rick_generator

带有偏振模色散的光纤系统中基于lms算法的前馈均衡补偿系统(Optical fiber with polarization mode dispersion system lms algorithm based on feed-forward compensation system balance)

基于MATLAB的升降压斩波电路的仿真，可以调节负载和占空比来观察波形的变化(Based on MATLAB buck chopper circuit simulation, you can adjust the load and duty to observe the waveform changes)

改进自相关法提取基音周期，去除声道的影响。(Improved auto-correlation method to extract the pitch period to remove the influence of channel.)

this code is for simulation solution

turbo编译码TD标准交织采用的是TD标准，码率为1/3(turbo code decode)

说明：  方向导数和梯度的概念和基本公式，里面有具体的讲解(Directional derivative and gradient of the concepts and formulas, which have specific explanations)

Several modal identification techniques have been developed in the past few decades, and their use is rapidly expanding due to new focus on the instrumentation of major structures. This paper focuses on the expansion of the eigenvalue realization algorithm (ERA)–observer Kalman filter identification

explain Fish School Search

用于实现二进制时频调制与解调，并实现了误码率的计算(Used to achieve binary time-frequency modulation and demodulation, and to achieve the bit error rate calculation)

随机产生信息码求误码率 信息码长度（帧长64bit） 息码速率为10KHz（100us） 发送带宽20KHz（信息码速率的2倍） 发送信号功率2W 载波频率70MHz 采样频率280MHz（发送数据产生采样率） 20KHz方波 0KHz方波 0KHz方波高低电平采样点数 信息码采样点数 ASK调制的调制度ma=1-2/(2+alpha) 根据2ASK调制度确定alpha值(Random generation of information code for error rate 信息码长度（帧长64bit） Message length (64bit) 息码速率为10KHz（100us） The rate of interest rate is 10KHz (100US) 发送带宽20KHz（信息码速率的2倍） Transmission bandwidth 20KHz (2 times the rate of the information code) 发送信号功率2W Transmit signal power 2W 载波频率70MHz Carrier frequency 70MHz 采样频率280MHz（发送数据产生采样率） Sampling frequency 280MHz (transmit data generated sampling rate) 20KHz方波 20KHz Fang Bo 0KHz方波 0KHz Fang Bo 0KHz方波高低电平采样点数 0KHz square wave height sampling points 信息码采样点数 Information code sampling point ASK调制的调制度ma=1-2/(2+alpha) ASK modulation of the modulation system ma=1-2/ (2+alpha) 根据2ASK调制度确定alpha值 Determine the alpha value according to the 2ASK modulation system )