sea-surface-modeling-

说明：  数字音乐MATLAB处理，可以在MATLAB下进行混音，回响，延时，乐器的更改(Digital music MATLAB processing, can be carried out under the MATLAB mixing, echo, delay, musical instruments of change)

这是一本信号与系统方向的圣经，我这里上传上来，希望对大家有用。(It is a bible in the aspect of signal and system. I upload it and want to share with people who need it and hope to help him/her.)

读取星历观测文件GPS和北斗卫星的可见卫星数作为输出(read ephemeris observation file to give out GPS and Beidou visible satellite number)

通信课程设计 MATLAB下编程的 信号调制与解调相关程序等，希望与大家分享。(Communications curriculum design under MATLAB programming signal modulation and demodulation and other related procedures, I hope to share with you.)

说明：  对一副图像进行对数极坐标变换，为fourior-mellin变换作准备，将旋转参数转化为平移参数(Images on a logarithmic polar coordinate transformation for fourior-mellin transformation to prepare the rotation parameters into the translation parameters)

适合卫星通信本科学生借鉴。主要为卫星转发器仿真设计。可以实现上下变频，非线性放大器实现和卫星转发器实现。(Satellite transponder Simulation Design。Achieve Frequency conversion)

说明：  spwvd算法的程序代码，非常实用 在毕设中需要用到跳频信号的应该都能用到该代码(Smooth pseudo Wigner distribution)

Cyclo Converter- fixed ac to variable freq and voltage ac with simple simulation circuits

PID算法，通过PID控制温度，实现PID自整定(PID algorithm, temperature, PID self-tuning PID control)

matlab 代码，实现softmax的多分类(Matlab code, the realization of softmax classification )