psk_after_awgn_ch

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)

Hi Friends. This is simple demo of Sobel Operation on image.

基于MATLBA的无刷直流电机仿真，使用新版MATLAB可以运行(MATLBA-based simulation of the brushless DC motor, using the new version can run MATLAB)

Forward kinematics of the Robotic arm

一个BP神经网的学习过程，实现预测功能。(A BPN )

最优化实验，用的是MATLAB，题目不是很难主要是练习用，学会对实际问题进行数学抽象。 掌握常用的最优化算法。 运用相关数学软件设计程序进行求解。 (optimization experiments, using the MATLAB, the main topic is not difficult to practice with. learn to practical issues abstract mathematics. Master of the most commonly used optimization algorithm. Related to the use of mathematical software for the design process.)

In order to model the chaotic motion of the double pendulum,i am going to use Matlab solving the problem using numerical methods such as Rung-Kutta and Ordinary Differential Equations (ODE).

matlab 读取stl文件,输出顶点、面、法向量(matlab read stl file)

相当经典的数据仿真，利用matlab实现，很好的例子啊 是pdf(Quite a classic data simulation using matlab to achieve good example is the pdf)

使用matlab进行编程实现卡尔曼滤波器(Kalman filter matlab programming)