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DFT进行频谱分析时的三种现象
- 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
cs.rar
- 压缩传感理论的一个简单例子，首先对信号进行稀疏采样，然后利用MP算法对信号进行重建。,Compressed sensing theory of a simple example, first of all, the signal sparse sampling, and then use MP algorithm of signal reconstruction.
ADC
- 该matlab程序验证了信号处理中delta-sigma ADC的效果，在过采样和delta-sigma单次循环后得到的图象性噪比提高。-The matlab program verification of signal processing in the effect of delta-sigma ADC, and the over-sampling delta-sigma a single image obtained after cycles of noise ratio increase
CWsinal
- matlab绘制CW信号的时域波形，同时对信号进行频谱分析，并考察采样频率以及信噪比对频谱分析的影响。-matlab draw CW signal time-domain waveform, and spectral analysis of signals and the sampling frequency and signal to noise ratio study of the impact of spectrum analysis.
LPM
- 用matlab绘制线性调频信号的时域波形，同时对信号进行频谱分析，并考察采样频率以及信噪比对频谱分析的影响。-Matlab drawing with linear frequency modulation signal time-domain waveform, and spectral analysis of signals and the sampling frequency and signal to noise ratio study of the impact of spectrum
maikuan
- 对采样进来的数据进行提取，并对其分析，从而进行自适应的信号脉宽提取-The sampling of incoming data extraction, and analysis of adaptive signal extraction pulse width
test
- 再抽样后，调制前，信后总要先被量化。这里提供一段程序用于解决这一问题。-after sampling, we always need to quantize the signal in order to do the modulation. here i provide a segment of code which can solve this problem
keyasuochuangan
- 对可压缩的信号可通过远低于Nyquist标准的方式进行采样数据，仍能够精确地恢复出原始信号，对图像处理具有重要意义。-On the compressible signals can be well below the Nyquist sampling data standard manner, is still able to accurately restore the original signal, the image processing is important.
generating-white-noise
- 编程产生一组正态分布的白噪声信号,它的均值和方差以及长度可随意调整。将产生的白噪声信号存入数据文件。 本程序算法用C++语言编写。首先用乘同余法产生均匀分布白噪声，再用变换抽样法转换为高斯分布白噪声 -Program produces a set of normal white noise signal, its mean and variance, and the length can be adjusted. Will produce a white noise signal int
Lesson-7
- Digital Signal Processing deals with algorithms for handling large chunk of data. This branch identified itself as a separate subject in 70s when engineers thought about processing the signals arising from nature in the discrete form. Developme
pix
- 1／2亚取样图像信号的自适应内插.pdf，数字图像处理，H.264学习研究必须了解的基础知识-1/2 sub-sampling the image signal adaptive interpolation. Pdf, digital image processing, H.264 study and research to understand the basics
hc971
- 用matlab实现提高采样率(插值)信号的生成，已达到增强图像的性能-Matlab enhancing sampling rate (interpolation) signal generation, has reached enhance the image and performance
tutorial-compression-perception
- tutorial压缩感知代码。压缩感知，又称压缩采样，压缩传感。它作为一个新的采样理论，它通过开发信号的稀疏特性，在远小于Nyquist 采样率的条件下，用随机采样获取信号的离散样本，然后通过非线性重建算法完美的重建信号-The tutorial compression-aware code. Compressed sensing, also known as compressed sampling, compressed sensing. It as a new sampling theory
3-Sampling-Theory-
- 3多通道,多试样率公式。抽样理论在信号和图像处理的国际期刊83 _nelson_stsip 2(1)83 - 96-3 A multi-channel, multi-sampling rate theorem . Sampling Theory in Signal and Image Processing An International Journal 2(1) 83-96 2003_nelson_stsip
Wavelet_OMP_WD
- 压缩感知，通过开发信号的稀疏特性，在远小于Nyquist 采样率的条件下，用随机采样获取信号的离散样本，然后通过非线性重建算法完美的重建信号-Compressed sensing, through the development of signal sparse characteristics, in the condition of far less than the Nyquist sampling rate, the use of random sampling to obtain the
myfft
- 求频谱的函数fft, x为输入信号，fs为采样频率,y为fft后的数据-The function of the spectrum fft, x for the input signal, fs for the sampling frequency, y is fft after the data
gw551
- Multirate signal processing, Sampling from a priori probability, calculate the weight, Modern signal processing jobs when the graduate.