ADPCM

该程序用来模拟信道，其中信道的功能包括加性高斯白噪声和多径信道(The program used to simulate the channel, which channels include additive white Gaussian noise and multipath channel)

the day of year是指这一年已经逝去的天数（包括当天） 。在平年中，它的取值范围为 1 到 365，在闰年中，它的取值范围 1到 366。编写一个 MATLAB 程序，输入年，月，日， 输入为对应的 the of year。 (the day of year is the year the number of days have been lost (including the day). In the average year, it ranges from 1 to 365, in a leap year, it ranges from 1 to 366. Write a MATLAB program, enter the year, month, day, enter the corresponding the of year.)

说明：  用MATLAB深度学习进行雷达辐射源信号分选识别(Radar emitter signal sorting and recognition with MATLAB deep learning)

说明：  MUSIC算法 DOA（Direction Of Arrival）波达方向定位技术主要有ARMA谱分析、最大似然法、熵谱分析法和特征分解法，特征分解法主要有MUSIC算法、ESPRIT算法WSF算法等。 MUSIC (Multiple Signal Classification)算法，即多信号分类算法，由Schmidt等人于1979年提出。MUSIC算法是一种基于子空间分解的算法，它利用信号子空间和噪声子空间的正交性，构建空间谱函数，通过谱峰搜索，估计信号的参数。对于声源定位来说，需要估计信号的DOA。MUSIC算法对DOA的估计有很高的分辨率，且对麦克风阵列的形状没有特殊要求，因此应用十分广泛。(DOA (direction of arrival) positioning technology mainly includes spectrum analysis, maximum likelihood method, entropy spectrum analysis method and feature decomposition method. The feature decomposition method mainly includes music algorithm, ESPRIT algorithm, algorithm, etc. Music (multiple signal classification) algorithm, namely multi signal classification algorithm, was proposed by Schmidt In 1979. MUSIC algorithm is an algorithm based on subspace decomposition. It uses the orthogonality of signal subspace and noise subspace to construct spatial spectrum function, and estimates signal parameters through spectrum peak search. For sound source localization, DOA of signal needs to be estimated. MUSIC algorithm has high resolution for DOA estimation, and has no special requirements for the shape of microphone array, so it is widely used.)

信号自适应处理，使用的核函数为高斯径向核函数。(Adaptive signal processing, use the kernel function for the Gaussian radial kernel function.)

电磁场一维的fdtd，适用于初学者参考，内为txt格式，直接复制粘贴到matlab即可。(Electromagnetic field one-dimensional fdtd)

自适应滤波器原理第四版，经典中的经典，adaptive filter theory 4th(adaptive filter theory 4th)

Fisher Score,基于Fisher Score算法的程序。可用于特征选取(Fisher Score, program based on Fisher Score,can be used in feature selections)

matlab 的基本介绍，快速熟悉matlab软件(matlab basic introduction, you can be quick familiar with matlab software)

channel estimation in ofdm