SOA_Jiang

用遗传算法优化BP神经网络的Matlab编程实例(Using genetic algorithm BP neural network programming examples Matlab)

胡广书现代信号处理MATLAB程序，值得学习(Hu Guangshu MATLAB modern signal processing procedures, it is worth learning)

是关于matlab通讯的一篇论文，有需要的可以看看，感觉挺好挺实用(Is a thesis on matlab communication need to look at, I feel very good to very practical)

由设计要求可知，wp<=0.2π，允许误差幅度小于1dB，ws>=0.3π内衰减应大于15dB。为了验证数字滤波器的实际滤波功能，设计程序时，把输入序列定为验证函数x（t）=4sin（100πt）以及x（t）=4sin（200πt）和x（t）=4sin（400πt）。又因为Ts=1.25ms，T=80ms，故采样点为64，即N=64，所以当M=6，可以同时调试并验证程序的滤波功能。(Seen by the design requirements, wp < = 0.2π, allow a margin of error of less than 1dB, ws> = 0.3π within attenuation greater than 15dB. In order to verify the actual filtering function of the digital filter design program, the input sequence as validation function x (t) = 4sin (100πt) and x (t) = 4sin (200πt) and x (t) = 4sin (400πt) . And because Ts = 1.25ms, T = 80ms, so the sampling points is 64, that is N = 64, so when M = 6, can debug and validate filtering program.)

双线性变换法设计Butterworth滤波器。分别画出滤波前和滤波后的时域图和频谱图。(Bilinear transform design Butterworth filter. Draw the pre-filter and the filtered time-domain and frequency spectrum.)

说明：  根据语音信号的特点给出有关滤波器的性能指标：1）低通滤波器性能指标，fp=1000Hz，fc=1200 Hz， As=100dB，Ap=1dB；2）高通滤波器性能指标，fc=2800 Hz，fp=3000 Hz As=100dB，Ap=1dB；3）带通滤波器性能指标，fp1=1200 Hz，fp2=3000 Hz，fc1=1000 Hz，fc2=3200 Hz，As=100dB，Ap=1dB。用IIR对其分析，最后，利用MATLAB中的函数freqz画出各滤波器的频率响应。(This article according to the IIR filter and the FIR filter characteristic, uses the bilinearity method of transformation under the MATLAB bad boundary to design IIR and to design the FIR numeral filter separately with the window box number, and carries on the analysis to the gathering pronunciation signal, and finally gives IIR and FIR to the pronunciation filter effect.)

基于simulink仿真，应用tdm、pcm、2dpsk技术实现两路语音同时传输(Simulink simulation-based, application tdm, pcm, 2dpsk technology to achieve two-way simultaneous transmission of voice)

matlab发动机仿真模型，根据微分方程建立。包括传热模型，燃烧模型。(the matlab engine simulation model)

电力系统继电保护中方向阻抗型继电器仿真，在分布参数下构造“0接线”阻抗继电器模块，可对三相短路、两相短路和单相短路的出口故障、末端故障和外部故障进行仿真，得到各相继电器的相位，是研究阻抗保护的有效工具。(Power system protection in the direction of the impedance relay simulation, the distribution parameters structure " 0 Connection" impedance relay module, the simulation of three-phase short circuit, two-phase short-circuit and export single-phase short circuit fault, the end of the fault and external fault, the phase of each phase relay is an effective tool to study the impedance protection.)

电力系统调度程序，考虑安全约束的经济调度(Power system scheduler )