LFM_freq_domain

This file is used to calculate the view factors

雨流计数法，采用时间轴转成竖直向下，然后依据下雨流水的模式计算各极值，形成局部循环(Rain-flow counting method, using the timeline into a vertically downward, and then based on the pattern of rain water each extremal form a partial circle)

通过MATLAB编程研究工作和仿真结果分析，对改进的免疫遗传算法进行综合性地概括、归纳和总结。在处理复杂优化调度问题方面提出了一些改进的思想，并进行了算法实现和仿真。对有待进一步深入研究的问题进行了设想，对免疫遗传算法解决相关优化调度问题进行了展望。(Research of ImProved Immune Genetic Algorithms and its Applications in Optimization Scheduling Problem )

产生一个随机信号和两个不同频率但频率间隔很小的正弦信号，要求对两信号之和进行如下分析： （1） 求该随机信号的自相关性系数、自相关函数，画出对应的图形； （2） 利用不同的参数建模方法求出两个随机信号的功率谱； （3） 利用极大似然估计、递推最小二乘法等常用的参数估计方法估计所建模型，包括AR模型、MA模型和ARMA模型的的参数，阶次自定；并与Matlab工具箱里的一些建模函数的运算结果进行比较； （4） 利用陷波滤波和MUSIC滤波方法对该信号的频谱进行估计； （5） 利用Wiener滤波、LMS滤波对该含噪声的正弦信号进行去噪声处理； （6） 假设该信号是一个飞行器的某个方向的线位移信号，可否利用Kalman滤波对该信号进行滤波？ （7） 利用高阶谱理论对该信号进行谱估计和相应的AR模型、MA模型和ARMA模型估计； （8） 利用小波变换（变换函数可以直接用Matlab里的函数）对该信号进行去噪声处理，并和前面的去噪声方法进行比较。 (Produce a random signal and two different frequency but frequency interval small sine signals, required to make the following analysis of two signals: (1) for the random signal from the correlation coefficients, the autocorrelation function and draw the corresponding graphics (2) make use of different parameters modeling method for out two random signal power spectrum (3) using maximum likelihood estimation, recursive least square method and common parameters estimation method estimates that the model, including AR model, MA model and the parameters of the ARMA model we, order time decided oneself With Matlab toolbox and some of the modeling function is used compared the (4) use trapped wave filter and MUSIC of the signal filter method of spectrum to estimate (5) use Wiener filtering, LMS filtering on the sinusoidal signal with noise to noise treatment (6) assumes the signal is a vehicle of a certain direction of displacement signal line, can you use Kalman filtering on the)

MATLAB是一套功能十分强大的工程计算及数据分析软件,具有友好的可视化编程界面及接近数学表达式的自然化语言。针对信号与系统中傅里叶变换具有抽象度高、难于理解的特点，利用MATLAB强大的信号处理功能、阶跃响应，微分方程，卷积定理的内容，通过MATLAB 程序实现。本文介绍了MATLAB在信号与系统仿真中的应用,该软件在通信电子类课程中应用越来越广泛,通过几个典型实例来重点研究。 关键词：MATLAB；阶跃响应；微分方程；卷积；信号与系统；仿真 (MATLAB is a very powerful engineering calculations and data analysis software, with a friendly interface and visual programming language close to naturalizing mathematical expressions. For the Fourier transform of signals and systems with a high degree of abstraction, it is difficult to understand the characteristics, the use of the powerful MATLAB signal processing functions, step response, convolution theorem content differential equations by MATLAB program. This article describes the application of MATLAB in signal and system simulation, the software in the electronic communications courses in applied more widely, by focusing on a few typical examples. Keywords: MATLAB step response signals and systems convolution differential equation simulation )

Write frame sequence to hard disk as a RAW image file

说明：  一个大家都在寻找的em算法，matlab实现(one we are looking for the em algorithm, achieving Matlab)

通过小波包分析带有随机噪声的信号，分析其障碍信号的功率谱(Use wavelet packet analysize signal with random noise, analyzes the obstacle signal power spectrum)

对合成孔径雷达距离徙动校正处理，思路清晰条理性强。(For synthetic aperture radar distance to compression processing, as distance to matched filter, clear thinking well organized. )

matlab环境下遗传算法（GA）同时优化随机共振（SR）参数a、b源程序(The source code of optimization of stochastic resonance parameters using genetic algorithm under the environment of MATLAB )