chap_3

产生中频和高频信号及其相应滤波器，并对其进行滤波和分析(Intermediate frequency and high frequency signal generated and its corresponding filter and its filtering and analysis)

本程序对一维信号能实现快速分数阶傅里叶变换，并附有注释(The program for one-dimensional signal can achieve fast fractional Fourier transform, together with comments)

利用MATLAB软件对学生的各项信息进行统计，然后按照学生的成绩进行排名。(MATLAB software statistics the information to the students, and then ranked according to the students' academic achievement.)

Line Modulation in matlab

数学规划基础课后作业，北京航空航天大学最优化，牛顿法，最速下降法，回溯线搜索(Mathematics programming foundation homework, Beihang University optimization, Newton method, steepest descent method, backtracking line search)

说明：  一种构建BA无标度复杂网络模型的matlab代码，(Construction of a BA scale-free complex network models matlab code)

说明：  QPSK（四进制相移键控）信号的产生及调制解调过程（经高斯和瑞利信道）的仿真(QPSK (quaternary phase shift keying) signal generation and modulation and demodulation process (by the Gaussian and Rayleigh channel) Simulation)

16QAM调制的Matlab程序，通过仿真(16QAM modulation of the Matlab program, the simulation)

说话人身份识别程序，采用MFCC参数提取，并建立GMM模型来进行识别(Speaker identification procedures, using MFCC extraction, and the establishment of GMM model to identify)

EBMC，基于无线传感器网络经典路由算法的改进算法。(EBMC,the improved algorithm based on the classic routing algorithm of wireless sensor networks.)