new_hdpower

说明：  仿真了4种常见多径衰落信道，包括无人机信道(The four common multipath fading channel, including the uav channel)

全局优化工具箱，详细说明优化工具箱的使用及注意事项(Global Optimization Toolbox, Optimization Toolbox with detailed instructions and precautions)

In this letter, we employ orthogonal random beam-forming (ORBF) for the worst-case multi-user downlink scenario whereeachuseriswiretappedby one eavesdropper. Two oppor-tunistic scheduling techniques that ensure confidentiality by ex-ploiting multi-user diversity are investigated thefirst technique (optimal) requires limited feedback of the effective signal-to-in-terference ratio (SIR) from all the users

mimo-ofdm 自适应的比特:分配按照信道响应降序排列,子载波间争夺比特和功率步长为2(mimo-ofdm adaptive bit: assigned in descending order according to the channel response, the rivalry between subcarriers bit and power step 2)

visual cryptography is very important for encryption of the data like images.

介绍了如何利用 MATLAB 及其图像处理工具箱进行数字图像处理, 并通过一些例子来说明利用 MATLAB 图像处理工 具箱进行图像处理的方法。 (Introduction to digital image processing using MATLAB and its image processing toolbox, and through some examples to illustrate the use of MATLAB image processing Toolbox for image processing method.)

1、不同阶次模拟巴特沃兹滤波器的频率响应 2、根据模拟滤波器指标，设计低通巴特沃兹滤波器 要求通带截止频率 fp = 5kHz, 通带最大衰减 ɑp =2dB， 阻带截止频率 fs= 12kHz, 阻 带最小衰减ɑs =30dB,按照上述指标设计巴特沃兹低通滤波器。 3、给定模拟滤波器，按照不同采样频率设计数字 IIR，观察采样频率对设计结果的影响 已知模拟滤波器传输函数 H(s)为 2 0.5012 ( ) 0.6449 0.7079 H s s s = + + 按照不同采样频率 Fs1=1Hz, Fs2=10Hz 使用脉冲响应不变法将 H(s)转换为 H(z)数字 IIR 滤波器。观察不同采样频率设计得到的数字 IIR 的差异。 4、给定数字 IIR 指标，用脉冲响应不变法设计 IIR。 数字低通滤波器的指标为: 0.2 , 1 , 0.3 , 15 p p s s ω π α ω π α = = = = dB dB ,使用巴特沃 兹滤波器设计数字 IIR。比较采样频率 Fs=1， 2 时设计过程中的模拟滤波器，数字滤波 器的变化。 5、用双线性变换法设计 IIR，并同脉冲响应不变法比较设计的结果。数字滤波器指标要 求如下 0.2 , 1 , 0.3 , 15 p p s s ω π α ω π α = = = = dB dB(1.Grasp the impulse response method and bilinear transformation design IIR filter principle and specific design methods, familiar with double A computer program for designing lowpass, bandpass and highpass IIR digital filters by linear design; 2 . familiar with the design of analog Butterworth filter, master impulse response method and bilinear transformation method to design digital IIR Filter method)

自适应滤波器的接相关lms算法基于matlab的实现，其中各种参数可以自行修改进行对比(Access-related adaptive filter LMS algorithm is based on the realization of matlab, in which various parameters can be modified compared)

渡口模型，系统模拟仿真，排队论，任意输入船道数和模拟次数，输出平均车辆数和各车辆类型数量(Ferry model, system simulation, queuing theory, any input channel number and the number of simulations ship, the output of the average number of vehicles and the number of vehicle types)

风电场建模与仿真。包括风速、机组等模块的建模，机组是双馈风力发电机组，可运行可调试。(Modeling and simulation of wind farms. Modeling including wind speed, units and other modules, the unit is a double-fed wind turbine can run debug.)