grid_PWM

matlab tutorial for basic

第一步是计算输人信号单边功率谱密度（ESD）。使用快 ％速傅里叶（FFr）算法将信号从时域转换到频域。因为FFr算法的输出是离散谱，而这 ％里我们需要的是连续谱，因此需要引人不同的比例因子来实现从离散谱到连续谱的转换。 ％在第二步中，我们利用迭代算法计算出相对于特定阂值的ESD的最高和最低频率，从而 ％估算出被检测信号所占用的带宽。这种算法同时适用于基带信号和已调制信号。最后， ％在第三步中，我们给出了输出图形的原代码。(The first step is calculating the input signal unilateral power spectral density (ESD). The use of fast Fourier speed (FFr) algorithm for the signal conversion from time domain to frequency domain. FFR algorithm because the output is a discrete spectrum, which we need is a continuous spectrum, so the need for food of different scale factor to achieve from the discrete spectrum to continuous spectrum conversion. In the second step, we use iterative algorithm to calculate a specific threshold in relation to the ESD of the highest and lowest frequency, thus estimated to be occupied by the signal detection bandwidth. This algorithm applies to both baseband signal and modulation signals. Finally, in the third step, we give the graphical output of the original code.)

matlab工具箱里的程序函数总概与解释(Matlab toolbox functions Lane procedures and interpretation sum)

MATLAB不提供现成指数拟合函数，一方面由于但可以轻松通过多项式拟合转化而来，但是使用上还是不如有一个函数方便，所以特写这样一样简单实用的函数(MATLAB does not provide ready-exponential fit function, by hand because it can be easily transformed a polynomial fit, but still not as good as there is easy to use a function, it is as simple close-up of such useful functions)

This program plots sensitivity of OFDM subcarriers with Carrier frequency offset(CFO)

设计了对于数字预失真的仿真程序，应用LMS急降方法实现系数更新，对失真有很好的效果(Designed for digital pre-distortion simulation program, the drop of the LMS coefficient update method implementation, have a good effect on the distortion)

用matlab来实现fir滤波器，包括矩形窗、汉宁窗、汉明窗、等波纹法！(Using matlab to achieve the fir filter, including the rectangular window, Hanning window, Hamming window, such as corrugated Act!)

Spread Spectrum Technique simply consumes spectrum in excess of the minimum spectrum necessary to send the data.

Generates a central-composite design of experiments.

交流电机调速系列教材之一交流电机调速理论(AC Motor Speed Control Series of motor control theory textbooks)