chirp

说明：  混沌系统的仿真软件，通过分析系统的参数和初始状态来观测混沌系统的运行轨迹。(Chaotic system simulation software, through the analysis of the parameters and the initial state of system to measure the trajectories of chaotic systems. )

实现了自适应信号处理LMS算法，分别绘出当w(0)=[0,0]T, =0.1及w(0)=[4, 10]T, =0.05时，LMS算法在两种下的权值变化轨迹、误差e(n)与迭代次数n的关系曲线(The LMS adaptive signal processing algorithm)

桥式起重机模型分析，非线性模型的仿真原理图(Bridge crane model analysis, nonlinear models schematic simulation)

这个程序是MATLAB的程序，它能够实现中心频率是4000Hz的带通滤波器的功能，在4000Hz的信号上面加了噪声信号，通过滤波器滤除杂波(This program is MATLAB program that enables the center frequency is 4000Hz band-pass filter function in the 4000Hz signal above the noise signal added, filtered through the clutter filter)

bark to freq transformation

仿照着《小波去噪中软硬阈值的一种改良折衷法》一文写的程序，对比了软、硬以及软硬阈值折衷法的信噪比及均方根误差。仿真出来之后，原信号的信噪比是负的，不知道为什么？均方根误差的值也比较大，不知何解？信噪比和均方根误差是参照《基于matlab的小波去噪仿真》：吴伟，《信息与电子工程》 一文写的(Modeled on the written procedures of the hard and soft threshold wavelet de-noising an improved compromise " , compared to the soft and hard compromise between the hard and soft threshold signal-to-noise ratio and root mean square error. Out of the simulation, the signal-to-noise ratio of the original signal is negative, do not know why? The value of the root mean square error is relatively large, do not know why? Signal-to-noise ratio and root mean square error with reference to the wavelet denoising matlab-based simulation: Wu Wei, " Information and Electronic Engineering" written)

Preconditioned Conjugate Gradient iterative Ax=b solver.Routine to solve a symmetric positive definite linearsystem Ax = b using the Preconditioned Conjugate

说明：  BPSK,Pi/4DQPSK,16QAM调制解调的实现：实现具体的调制解调功能(BPSK, Pi/4DQPSK, 16QAM modem realization: the realization of specific functions of modulation and demodulation)

给定一个数据集german.txt 通过libsvm来实现一定范围内参数C和sigma的最优值(需要先安装配置好matlab libsvm)

用曲线拟合的方式估计线性调频信号的初始频率及其调频斜率。得到的效果比较好。(Curve fitting way to estimate the initial frequency and chirp rate of the linear FM signal. Get better.)