Rayleigh_fading

DPLL SIMULATION in MATLAB

说明：  matlab 工具箱，非常好用，对于有这方面需求的朋友，不错的选择。(matlab toolbox, very easy to use, has in this regard for the needs of friends, good choice.)

Block Matching Algorithm (continuous) Four Step Search

communication demodulation modulation qpsk matlab simulink code

CODE IN MATLAB TO PERFORM RIGID TRANSFORM IN 3D

说明：  利用wolf法求取Lyapunnov指数，并绘制图形(Method used to obtain Lyapunnov wolf index, and draw graphics)

本文建立了独立悬架汽车整车七自由度动力学模型，推导了振动微分方程，运用数值仿真的手段研究了汽车悬架阻尼系数、刚度等设计参数对汽车振动特性的影响规律。结果表明，在共振区域附近，相对较大的刚度，会导致汽车的舒适性下降，但在共振区以外的高频区，刚度对汽车振动幅值的影响并不大；后桥悬挂阻尼对汽车振动幅值的影响较前桥强烈，适当增大后桥悬挂的阻尼有利于振动幅值的降低(This paper established an independent suspension vehicle dynamic model of seven degree of freedom, the vibration differential equation is derived, using the numerical simulation method of vehicle suspension damping coefficient, influence of design parameters on vehicle vibration characteristics of stiffness. The results show that in the resonance region, a relatively large stiffness, will lead to the comfort of the car down, but in the resonance region outside the high frequency region, the effect of stiffness of the vehicle vibration amplitude is small; the effect of damping on automobile suspension vibration amplitude is strongly increasing the rear axle axle, suspension damping to reduce the vibration amplitude)

to find linear convolution of one dimensional input sequences

适应值的选取是一个重要的运算过程，我们应该选择合适的适应值函数，这样才能够很好的选择最佳的变量值(Fitness selection process is an important operation that we should select the appropriate fitness function, so that it can be a good choice of the best value of the variable )

一种利用atan2方法的四步相移法的相位提取程序(Four-step phase shift method to extract phase)