paper

说明：  基于能量检测和周期循环检测的认知无线电频谱检测matlab代码 用周期循环检测算法检测： 首先运行a.m程序，通过此程序运算得出循环频率a值； 再运行zhouqi.m程序，对a值进行确定，通过周期循环算法对信号进行检测； 用能量检测算法检测： 运行nengliang.m检测程序，使用能量检测对信号进行检测。 检测完毕，对检测性能进行分析。 (Cognitive radio based on energy detection spectrum detection matlab code)

matlab仿真双级矩阵变换器的逆变程序，包括判断扇区，计算相位角等(matlab simulation of two-stage matrix converter inverter procedures, including the judge sectors, calculating the phase angle)

Descent gradient method implement in matlab

PBMGSO algorithm based on MATLAB source code

傅里叶变换过程中由于时域信号长度有限，变换后有可能漏掉大的频谱分量(Fourier transform process, due to the finite length of the time domain signal, after conversion may miss a large spectral components)

光纤相干通讯数字相干接收机，算法和子系统。一篇很精简全面的总结。(Digital coherent optical receiver algorithms and subsystems in fiber coherent optical communication. A very good brief summary.)

周期图法（自相关法）的功率谱估计。希望对大家有所帮助。(Periodogram method (autocorrelation method) of power spectrum estimation. We want to help.)

四阵元理想情况下情况下，来波方向为30度，干扰信号方向为45度时，各阵元波形( Smart Antenna beam-forming)

生成正弦信号加噪声，进行频谱分析，适合初学者进行学习(Generate sinusoidal signal plus noise, spectrum analysis, suitable for beginners to learn)

说明：  基于小世界模型的发散结构的改进PSO算法，当时我的论文，希望对各位朋友有些启发(Divergence based on small-world model to improve the structure of PSO algorithm, then my paper, I hope some of you friends, inspired)