knn_demo

simulation with wireless aplications一书的matlab程序(simulation with wireless aplications procedures matlab book)

说明：  这是MATLAB编程第二版Stephen J. Chapman 著，英文经典教材的中文版。学习MATLAB的经典教材！绝对经典！ (This is the second edition of MATLAB programming with Stephen J. Chapman, the Chinese version of the English classic textbook. Learning MATLAB classic textbook! Absolute classic!)

说明：  massive mimo multiwave

matlab程序编译成独立exe文件 应用(matlab program compiled into an independent exe file)

双音多频 DTMF（ Dual Tone Multi-Frequency ）信号，是用两个特定的单音频率信号的组合来代表数字或功能(DTMF DTMF (Dual Tone Multi-Frequency) signals, use of two specific combinations of tone frequency signals to represent the number or function)

本设计研究了纠错码及循环冗余校验码的原理，以及利用MATLAB对其进行了编程和编译仿真，实现了CRC循环冗余校验码的编码及校验，在接收端收到通过校验的码.(This design research the error correcting code and cyclic redundancy check code principle, and the use of the MATLAB programming and compile the simulation, realized the CRC cyclic redundancy check code coding and check, at the receiving end received through the check code.)

说明：  主要对扩展卡尔曼滤波（EKF）、无迹卡尔曼滤波（UKF）及改进无迹卡尔曼滤波（MAUKF）算法进行研究，研究了三种算法的基本原理和各自的特点。其中扩展卡尔曼滤波器是将卡尔曼滤波器局部线性化，其算法简单，计算量小，适用于弱非线性、高斯环境。无迹卡尔曼滤波器是用一系列确定样本来逼近状态的后验概率密度。改进无迹卡尔曼滤波算法在UKF的基础上引入衰减因子。(The thesis focuses on the extended Kalman filter (EKF), unscented Kalman filter (UKF) and the improvement of unscented Kalman filter (MAUKF) algorithm research, researched the basic principles of three algorithms and their characteristics. Extended Kalman filter (EKF) is the local linear Kalman filter, the algorithm and computation are simple in weakly nonlinear and Gaussian environment. Unscented Kalman filter (UKF) is determined using a series of samples to approximate the state posterior probability density. Improved UKF algorithm (MAUKF) is introduced attenuation factor based on the UKF.)

说明：  二维离散小波变换和重构（对高通和低通系数分别卷积。。。）(Discrete wavelet transform and reconstruction (high-pass and low pass convolution coefficients...))

民航ACARS系统的msk调制（模拟），解调（实际数据）程序(Msk modulation aviation ACARS system (analog), demodulation (actual data) Program)

自适应波束行成——最小二乘法，根据得到的波束图判断到达波的方向(Adaptive beam-line- on the least square method, according to the obtained beam pattern to determine the direction of wave)