char-recognition

第15章 常微分方程的初值问题.zip。是从书中光盘里直接拷贝的代码，放在这里，与大家共享，共同交流，希望对大家有帮助。(Chapter 15 of the ordinary differential equation initial value problem)

说明：  通信信号相干调制解调源码 Fc=10 ％载频 Fs=40 ％系统采样频率 Fd=1 ％码速率 N=Fs/Fd df=10 numSymb=25 ％进行仿真的信息代码个数 M=2 ％进制数(Coherent modulation and demodulation of communication signal source Fc = 10 carrier frequency Fs = 40 systematic sampling frequency Fd = 1 code rate N = Fs/Fd df = 10 numSymb = 25 of the information code to simulate the number of M = 2 hexadecimal number)

七自由度整车模型，四个车轮的转动，纵向侧向运动，以及横摆运动，包括dugoff轮胎模型以及其中的参数(Seven degrees of freedom vehicle model, four wheel rotation, vertical lateral movement and yaw movement, including dugoff tire model and parameters which)

LGB码本选择，矢量编码之前的码本选择算法。随机初始码本(Code of the LGB choice, before the vector encoding the code book selection algorithm. Random initial codebook)

it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed

有限元前处理的一个小程序，包括网格的划分等，比较有用(A finite element pre-processing program, including the division of the grid, the more useful)

本段程序主要写了认知无线电非视距误差下的仿真结果(The program is mainly written in paragraph cognitive radio simulation results under NLOS error)

说明：  svm预测教程，适合新手学习，2020版本(The SVM prediction tutorial, suitable for beginners learning, 2020 edition)

parzen algorithm, gaussian and hypercube, there are 4 files, I hope they are useful for you

kalman滤波，系统方程主要采用动态模型的例程(Kalman filtering, the system mainly uses dynamic equations of the model routines)