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通信原理课程设计：语音信号基带通信传输系统仿真基于DPCM编码和循环码 (Communication Theory Course Design: speech signal base-band telecommunication transmission system simulation Based on DPCM coding and cyclic codes)

说明：  用Matlab产生随机拓扑图，优化并显示结果。(Matlab random topology map, optimization and display results.)

LDPC译码仿真实验 程序代码 simulingk仿真(LDPC decoder simulation simulation code simulingk)

transforms geodescial coordinates in geocentrical and vice versa

锁频环又称为自动频率控制（AFC）环，其利用反馈回路对输入频率变化进行调整，最后达到对频率的跟踪，广泛应用于雷达，卫星导航等领域对多普勒频率的跟踪。(Locked loop, also known as automatic frequency control (AFC) loop, the use of feedback loop to adjust the input frequency changes, and finally achieve frequency tracking is widely used in radar, satellite navigation and other fields on the Doppler frequency tracking.)

This is a matlab code of MTE protocol that simulates the life of the sensor network.

本论文采用理论与实践相结合的方法，对用MATLAB去分析线性系统，解决线性系统中的复杂问题做了详细的描述并进行了教学实验仿真。论文的具体内容主要包括：线性系统的时域分析、频域分析和利用MATLAB求解几个方面。(This paper expounds the use of MATLAB software for linear system principle simulation experiment: the temporal domain analysis and analysis in frequency domination area of linear system , )

说明：  梯度下降法是一個一階最佳化算法，通常也稱為最速下降法。 要使用梯度下降法找到一個函數的局部極小值，必須向函數上當前點對應梯度（或者是近似梯度）的反方向的規定步長距離點進行疊代搜索。如果相反地向梯度正方向疊代進行搜索，則會接近函數的局部極大值點；這個過程則被稱為梯度上升法。(The gradient descent method is a first-order optimization algorithm, also commonly referred to as the steepest descent method. To find the local minimum of a function using the gradient descent method, an iterative search must be performed to the specified step distance point in the opposite direction of the gradient (or approximate gradient) of the current point on the function. If the search is reversed in the opposite direction to the positive direction of the gradient, it will approach the local maximum point of the function; this process is called the gradient ascent method.)

matlab环境实现播放卡农，利用音频处理工具(Matlab environment to achieve playback Canon)

matlab的张量工具箱，方便使用，添加到库中就可以，可以方便实现关于张量等多维信息的计算(helpful for your tensor calculation)