volterra

饱和时滞系统matlab相图,给出输入变量的上下界(The matlab phase diagram of the saturated time-delay system is given, and the upper and lower bounds of the input variables are given)

这是一个matlab程序，其中包括初始化程序，QAM程序，OFDM主程序，以及发送接受，串并转换等各部分的说明，各个部分一目了然。(This is a Matlab procedures, including the initialization procedures, QAM procedures, OFDM main program, and this acceptance, and series such as the conversion of the note, the various parts transparent.)

计算信号累积量的程序。包括：主程序cumest.m。调用程序cum2est.m；cum3est.m；cum4est.m(Calculating the amount of signal accumulation process. Include: main cumest.m. Calling program cum2est.m cum3est.m cum4est.m)

现在的雷达都是在多脉冲观测的基础上进行检 测的，多个脉冲积累后可以有效地提高信噪比，从 而改善雷达的检测能力。积累处理可以在包络检波 前完成，称为检波前积累或者中频积累。信号在中 频积累时要求信号间有严格的相位关系，也就是说 信号是相参的，所以也称为相参积累。此外，积累 过程可以在包络检波后完成，称为检波后积累或者 视频积累。由于信号在包络检波后失去了相位信息 而只保留了幅度信息，所以检波后积累处理就不需 要信号间有严格的相位关系，因此这种积累又称为 非相参积累。实现非相参积累的方法有很多，例如 抽头延迟线积累（FIR 积累）器和反馈积累器。 ()

this is code for matlab tresholding with GUI

说明：  惯性导航中一些比较常用的坐标系转换的matlab代码。(Matlab code of coordinate system conversion in inertial navigation.)

微分方程的matlab解法，已经试过，很不错，放心使用(Matlab differential equation solution, has been tried, very good, ease of use)

决策树,包括决策树的节点选择、决策控制及决策树的画法(decision tree)

本去噪程序包，包含了多种小波阈值去噪算法，包含了小波变换算法的具体实现，去噪算法的具体实现，提供了一个统一的界面，便于初学者学习(this denoise package,includes servel kinds of denoise method that based on threshlod,and it has detail realization of wavelet transform,denoise method,GUI.it is convevient for beginners)

说明：  认知无线电技术的提出是为提高频谱利用率，而认知无线实现的关键技术是频谱感知，众所周知协作检测提高了衰落环境中认知用户系统检测的性能，该文章是基于协作检测提出新的检测方案，利用了双门限方法提高了系统性能，兼顾带宽有限和增强性能两个方面，是基于门限检测的协作检测性能优化的前提。对以后门限优化协作检测非常有用。(In this paper, we employ a double threshold method in energy detector to perform spectrum sensing, while a fusion center in the cognitive radio network collects the local decisions and observational values of the secondary users, and then makes the final decision to determine whether the primary user is absence or not. Simulation results will show that the spectrum sensing performance channels is improved significantly under the proposed scheme as opposed to the conventional method.)