assignment2

采用信号包络和差分方式进行信号模式识别，可对QPSK，BPSK，AM，FM方式识别(The use of signal envelope and differential mode signal pattern recognition, can QPSK, BPSK, AM, FM identified)

OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM Multi-CarrierModulation，多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开，这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。本程序实现OFDM与QPSK技术的比较(This program realization technology and the OFDM QPSK technology)

Matlab programs for energy detection

这是根据提交的亚历山大Gramfort的“MATLAB的网状到PDF与三维交互对象“。他的计划将允许网数字转换成3D PDF格式。然而，他的代码只允许一个层进行转换，并不会启用的透明度。 本意见书不创建最终的PDF。它产生的U3D文件，然后可以使用到PDF的Adobe Acrobat Pro文件插入。本文件还允许多层网格，以创建，并为每个层的透明度指定。 此代码包含一个函数（installGoogleArchive.m），它会自动下载并安装所需的中间数据格式转换（IDTF）进入最后的通用3D（U3D）文件的二进制文件。此代码还只包括转换器的Windows版本。(This submission is based on Alexandre Gramfort s "matlab-mesh-to-pdf-with-3d-interactive-object". His program allows meshes to be converted into 3D PDF figures. However, his code only allows a single layer to be converted, and does not enable transparency. The present submission does not create the final PDF. It generates the U3D file which can then be inserted into a PDF file using Adobe Acrobat Pro. This submission also allows multilayer meshes to be created, and for the transparency of each layer to be specified. This code includes a function (installGoogleArchive.m) which will automatically download and install binaries required to convert the intermediate data format (IDTF) file into the final Universal 3D (U3D) file. This code also only includes the windows version of the converter.)

设计低通数字滤波器，要求在通带内频带低于 时，允许幅度误差在1dB以内(Design of digital low pass filter, requirements in the passband frequencies below, allow a margin of error of less than 1dB,)

IEC协会推荐的电压波动和闪变的MATLAB计算模型，并含IEC标准（这个标准很难找到免费的）(IEC Association recommended voltage fluctuations and flicker MATLAB computing model, and with the IEC standard (this standard is difficult to find for free))

HYSTERESIS PLOTTING FROM MATLAB Example case: a very simple case with MATLAB as the graphical output interface. WARNING * This case only works if you use the Compaq/Intel Fortran Compiler.

Topology description function topology optimization matlab

matlab_workshop channel coding

模拟退火算法，解决旅行最短路径问题，matlab程序(Simulated annealing algorithm to solve traveling the shortest path problem, matlab program)