zunizhdong

LFM，PSK，线性调频-相位编码等雷达信号的产生 杂波(generation of the LFM,PSK signal and clutter)

格兰杰因果检验：检测两个样本之间的因果关系，常用到预测中(Granger causality test: detecting causal relationship between the two samples, used to forecast)

连续语音识别的隐马尔科夫Matlab源代码(Continuous Speech Recognition of Hidden Markov Matlab source code)

digital communication solution

使用低通滤波器从含有噪声的信号中提取有用的正弦波 (见实验指导书 实验九 数字滤波器中的第一题) 目的：用数字滤波器从含有高频噪声的采样数据中提取正弦信号。 要求：①输入信号为一正弦波，并加入一个白噪声的干扰来模拟信号传输中的随机干扰信号（用以模拟含有噪声采样序列）。 （模拟含有噪声采样序列具体可用正弦波信号叠加高频噪声来实现，为了使滤波效果明显，本实验的高频噪声是用高频均匀分布白噪声（Uniform）通过Butterworth高通滤波器过滤生成的，高通滤波器的截止频率设为10倍输入信号频率。） ②在程序中设计一个低通巴特沃斯滤波器，以滤除信号中的噪声分量，提取输入的正弦波信号 。 ③可调节信号滤波器的截止频率和阶数，可显示滤波前与滤波后的时域信号。 ④给出滤波前与滤波后的频谱特性的显示。 (Using low pass filter extracting useful sine wave signal containing noise(see experiment instruction digital filter in the first nine questions)Objective: to use digital filter sampling data extract containing high frequency noise sine signal.Requirements: (1) the input signal is a sine wave, and add a white noise interference to simulate the random disturbance signal of the signal transmission (to simulate contains noise sampling sequence).(simulated the sampling sequence contains noise available sine wave signal superposition of high frequency noise, in order to make the filtering effect is obvious, the experiment of high frequency noise is Uniform distribution with high frequency white noise (Uniform) by Butterworth high-pass filter to filter generated, high-pass filter cutoff frequency set to 10 times the size of the input signal frequency.)(2) in the program design a low-pass butterworth filter, in order to filter out the noise in the signal component, extract the input sine wav)

3点高斯积分法，亲测，好用，欢迎分享改进(At three in the gauss integral method, measurement, useful, welcome to share improvement)

4 Matlab ebook in pdf for engineering students, useful to learn matlab software

说明：  描述了石墨烯电导率与弛豫时间的关系，谐振波长与基底折射率的关系。(The relationship between the conductivity of graphene and the relaxation time, the relationship between the resonance wavelength and the refractive index of the substrate are described.)

该为matlab详尽学些资料第八章“函数分析”(Learn some of the detailed information for the matlab Chapter 8, " functional analysis" )

一种基于调制域分析的过零检测算法改进，克服了传统过零算法不能应用于某些信号的局限，有MATLAB仿真(Zero-crossing detection algorithm based on improved modulation domain analysis, to overcome the traditional limitations of the zero crossing algorithm can not be applied to certain signals, there are MATLAB simulation)