pijian

SGP4官方程序,包括matlab，java，C++等源码和说明文件(Official program of SGP4 model,includes Matlab, VC, Java, etc.)

一维电阻率模拟Matlab源代码，很好的Matlab滤波源代码资料(a Matlab program to model 1D complex resistivity effects in electrical and electromagnetic surveys)

用matlab编写的一个扩频通信的一个仿真，很好的说明了扩频系统的工作原理！(communication simulation systems, including the analysis of Spread spectrum)

求解常微分方程组的bvp解算器的使用说明和教程和实例(tutorial and documentary and examples for ODE bvp)

Some useful wireless communication lectures 3.

OFDMA 物理层开发的matlab 源码.飞思卡尔提供.包括manger和SP两个部分。802.16e仿真，MATLAB环境(OFDMA physical layer development matlab source code. Freescale offers. The development of the physical layer was a great help, too spent to buy the rice yo! ! !)

用matlab制作的一个有趣程序，内容为打气筒打气球的动画演示。(Using matlab produced an interesting program, says playing balloon pump animation.)

画出AR谱，使用LevinsonDurbin算法，可以直接运行(AR Spectrum using LevinsonDurbin)

此文件为MATLAB的M文件，文件包含一个function为GUASS消元法，可以求任意阶数的线性方程组的解。(This file MATLAB M-files, the file contains a function for GUASS method of elimination, you can seek the solution of the linear equations of any order.)

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)