Untitled

此代码为pi/4-dqpsk的调制解调算法，用MATLAB实现，采用插分解调，简单实用(pi/4-dqpsk this code for the modulation and demodulation algorithm in MATLAB, transfer took decomposition, simple and practical)

CharArrayWriter extends Writer Source Code for Andriod.

说明：  function [Sx,f,alpha] = Sa(s,fs,M,N,read_f,del_f) 计算信号的循环谱 [Sx,f,alpha] = Sa(s,fs,M,N,read_f,del_f) 输入： s 序列 fs 采用频率 M 滑动频率窗长 N fft计算点数 read_f 可视频率（一般为载频的整数倍） del_f 可视频率间隔 输出： Sx 信号的循环谱 f 频率轴 alpha 循环频率轴(Cyclosationary Spectrum)

关于电动汽车充电桩对电网的影响，电动汽车的接入电网时间分配和优化。(About electric vehicle charging pile for power grid, the influence of electric vehicles connected to the electricity grid time allocation and optimization.)

matlab精彩编程100实例，主要是关于数学函数的。(One hundred examples of good programming matlab, mainly about the math function.)

有多普勒频移的海底混响单元散射模型（matlab）(the seafloor reverberation unit scattering model with Doppler frequency shift)

ncut algorithm matlab

说明：  这是一个MATLAB源代码，可以直接进行GPC仿真。(This is a MATLAB source code can be directly GPC simulation.)

用一个实例来学会matlab界面编程，简单易学(Use an example to learn matlab programming interface, easy to learn)

说明：  用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图 进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选 做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱 用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图(fft analysis,plot rms spectrum,power density spectrum, etc.)