p3x

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.)

基于QR分解的MIMO系统的误码率性能仿真(QR decomposition based on the BER performance of MIMO system simulation)

粒子群算法优化多峰函数，对初学者而言是很有帮助的一个东东，希望大家能够喜欢(Particle swarm optimization multimodal function, it is helpful for a beginner stuff, hope you will enjoy)

基本复合型寻优程序，用于目标函数值最优情况的寻找(The basic compound optimization procedure to find the optimal conditions for the objective function value of)

nmls to solve stochastic problems

数字图像处理用非局部均值方法，其中仔细介绍了非局部均值的原理，用法(A Non Local Algorithm for Image Denoising)

SVM支持向量机算法做语音识别的详细仿真实现代码,需要自己准备语音库，依次训练出模板，包含附加调用的函数库在内，欢迎和做语音识别，说话人识别的朋友交流(SVM support vector machine algorithm to do the detailed simulation of voice recognition to achieve the code, you need to prepare their own voice library, followed by training out of the template, including additional call function library, welcome and do voice recognition, speaker recognition friends exchange)

一本介绍空间探测相控阵雷达技术的书 内容详实，供参考(a book about radar)

用matlab进行信号与系统分析 兼容模式 (Use MATLAB for signal and system analysis)

This model provides AC coltage control in MATLAB.