S2FUN_PMSM

this file is matlab code for simulating msk modulation

基于EMD的直流电机换向电流提取程序。内含用LEM公司的霍尔传感器实测的微型直流电动机启动时的电流信号（真实的数据和大家分享），分别用小波滤波和EMD消噪，并用EMD提取直流分量、高频换向电流，对研究电机间接测速、启动特性测试很有帮助，对电机故障诊断也有帮助。(EMD-based DC motor commutation current extraction procedures. LEM s included with Hall sensors measured miniature DC motor start-up current signals (real data and to share), respectively, with wavelet filtering and EMD de-noising and extracted DC component with EMD, a high-frequency current commutation of indirect research motor speed, starting characteristics testing is helpful, for motor fault diagnosis can also help.)

计算离散时间信号间卷积和，并确定卷积信号的起止时刻点 信号处理卷积例程(convolution routine for signal processing % -------------------------------------------------- % [y,ny] = conv_m(x,nx,h,nh) % y = convolution result % ny = support of y % x = first signal on support nx % nx = support of x % h = second signal on support nh % nh = support of h)

The code summerize how to calculate the jitter (RMS) with the incoming signals, such as optical communications and clock and date recovery circuit

采用MATLAB实现常见信号的波形及代码，非常的实用(It s myself)

3 fisrt parts are: Download the file Square.tif and answer the following questions: i. Smooth the image with a 3 􀵈 3 spatial filter. ii. Smooth the image with an implementation of Gaussian filter in frequency domain. Change the bandwidth of the filter and show how these changes affect the result.

雷达方程仿真程序，包括基本的雷达距离方程，雷达能量方程，脉冲压缩处理等-radar function simulation code, including basic radar range function, radar power function, pulse compress processing(The radar equation simulation program, including basic radar range equation, radar energy equation, pulse compression processing-radar function simulation code, including basic radar range function, radar power function, pulse compress processing)

说明：  使用matlabR2007a编写的分类回归树代码，已经调试，可以运行(Prepared using matlabR2007a code classification and regression trees have been debugging, you can run)

QPSK-MBOFDM发射接收机 QPSK调制的多频带OFDM（MB-OFDM）发射机，经过加性高斯噪声信道，接收机判断误码率。 (QPSK-MBOFDM launch QPSK modulation receiver multiband OFDM (MB-OFDM) transmitter, through the additive Gaussian noise channel, the receiver determine the error rate.)

for Generating Random Number