Noncoherent_multiple

基于小波变换的数字水印嵌入的Matlab源代码及仿真(Based on Wavelet Transform Digital Watermarking of Matlab source code and simulation)

MM1K protocol simulation

select keypad for dtmf tone

Series active filter

使用样本协方差矩阵求逆方法仿真的波束图。使用的是均匀线列阵，信号方向为10度，有噪声，没有干扰。(Using the sample covariance matrix inversion method for the simulation beam pattern. Using a uniform linear array, the signal direction of 10 degrees, there is noise, no interference.)

基于BP神经网络对联合循环发电厂每小时满负荷电功率进行建模。(BP neural network based on a combined cycle power plant of electric power per hour at full load modeling.)

课程设计时编写的matlab程序代码，模拟数据分析处理的过程，研究生时的现代信号处理的作业。( Course designed to prepare the matlab program code, Analog data analysis processing, Modern signal processing jobs when the graduate.)

说明：  matlab gui入门视频，希望给大家学习有帮助(matlab gui entry video, I hope to help them to learn)

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.)

a matlab code about estimating model order with AIC criteria in modeling