powell

This is some code for recording in Matlab.

最小二乘拟合，最小二乘拟合直线算法，使用matlab实现最小二乘拟合直线。(Least square fitting, least squares fitting straight line method, using the least squares fitting straight line matlab implementation.)

详细讲述了如何用matlab进行程序设计，如何编写高效的程序。(Describe in detail how to use matlab program design, how to write efficient programs.)

QPSK调制后产生QPSK信号，QPSK信号分别通过AWGN信道、Rayleigh衰减信道和Rician衰减信道，分别通过QPSK解调出数字信号，通过输入与输出数字信号的对比计算出仿真过程中的传输误比率，并将其与各衰减信道的理论误比率进行对比(Generate QPSK signal QPSK modulation, QPSK signals through AWGN channel, Rayleigh fading channel and Rician fading channel, respectively, through the QPSK demodulation of digital signals by comparing input and output digital signals to calculate the simulation process of transmission error rate, and to compare with the theoretical error rate for each decay channel)

基于非线性扩展卡尔曼滤波的Matlab程序(The extended Kalman filter can not only estimate states of nonlinear dynamic systems from noisy measurements but also can be used to estimate parameters of a nonlinear system. A direct application of parameter estimation is to train artificial neural networks. This function and an embeded example shows a way how this can be done.)

EFG METHOD FOR STUDYING, AND THIS CAN SOLVE 3D PROBLEM

汽车四分之一悬架模型建模与仿真，simulink(Car Modeling and Simulation fourth suspension)

说明：  功率谱估计随机数字信号处理中的另一个实验，以太阳黑子估计太阳活动的周期(Power spectrum estimation random digital signal processing in another experiment, in order to estimate the solar sunspot activity cycle)

说明：  已经编好的关于函数逼近的常用MATLAB 算法(Approximation)

PULSE CODE MODULATION MATLAB