phd

说明：  感知无线电中空闲频谱感知的双次协作检测算法仿真(double cooperative detection in spectrum holes)

生成一个一定参数的原信号，并附加一个符合均匀分布的随机噪声，分别画出该信号经过均匀采样的频谱图以及经过非均匀采样的频谱和时域图(Generate a certain parameter of the original signal, and attach a line with uniformly distributed random noise were drawn through uniform sampling of the signal spectrum as well as through non-uniform sampling of the spectrum and time domain)

make the epipolar line using matlab code.

人工蜂群算法的matlab源代码，共有两个版本，原作者版和改进版。 (Artificial Bee Colony (ABC)algorithm matlab source code, there are two versions, the original author version and an improved version. Artificial Bee Colony (ABC) is one of the most recently defined algorithms by Dervis Karaboga in 2005, motivated by the intelligent behavior of honey bees. )

用MATLAB编写的混沌序列图像加密程序，密钥可以从0到1之间的任何一个数，加密密钥跟解密密钥一样才能正确解密。(MATLAB prepared by the chaotic sequence image encryption procedures, Key from 0-1 between any one of the few, encryption, decryption keys with the same key can decrypt correctly.)

信道编码，很适用,希望对大家的学习有帮助(viterbi_decoder3_zhushi)

分别用矩形窗、汉宁窗、海明窗、三角窗和Blackman窗设计一 的线性相位带通滤波器，观察它们的3dB和20dB带宽，并比较五种窗的特点。(Respectively rectangular window, Hanning, Hamming window, triangular window and Blackman window design a linear phase bandpass filter, observe their 3dB and 20dB bandwidth and compare the characteristics of the five windows.)

使用高阶累积量对MPSK信号进行调制识别，包括随机梯度算法，相对梯度算法，包括最小二乘法、SVM、神经网络、1_k近邻法。( Using high-order cumulants of MPSK signal modulation recognition, Including stochastic gradient algorithm, the relative gradient algorithm, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.)

说明：  网上大多数matlab代码跑出来的结果不准确，在原有基础上改了一下，但只能在证据之间不产生冲突情况下使用(Most of the MATLAB codes on the Internet run out of inaccurate results. They have been modified on the original basis, but can only be used in cases where there is no conflict between the evidences.)

小波灰度矩向量计算代码，首先进行morlet连续小波变换，然后将小波灰度矩分为16份(Wavelet gray moment vector calculation code, the first to morlet continuous wavelet transform, and then divided into 16 wavelet Gray Moment)