modem

matlab/simulink环境下双极性spwm产生 电流pid闭环控制(matlab/simulink environment bipolar spwm current pid loop control)

稳压稳频电源的电路原理介绍及其基于matlab的软件仿真。还有根据稳压稳频电源的幅频和相频特性曲线的仿真。(Stabilized frequency power supply circuit schematic matlab software-based simulation. There stabilized frequency power of the amplitude and phase frequency characteristic curve simulation.)

LDPC校验矩阵生成、高斯消去法编码、BP译码程序，可以作为自己编写LDPC编译码程序的参考。因为matlab代码效率不高，所以这个程序仿真起来比较慢.(LDPC check matrix generation, Gaussian elimination coding, BP decoding procedure can be used as its own procedures for the preparation of LDPC codec reference. Because matlab code efficiency is not high, so this process is relatively slow simulation together.)

使用matlab实现设计IIR滤波器：冲激不变法、双线性变换法 设计一个巴特沃思低通滤波器，其技术指标为：3dB带宽为，阻带截止频率为，阻带衰减大于30dB，采样间隔T=10us。 1）用冲激响应不变法 2）用双线性变换法设计 3）用FIR的矩形窗函数设计 二、用双线性变换法分别设计低通、高通、带通、带阻四种滤波器。模拟滤波器带原型分别为切比雪夫滤波器和椭圆滤波器，采样率Fs=20kHz，指标如下： 1）低通：通带0～4 kHz，阻带5 kHz，通带衰减Rp=0.5dB，阻带衰减As=10dB。 2）高通：阻带0～4 kHz，通带5 kHz，通带衰减Rp=0.5dB，阻带衰减As=10dB。 3）带通：通带2kHz～4 kHz，阻带0～1.5 kHz，4.5kHz以上，通带衰减Rp=0.5dB，阻带衰减As=10dB。 4）带阻：阻带2kHz～4 kHz，通带0～1.5 kHz，4.5kHz以上，通带衰减Rp=0.5dB，阻带衰减As=10dB。(Using MATLAB to implement the design of IIR filters: impulse invariant and bilinear transformation)

变步长的LMS滤波器设计，一种新的变步长LMS自适应滤波算法(Design of variable step size LMS filter, a new variable step size LMS adaptive filtering algorithm )

Gim轮胎模型，可以运行，运行效果很好，有需要的同志自己下载(Gim tire model, can run, the operation is very good, there is a need for comrades to download their own)

说明：  智能汽车和智能交通的关键技术，V2X（车联网）无线资源分配(The key technology of intelligent vehicle and intelligent transportation, v2x (Internet of vehicles) wireless resource allocation)

说明：  基于matlab5g工具包，进行一定修改，使得信道估计和均衡效果更好(Based MatLab 5G Toolbox, make greater result)

说明：  编写的一个matlab实现用GUI界面识别手写英文字母的代码(A matlab code written to recognize handwritten English letters with GUI interface)

function ber_ml=Alamoudi(snr,soglia) This function simulates a Alamouti scheme. The input variables are soglia and snr. Soglia: is the number of errors after which the iterations stop. For better results, put high value of soglia, but the simulation is longer. snr: the signal to noise ratio (if u don t know what is a signal to noise ratio, well, come back to your high school!). Note: U should use this function with a main function in wich u chose different value of snr. That s because this function work just with one value of snr. If u have problem with this code, write me at m.allegritti@email.it. Take care! Max