Doc1

OFDM对频偏比较敏感，提出了基于循环前缀的频偏估计方法(OFDM is relatively sensitive to frequency offset, frequency offset estimation method is proposed based on cyclic prefix.)

matlab在工程数学方面的应用教学文档，matlab是一款功能强大的软件，可以应用于多种领域，本文档着重介绍matlab在工程数学领域的应用。(matlab engineering applications in mathematics teaching document, matlab is a powerful software that can be used in a variety of areas, this document focuses on matlab projects in the field of mathematics.)

simulink model to demodulate fm signal

说明：  利用matlab 对随机信号进行 hdb3码编码(liyong matlab duixinhao jinxing hdb3 Coding)

一堆沙子的横截面，可以使用 Margolus 型邻居仿真，但运动规则不同。 规则： 元胞有 2 个状态。状态= 0 是空的，状态= 1 代表沙子。 在任何时间步长，一个粒子，可以在2x2 块中向着底部运动。可能运动如下 所示。墙壁和底部将阻止粒子继续运动。 为了让该运动略有随机性，我亦补充说一项规则，有时处于下落状态的两个元胞还旋转，直到所有的动作都完成。(Cross-section of a pile of sand, you can type using the Margolus neighborhood simulation, but the movement rules are different. Rules: There are two cellular states. State = 0 is empty, state = 1 for sand. At any time step, a particle can be in the 2x2 block toward the bottom of the movement. May exercise the following. Walls and bottom to prevent the particles continue to campaign. To make the campaign a little random, I also added a rule, sometimes in the falling state of the two cell also rotate until all actions are completed.)

说明：  利用鱼群算法优化BP神经网络权值，该代码可以直接运行。(Fish swarm algorithm is used to optimize the weight of BP neural network, and the code can run directly.)

Binary Phhase Shhift Keying BER in MATLAB

A test script indicating how to find the appropriate frequency spectrum of a time dependant signal using Matlab. An associated function is also included.

说明：  图像识别 安全帽检测 安全帽识别 用于安全帽的检测任务(Image recognition helmet detection helmet recognition for helmet detection task)

电磁计算中的矩量法，用以计算偶极子和方环天线的输入阻抗等天线参数(Electromagnetic calculation method of moments to calculate dipole and square loop antenna input impedance antenna parameters)