectrum of fiber optic hydrophone by using FFT and Pwelch methods)
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Size: 1024 |
Author: 定常流动 |
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Description: 对已测信号进行傅里叶变换，进行滤波器降噪，进行功率谱分析(Perform Fourier transform on the measured signal, perform filter noise reduction, and perform power spectrum analysis)
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Size: 2048 |
Author: 西门吹猪 |
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