exam4_2

many matlab code with Fftseq ,uniform to gauss AM DSB FM modulation

a document about Emgu CV learning. good luck

FEM1D_SPECTRAL_NUMERIC is a MATLAB program which applies the spectral finite element method to solve the problem u = - pi^2 sin(x) over [-1,+1] with zero boundary conditions, using as basis elements the functions x^n*(x-1)*(x+1), and carrying out the integration numerically using MATLAB s quad() function. This function solves the problem u = - pi^2 * sin( pi * x ) for x in (-1,1), with boundary conditions u(-1) = u(1) = 0.

说明：  有三种算法，分别是cmeans、fcm和som等对如iris和usps等数据的聚类。(There are three algorithms, cmeans, FCM and SOM to cluster data such as iris and USPS.)

介绍了原型滤波器的设计，并比较了不同混叠因子下滤波器的性能(this code include the design of the prototype filter,which is widely used in the multicarrier communication.we also compare the performance with different coefficient.)

利用matlab实现简易的MIMO系统仿真，其中包括AWGN信道和瑞利信道的2发2收有无信道编码的比较，以及1发2收。(Using matlab to achieve a simple MIMO system simulation, including the relatively AWGN channel and Rayleigh channel of the two 2 admission with or without channel coding, as well as a 2 admission.)

低频信号先进行放大，再调制解调，设计发射机和接收机(Low-frequency signal is first amplified, and then modulation and demodulation, the transmitter and receiver design)

在MATLAB环境中，得到语音信号的散点图，STFT变换和小波包变换。(In the MATLAB environment to obtain a scatter plot of the speech signal, STFT transform and wavelet packet transform.)

DRAM算法，是一种改进型的蒙特卡罗马尔科夫链（MCMC）采样方法，该算法基于经典的MCMC算法，在此基础上增加了改进策略，是算法能够更快速稳定的收敛。(DRAM algorithm is an improved Mirkov chain (MCMC) sampling method, the algorithm is based on the classic MCMC algorithm, based on the increase in the improvement of this strategy is the algorithm to more rapid and stable convergence.)

采用点门限玻尔兹曼机实现对图像的自动特征提取以及特征选择。(Point-wise gated boltzmann machine was adopted to realize automatic feature extraction and feature selection of images.)