chap8

发生在时变系统中所展示的频谱扩展。待仿真系统是一个简单系统，其中系统的代桶输入是一个形为x(t)=cos[2π(f0+f1)t]的“音频”。(Occurred in the time-varying system in spread spectrum display. Subject to the simulation system is a simple system in which the generation of the system input is a bucket-shaped to x (t) = cos [2π (f0+f1) t] of the " audio." )

说明：  matlab code for fingerprint orintation

利用lms算法，实现回波抵消，消除回声信道返回的噪声信号。(Least means squares (LMS algorithm, realize the echo offset, eliminate the noise signal back to the echo channel.)

关于中性点接地故障分析仿真，仿真了中性点接地系统零序电流大小及规律。(On neutral ground fault analysis and simulation, simulation of neutral grounding system zero sequence current size and regularity.)

北斗二代卫星中37种伪随机码的产生程序代码，可选择几号卫星，生成4ms的伪随机码。(Beidou second generation satellite 37 kinds of pseudo-random code generation program code, you can choose a few satellites, generate 4ms pseudo-random code.)

Numerical solution of the state equations

spectral identification method

将原图像用bior四层分解，之后弱化低频分量，重构原图，以得到细节。(use wavelet function(bior) to enhance the detail of the image,then reconstuct)

This contains demo and help instructions needed to build and test cdma models in simulink

Matlab编制的用于图像处理的带通巴特沃思滤波器(Constructs a band-pass butterworth filter)