Lowpassfilter

在信号处理中，信号发射时，信号通过载波，调制，以电磁波的形式发射出来 在接收端，射频信号通过天线接收，超外差式等方式进行处理，变频到中频 然后通过数字技术对中频信号进行处理，此时的中频信号采样率很高，多达几十兆赫 而要解调出来的信号很小，此时就要经过滤波来得到我们需要的信号 如果直接设计滤波器，阶数会非常庞大，软件，硬件设备都承受不了 因此，一般常用的技术是进行下变频处理，其主要技术就是通过抽取滤波进行下变频 常用的滤波器就是CIC抽取, 希望可以帮助一些坛友解决基本的问题。 (In signal processing, signal emission, signal through the carrier, in the form of electromagnetic wave modulation, launched In the receiver, rf signals through the antenna, specialized superheterodyne type means such as processing, the frequency conversion to intermediate frequency Then through digital technology of intermediate frequency signal processing, at this time of intermediate frequency signal sampling rate is very high, as many as several decades MHZ But the signal demodulation out is very small, at this time would be passing filter to get what we need signal If design directly filter, order number be colossal, software, hardware equipment all suffer Therefore, the technology is usually used for down-transducer processing, its main technical is by extracting filtering down-transducer Commonly used filter is CIC extraction, the hope can help some friends solve basic problems of the altar.)

产生火炮发射炮弹的航迹，模型的建立，并画出仿真结果。(The track artillery shells fired generation, model, and draw the simulation results.)

openpiv，piv计算的matlab开源代码。包含几个算例(Openpiv, piv calculation of matlab source code.Contains several examples)

下垂控制仿真，采用PF-QE下垂，能够按给定的有功和无功进行仿真(Droop control simulation, using the PF-QE drop, can be simulated according to the given active power and reactive power)

捷联惯导与行位推算，构成组合导航系统，INS和航位推算组合(The SINS line reckoning that constitute the integrated navigation system, INS, and the combination of dead reckoning)

电话线出现断线或短路故障时，线路的阻抗则发生很大变化，利用电桥法测试出电阻的大小，进而得出线路故障的地方(Telephone lines appear disconnection or short circuit fault, the line impedance is changed, test out the size of resistance by Wheatstone bridge method, and then draw the line fault place )

用Matlab写的关于UDP（用户数据报协议）下的主机间的数据通讯。如需运行这个程序，只需把程序中的IP替换成你的主机IP地址即可 (Matlab UDP)

结构力学有限元分析Matlab代码，非常实用(Structural mechanics, finite element analysis of Matlab code, very useful)

线性SVM分类，数据已给出，代码很详尽哈(Linear SVM classification, data has been given, the code is very detailed and Kazakhstan)

用三级小波变换实现的语音信号去噪处理的MATLAB源程序，去噪效果很好(Use level 3 wavelet transform of the realization of the speech signal to deal with the noise MATLAB source, denoising the effect is very good)