b46616a9dd5c

ofdm在高斯白噪声中的传输和衰减以及ofdm导频的添加(ofdm transmission and pilot add white Gaussian noise)

matlab实现基于时域有限差分法模拟电磁传播的源代码(matlab source code to achieve based on the Finite Difference Time Domain Simulation of Electromagnetic Propagation)

本程序主要通过仿真动态显示均匀平面电磁波中，磁场 Hz 的波阵面在自由空间（理想介质）中的传播。(The program primarily through dynamic simulation shows uniform plane wave, the magnetic field Hz wavefront in free space (ideal medium) in the transmission.)

一个完整的PSO程序，可以实现优化，并且由很好的可视化见面，且可用来调节PID参数(A complete PSO program, you can optimize, and met by a good visualization, and can be used to adjust the PID parameters)

MATLAB宝典 配套源文件,有相关书籍的话很适合大家学习(this is matlab .m source)

说明：  最小均方濾波器是一類可通過最小化誤差訊號之均方值而修正濾波器係數，以類比所需理想濾波器的自適應濾波器，其中作為修正依據的誤差訊號為理想參考訊號與實際輸出訊號之差。該種濾波器所用之最小均方法只以當前之訊號誤差值為準進行修正，是一種隨機梯度下降法。最小均方法係由斯坦福大學的Bernard Widrow教授及他的首位博士班學生Marcian Hoff於1960年提出。最小均方濾波器屬於常見的自適應濾波器種類之一。(The minimum mean square filter is an adaptive filter that can correct the filter coefficients by minimizing the mean square value of the error signal to analogize the desired ideal filter. The error signal used as the correction reference is the ideal reference signal and the actual output. The difference between the signals. The minimum averaging method used in this kind of filter is only corrected based on the current signal error value, which is a stochastic gradient descent method. The minimum mean method was proposed in 1960 by Professor Bernard Widrow of Stanford University and his first PhD student, Marcian Hoff. The least mean square filter is one of the common types of adaptive filters.)

contourlet变换源代码,图象处理方面有广泛应用空间-MATLAB source code that implements the contourlet transform and its utility functions. See paper "The contourlet transform: an efficient directional multiresolution image representation" included in this zip file. (Contourlet transform source code, image processing has a broad application of space-MATLAB source code that implements the contourlet transform and its utility functions. See paper )

本代码是基于MIMO-OFDM系统下做的信道估计技术的研究。MIMO,OFDM是4G的核心技术，两者相结合的估计算法也是现在研究的热点。本代码包括几种核心的估计算法并可直接仿真出结果。(The code is based on MIMO-OFDM system channel estimation to do research. MIMO, OFDM is the core of 4G technology, a combination of both the estimation algorithm is now a hot research. The code includes several core estimation algorithm and simulation results directly.)

求二值图的算法园程序，在指定的目录下输入图像名称，就可以在Matlab的M文件中运行得到图像的二值图，并输入图像对应的矩阵。根据轮廓下可以生成一个二值图，并把它的图像输出。(Figure 2 value seeking algorithms garden program, in the specified directory name of the input image, we can run Matlab M-file to be binary image map and the input image corresponds to the matrix. Contour may be generated according to a binary image, and to its image output.)

该程序完成的是通过使用所提供的链码（一种方向码）来画出链码所表示的轮廓。所画轮廓在原图上是黑色的线。(the code is used for draw the outline of the region of interest which is show by the chaincode)