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(1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 ((1) in certain wireless channel, the Doppler frequency shift will be caused by wireless channel output signal aliasing. Please describe the resulting aliasing of a variety of reasons (2) wireless channel Doppler spectrum there is a classical spectrum (classic spectrum), please explain such a spectral shape of the mechanism (3) Please use Simulink tools for writing code ( S-Function mode), resulting in a single Path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And please answer: prove that they used computer-generated classical spectrum is correct possible ways.)

Parallel sort of array of an array of integers,with surce code

针对一维非线性非平稳信号降噪的一种算法，EMD算法，这是其MATLAB代码。(An algorithm for one-dimensional nonlinear and non-stationary signal noise reduction, EMD algorithm, which is its MATLAB code.)

One of Biometrics fields is face recognition & face expression recognition ... 1- In face recognition .. we need to design authentication program by training a neural network ,there are two source codes..one of them is based on Discrete Wavelet Transform with Perceptron Neural Network.. and the other based on Discrete Cosine Transform with Perceptron Neural Network ... 2- In face expression recognition .. we defined the condition of the person (nature,happiness,disgust or anger) this source code is based on Principle component analysis(PCA) .. * we need to now about digital image processing ,neural network and PCA...

说明：  利用设置网卡为混沌模式，采用原始套接字的方式截获发向本机的ip包，并分析包的类型，源ip地址，目的ip地址，传输层协议等(card installed for the use of Chaos mode, using original socket intercepted a way to the machine ip packet, analysis of packet types, source ip address, purpose ip address, such as transport protocol)

本代码包括经典的MMSE方法和LCMV方法的推导，并包括两种方法的仿真,很有用！(The code includes the derivation of the classical methods and LCMV MMSE method, and includes simulation of the two methods, very useful!)

说明：  频谱分析，能够有效识别信号中的频率成分，适用于DSP课程设计(Spectrum analysis, which can effectively identify the frequency components in the signal, is suitable for DSP curriculum design)

功率谱估计中SVD-TLS算法的三种实现版本(Power spectrum estimation of the three kinds of SVD-TLS algorithm implementation version of the)

计算机演算程序，平方映射分岔的Qbasic计算程序，平方映射的李雅普诺夫的Qbasic计算程序，．埃侬吸引子的李雅普诺夫指数的Qbasic计算程序，．单摆运动的分岔的Qbasic计算程序(Computer calculus procedures, square mapping bifurcation Qbasic program, square Lyapunov mapping of Qbasic computer program. Egypt Lennon attractor Lyapunov exponent of Qbasic computer program. Bifurcation of the pendulum movement Qbasic program)

卡尔曼滤波器设计MTALAB实现代码,根据matlab中提供的kalman函数进行设计，需要设计出“动态方程”和“观测方程”(Kalman filter design to achieve MATLAB code, under which the Matlab Tracking function for the design, the need to design "dynamic equation" and "observation equation")