wavelet

使用相关函数来检测信号序列中隐含的周期性(Using the relevant function to detect the implicit periodic of signal sequence.)

地震学绘制震源机制小程序,只要输入震源机制参数就能方便地用MATLAB绘制震源机制球(Program of focal mechanism )

64_Qam_modulation this code is a simulation of 64 QAM modulatiom for communication system in matlab

The false position method, Secant method, and Bisection method are term for problem-solving methods in arithmetic, algebra, and calculus. Credit : http://en.wikipedia.org/wiki/False_position_method http://en.wikipedia.org/wiki/Secant_method http://en.wikipedia.org/wiki/Bisection_method

通过给出的随机过程，该随机过程是由3个实正弦信号组成，归一化频率分别为0.1,0.25,0.27，其中相位是相互独立在【0,2*pi】上分布的随机相位；噪声是均值为0、方差为1的实高斯白噪声，信噪比为30db,30db,27db,观测样本数为N，通过bartlett法，Welch法，周期图法计算随机过程的概率谱(Given by stochastic process, the stochastic process is composed of three real sine signal, the normalized frequency were 0.1, 0.25, 0.27, including phase is independent in [0, 2* PI] on the distribution of random phase Noise variance is the mean to 0, 1 real gaussian white noise, signal to noise ratio of 30 db, 30 db, db, and the observation sample for N, by bartlett, Welch, periodogram spectrum method to calculate the probability of the random process)

APES谱估计方法的matlab源代码，已经通过验证(APES spectral estimation methods matlab source code has been validated)

说明：  信号时序幅频仿真图(timing signal amplitude and frequency simulation map)

将小波相邻系数相关性的降噪思想引入到冗余第2代小波中，提出了基于邻域相关性的冗余第2代小波降噪方法，该方法克服了传统阈值降噪没有考虑小波系数之间相关性的不足。(Aiming at fault feature extraction in the background of strong noise, a wavelet denoising idea by incorporating neighboring coefficients is introduced into redundant second generation wavelet case. A denoising method of redundant second generation wavelet using neighbor dependency is presented. It overcomes the deficiency of traditional thresholding approaches. In this method, an original signal is decomposed by redundant second generation wavelet, and the detail and approximation signals have the same length as the original signal. The detail signals at each scale are then processed by neighbor dependency. Finally, the approximation signal and processed detail signals are reconstructed by inverse transform of redundant second generation wavelet to realize the signal denoising. )

基于matlab采用mpeg压缩原理，实现对avi格式文件的解压缩(Matlab mpeg compression used on principle, to realize the decompressor avi format)

Multimedia Communication Systems I Sampling and Quantization