Butterworth

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.)

1. 设计在数组中查找数据模板函数 函数名: SeqSearch 参数名及顺序: 数组:list, 数据:key, 个数:n 返回: 成功:数据在数中的下标,失败: -1(1 designed to find the data in the array template function function name: SeqSearch parameter names and order: Array: list, data: key, number: n Returns: Success: Data on the number of the next standard, failed:-1)

该算法用来画出智能天线均匀线阵的分辨力比较图。可以分析不同阵元数对ULA分辨力的影响。(This is a digram of resolution of DOA estimation for ULA.)

555 的用户可下啊……好东东来的啊*（

对瑞利衰落信道的仿真基于Clarke模型，产生一个瑞利随机过程(A Rayleigh fading simulator based on Clarke s Model Creates a Rayleigh random process with PSD determined by the vehicle s speed.)

hmm code algoritm viterbi SpeechRecognition

用简单通俗的语言着重讲述了Matlab的起源及窗口各模块、基础知识、Matlab 程序、Matlab 扩展和Matlab 先进概念几个方面。(With a focus on simple language about the origin of Matlab and windows for each module, basic knowledge, Matlab program, Matlab and Matlab extension areas of advanced concepts.)

线性调频脉冲雷达中脉冲压缩与相参积累程序，经过验证(Linear FM pulse radar pulse compression and coherent integration program.)

说明：  计算有限长圆柱轴承的雷诺方程的有限差分法。(A finite difference method for calculating the Reynolds equation of a finite length cylindrical bearing.)

基于压缩感知技术的双向中继信道估计.pdf(Estimated based on compressed sensing technology, two-way relay channel. Pdf)