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modulation recognition documentation

说明：  matlab code for speech denoising

原始周期图法求功率谱估计的matlab程序(The original periodogram seek power spectrum estimation matlab program )

近似熵是一种衡量衡量非线性时间序列复杂性的非线性动力学分析方法，其物理意义 为熵值越大，时间序列的自我相似性越低，序 列越复杂，反之序列自我相似性越高；并且样 本熵对于序列长度依赖弱，仅需较短的数据就 能够得到稳健的熵值，同时其计算不需对数据 粗粒化，具有较好的抗干扰能力 (Approximate entropy is a measure to measure the complex nonlinear dynamics of nonlinear time series analysis method, the physical meaning of entropy value is larger, the lower the self-similarity of the time series, the more complex the sequence, whereas sequence of self-similarity the higher and the sample entropy weak dependence for the length of the sequence, only shorter data can be healthy entropy value, calculated without data coarse-grained, with good anti-jamming capability)

这个文件实现了Matlab/Simulink中的三维查找表，对要用到查表的人有帮助，里面用到Reshape函数(This file implements the Matlab/Simulink in a three-dimensional look-up table for use to help people look-up table, which used Reshape function)

本书讨论了时间域、频率域、数字域、调制域电子测量的主要方法，介绍了应用MATLAB仿真的方法实现电子测量中的信号源(含VCO和PLL)、示波器、频谱仪、瀑布图仪、相位仪、眼图仪、逻辑分析仪、时域反射仪、取样示波器、矢量示波器、矢量网络分析仪等测量仪器，并简要介绍了各仪器的工作原理、参数设置要点和注意事项。书中还给出了大量的仿真实例，对一些典型例子进行了分析和讨论。(This book discussion has time domain, and frequency domain, and digital domain, and modulation domain electronic measurement of main method, introduced has application MATLAB simulation of method achieved electronic measurement in the of signal source (containing VCO and PLL), and oscilloscope, and spectrum instrument, and falls figure instrument, and phase instrument, and eye figure instrument, and logic analysis instrument, and Shi domain reflection instrument, and sampling oscilloscope, and vector oscilloscope, and vector Network Analyzer, measurement instrument, and briefly introduced has the instrument of work principle, and parameter set points and note matters. A lot of simulation results are also given in the book, conducted an )

qpsk modulation in matlab

现代通信系统使用MATLAB第二版（中英文pdf及所有程序m文件）(Contemporary Communication Systems Using Matlab By:JohnG.Proakis )

用向前差分 中心差分计算矩阵的曲率，可对图像操作，挺好用的(Matrix of curvature of the forward differential center differential, image manipulation, very good use)

matlab code for finite element method