Fundamentals_of_Electromagnetics_with_Matlab_-_Lo

实现对自己录制语音信号的加噪，并设计滤波器对其滤波。(To achieve their own recorded voice signal plus noise, and to design filters for its filter.)

说明：  GSM信号的调制原理和生成的matlab仿真程序(GSM modulation signal generated by theory and simulation program matlab)

An electric wheelchair uses a motor with a torque constant of 1.1 Nm/A, powered from a 24 V battery, with an internal resistance of 0.25Ω. We are interested in designing a controller with 44 Nm continuous torque capability, both in driving and braking modes at all speeds, with the widest possible operating speed range, both forward and reverse direction using the given battery.

反幂法计算最小特征值及其特征向量，matlab调用函数(Inverse power method to calculate the smallest eigenvalue and its eigenvectors matlab function is called)

按照文献《complex networks》中192-193页方法生成的scale free network，有详细注释。此方法有助于理解scale free network的生成原理，并画出了P（k）图，可以自己验证r值是否正确。(According to literature " complex networks" in the 192-193 page method to generate the scale free network, with detailed notes. This approach helps to understand the generation of scale free network theory, and plotted the P (k) diagram, you can verify their r value is correct.)

MATLAB相关程序，turboGAMPdecoding_v2，turboGAMP解码相关算法，具体全面(MATLAB procedures, turboGAMPdecoding_v2, turboGAMP decoding related algorithms, specifically comprehensive)

给出信道离散表示，可得到信道幅频响应及相频响应。(Given the discrete expression of communicaton channel, it may show the amplitude frequence response and the phase frequence reponse.)

设计一维纳滤波器 (1)产生三组观测数据：首先根据s(n)=a s(n-1)+w(n)产生信号s(n)，将其加噪（信噪比分别为20dB,10 dB，6 dB），得到观测数据x1(n), x2(n), x31(n). (2)估计xi(n)，i=1,2,3的AR模型参数。假设信号长度为L，AR模型阶数为N，分析实验结果，并讨论改变L,N对实验结果的影响。 (A Wiener filter design (1) to produce three sets of observations: first generating a signal s (n) according to s (n) = as (n-1)+w (n), to add noise (20dB SNR, respectively , 10 dB, 6 dB), to obtain observational data x1 (n), x2 (n), x31 (n). (2) estimate xi (n), i = AR model parameters 1,2,3. Assuming the signal length L, AR model of order N, analysis of experimental results and discuss the impact changing L, N of the experimental results.)

单摆模型及其扩展。给出单摆的运动参量随时间变化的情况。又扩展到双摆.(Pendulum model and its extensions.Given the situation of the pendulum movement parameters change over time. Extended to the double pendulum)

matlab program for the simple example. which will help u to understand how to use mtlab.