2776matlabwatershed

介绍如何用matlab设计fir滤波器，很详细！！！！！！！！！！！！！！！！！(A great progress in the discipline of digital processing is the research on design method of digital filter. FIR digital filter plays a significant part in the processing of digital signal because it can realize linear phase so conveniently that the group delay doesn’t vary with frequency. In the modern electrical system, the FIR digital filter is applications for its good linear phase character.)

本代码是利用dwt小波分析，实现了对音频加入灰度水印的源代码，可直接运行，生成两个音乐文件，一个是嵌入声音后的，另外一个是噪声文件。(This code is the use of wavelet analysis dwt, the realization of audio into grayscale watermark source code can be run directly, generates two music files, one after the embedded voice, the other is the noise file.)

matlab S函数学习，举例仿真，可供初学参考着学习。(matlab S function to learn, for example simulation, for beginners reference of learning.)

that is useful code for communication

FIR与IIR滤波器在DSP上的实现.　　　DSP是利用计算机或专用DSP处理器，以数字形式对信号进行采集、变换、滤波、估值、增强、压缩、识别等处理，以得到符合人们需要的信号形式。FIR(Finite Impulse Response)滤波器：有限长单位冲激响应滤波器，又称为非递归型滤波器，是数字信号处理系统中最基本的元件，它可以在保证任意幅频特性的同时具有严格的线性相频特性，同时其单位抽样响应是有限长的，因而滤波器是稳定的系统。(FIR and IIR filter is implemented on the DSP. DSP is the use of a computer or a dedicated DSP processor in digital form to the signal acquisition, conversion, filtering, valuation, enhancement, compression, recognition processing needs of the people to give signal form. FIR (Finite Impulse Response) filter: finite impulse response filter units, also known as non-recursive filters, digital signal processing system is the most basic element, it can guarantee any amplitude-frequency characteristics of both a strict linear phase-frequency characteristics, while the unit sampling response is of finite length, and thus the filter is stable system.)

這是一個利用butter filter 的bandstop 來濾除原始訊號中有雜訊的方法，先轉為spectrogram觀察雜訊所分步頻帶與能量，再依照要濾除的部分作bandstopa(This is a use of bandstop butter filter to filter out the noise of the original signal has a method, the first step into a spectrogram observation noise and energy of the band, then follow to filter out parts for bandstopa)

matlab with simulink can do simulation of wimax before you can model your system then simulate to improve the performance

一个关于风力发电的仿真模型，应用的是双馈电机。(A simulation model of the wind power generation, application of the doubly-fed machine.)

利用自然梯度算法，三相光伏逆变并网的仿真，Pisarenko谐波分解算法。( Use of natural gradient algorithm, Three-phase photovoltaic inverter and network simulation, Pisarenko harmonic decomposition algorithm.)

说明：  一个很实用的MATLAB程序，望给需要的人带来方便(A very useful MATLAB program, hope to bring convenience to people in need)