xinhaoguji

二极管箝位五电平电路建模与仿真的mdl文件，本人所作作业，绝对可以运行。(Diode-clamped five-level circuit modeling and simulation mdl file, I made the job can definitely run.)

Kmeans algorithm using matlab

This is a kalman filter toolbox that supports filtering, smoothing and parameter estimation (using EM) for Linear Dynamical Systems.

fdtd+matlab one dimensional(fdtd+matlab code)

说明：  在信号中添加噪声，根据周期图法，估计信号功率谱(Add noise to the signal and estimate the signal power spectrum according to the periodic graph method)

一些matlab底下的小函数，详细见索引。直接解压，不用密码。(under Matlab some small function, see detailed index. Direct unpack, without a password.)

基于matlab的直序扩频通信系统仿真模型(Matlab-based direct-sequence spread spectrum communication system simulation model)

关于MATLAB的基本算法，涵盖数学计算的一些基本源程序(The basic algorithm of MATLAB, covering some basic math source)

说明：  matlab代码功能实现图像的距离变化，已经通过调试成功！(matlab code image of the distance function changes have been adopted successfully debug!)

DFT进行频谱分析时的三种现象 1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。 采样前加低通滤波器防混叠 2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。 改用其他窗函数（非矩形）改善泄漏。 3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)