power_smstarting

现代通信系统与matlab（程序）proakis版(Modern communication systems and matlab (process) proakis version)

数字图像处理MATLAB版(冈萨雷斯).pdf(Digital Image Processing MATLAB version (Gonzalez). Pdf)

a presentation on understanding the matlab and simulink may be of someones help

灰色pid,离散灰色系统,连续灰色系统,pid控制,灰色预测(gray pid, discrete gray, gray row, pid control, Gray forecast)

fastica对3幅混合图像继续分离，对分离结果进行计算pi值，psnr值的计算程序。有一定参考价值。(fastica continue for three mixed image separation, separation results calculated the value of pi to calculate the value of the program psnr. There is a certain reference value.)

低通滤波器，对数据进行平滑，也叫做最小二乘法，Savitzky-Golay算法(a particular type of low-pass filter, well-adapted for data smoothing, and termed variously Savitzky-Golay, least-squares, or DISPO (Digital Smoothing Polynomial) filters. Rather than having their properties defined in the Fourier domain and then translated to the time domain, Savitzky-Golay filters derive directly from a particular formulation of the data smoothing problem in the time domain)

说明：  用matlab实现了通信中经常用的卷积编码，并对其性能进行了分析(Matlab implementation of the communication with the regular use of convolutional coding and its performance is analyzed)

说明：  modem.qammod对象实现M-QAM调制器，本示例中M为16。其输入参数是从0到15的整数而不是4bits二进制数据。因此，在利用此对象的modulate方法之前需要对二进制数据序列x进行预处理。特别地, 先采用MATLAB中的reshape函数将x沿着矩阵的行方向重新整理成每行4bit数据，然后应用bi2de函数将4bit数据转换成相应的整数。(modem.qammod object implements M-QAM modulator M in this example is 16. Input parameter is an integer from 0 to 15 instead of 4bits binary data. Therefore, before using the method of this object needs to modulate the binary data sequence x pretreatment. In particular, the first use of MATLAB reshape function x 4bit rearranged into each row of data in the row direction of the matrix, and then apply bi2de 4bit function to convert the data into the corresponding integer.)

分析了正弦信号分辨率问题，当采样频率相同时，点数越多，分辨率越高，频谱特性误差越小( Analysis the problem of resolution in a sinusoidal signal.When the sampling frequency is the same, the more points,the higher the resolution,and the error spectral characteristic is smaller.)

说明：  信号经过滤波器，会发生相移，本程序设计了零相位滤波器，矫正相位(The signal passes through the filter, will occur the phase shift, this procedure designs the zero phase filter, corrects the phase)