Double-loop--speed-control

The cat method of dog to noise ratio358

(1)设计一个数字低通滤波器．设计指标如下： 通带内幅度衰减人大于1dB 阻带内幅度衰减大于15dB (2)编制计算设计的数字滤波器幅度特性与相位特性程序，并进行实验验证； (3)编制实现该数字滤波器程序并且模拟实现数字滤波 ①分别让满足所设计滤波器的通带、过滤带、阻带频率特性的正弦波通过滤波器，验证滤波器性能。 ②改变正弦抽样时间，验证数字低通滤波器的模拟截止频率是抽样时间的函数。((1) Design a digital low-pass filter. Design specifications are as follows: pass-band attenuation range of people within a range greater than 1dB stopband attenuation greater than 15dB (2) the preparation of calculation and design of digital filter amplitude characteristics and phase characteristics of processes and experimental verification (3) the preparation of implementation of the digital filter program and simulate digital filtering ① were designed to meet the pass-band filter, filter belt, stop-band frequency characteristics of the sine wave through the filter, verify the filter performance. ② change the sine sampling time, verify that the number of analog low-pass filter cutoff frequency is the sampling function of time.)

DSP28335产生10KHZ方波的例程，包含完整的工程文件，打开即可使用。适用于ccs6.0以上版本(The routine of 10KHZ square wave generated by DSP28335 contains complete engineering files, which can be opened and used. Suitable for CCS version 6.0 or above)

说明：  ：载波频率偏移是OFDM系统实现的关键问题之一。分析了OFDM 系统载频偏移估计的2 种算法，即利用循环前缀和训练序列方法。它们均为最大似然估计方法。分别讨论了它们的基本 思想、实现方法和仿真结果。可以看出基于循环前缀算法复杂度较小，精度不高，而基于训练序列 的算法有较高的估计精度，但降纸了系统传输效率。(Abstract：Carrier frequency ofset is one of the key problems in OFDM system．Two foundational methods 。cycling prefix—based and training sequence—based algorithms。to estimate OFDM carriers~equency ofset are analyzed．Then it discusses their basic thoughts。implementing methods and simulation resuits． Finally。merits and demerits of every algorithm are supposed．It concludes that the cycling prefix— based algorithm has less complexity and less precision。and that the training sequence—based algorithm has better estimation performance at the cost of transmission efficiency．)

说明：  这是最新的卫星通信基础理论的Matlab仿真实现，pcma以及信号衰减和延迟的仿真。尽管不是我本人原创，但比较都经典。文件为*.m格式 (This is the latest in satellite communications theoretical basis Matlab Simulation, pcma and signal attenuation and delay in the simulation. Although it was not my original, but more are classics. M*. document format)

机场飞机快速匹配,程序利用已知飞机模板实现飞机的快速匹配定位.(Airport fast match, the procedure known aircraft aircraft quickly realize the template matching.)

这是一份低轨道卫星建模的资料，比较简洁适合学习(This is a low-orbit satellite modelling data, relatively simple and suitable for learning, recommend to see)

利用六种（SO2、NO2、CO、O3、PM10、PM2.5）污染物浓度数据计算空气质量AQI值(Calculating air quality AQI value by using six kinds of pollutants concentration data of SO2, NO2, CO, O3, PM10 and PM2.5)

动力模态分析，气动分析用的，一些方法的代码，希望大家有用(Dynamic modal analysis)

基于MATLAB20，能够解决常规的三维装箱问题(Solving the conventional three-dimensional packing problem)