matlab-chepia-tiju

Matlab官方文档：Matlab编程技巧(Matlab official documents : Matlab programming skills)

傅里叶变换与逆变换, Matlab程序。The main focus of this lab lab is converting between the frequency and time domain. (Fourier Transform Forward and inverse)

4QAM、16QAM、32QAM、64QAM、128QAM、256QAM星座图映射，map、频偏估计算法(4QAM, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM constellation mapping, map, frequency offset estimation algorithm)

采用MMSE准则设计最佳均衡器的源程序，提供给大家作为参考。用此程序可以基于此设计最佳的均衡器。(Guidelines for the use of MMSE equalizer design the best source available to everyone as a reference. Using this procedure can be based on this design the best equalizer.)

说明：  this code simulate sluted aloha protocol.

一种Turbo编码的MATLAB仿真实现 通过使用MATLAB软件仿真实现了Turbo码编码,提高了对其高效优质的编码效率的认识(A MATLAB Simulation of Turbo codes to achieve through the use of MATLAB software simulation to achieve a Turbo-Coded, improve the quality of its high efficiency of the coding efficiency)

这是用C语言编写的灰度直方图，在matlab软件下可以运行。不是用imhist直接调用。(It is written in C language histogram in matlab software can run. Not called directly by imhist.)

CCNA Exploration 4.0.5.0 Routing Protocols and Concepts Instructor Packet Tracer Lab Manual (answers)

基于EKF的参数估计算法理论，这是个英文文献，主要介绍了用EKF方法去识别结构的参数。(The parameter estimation algorithm based on EKF theory, this is English literature, introduces the parameters EKF method to identify structures.)

研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散 余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的 K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角 阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这 反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特 性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。 虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。 (Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect. Although from related to the performance of the sense, DCT is a kind o)