Time_varying_chennel

此程序是音乐门铃程序，希望能对大家有多帮助！(This program is program music doorbell, hoping to tell you how to help!)

About correlation. In signal processing, cross-correlation is a measure of similarity of two waveforms as a function of a time-lag applied to one of them. This is also known as a sliding dot product or inner-product. It is commonly used to search a long duration signal for a shorter, known feature. It also has applications in pattern recognition, single particle analysis, electron tomographic averaging, cryptanalysis, and neurophysiology.

this source code for particle swarm optimization

基于IIR滤波器的costas环的simulink实现，区别于不同的costas环，可以实现通信系统的载波同步，可以直接在matlab上打开实现，对于通信系统的同步问题的学习和设计(IIR filter based on simulink realization of costas loop, different from the various costas loop, carrier communication system can be achieved simultaneously, you can open directly in matlab implementation, the synchronization of communication systems for the study and design)

power_transfo3wdn.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_transfo3wdn.rar,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

由matlab解决多旅行商问题，并且包括矩阵计算等功能(From matlab to solve multi-traveling salesman problem, and includes features such as matrix calculation)

数字信号处理教材第三版中的第一章中的程序(dsp of chapter1)

发散的一个新的Rauch-Tung-Striebel形式容积卡尔曼平滑了非线性状态空间模型采用求容积法为最优平滑转换(A new form of Rauch-Tung-Striebel volume divergence Kalman smoother nonlinear state space model using the volumetric method for seeking the optimal smooth transition)

convert RGB color space to Lab color space

从MIDI文件中读取多基频，用于检测多基频的提取，是一个很好的方法，大家可以借鉴一下(MIDI multipitch )