acquisition

数字信号处理文档：在matlab下，对音频信号，图像信号以及视频信号的采集和处理。(Digital signal processing document: In matlab, the audio signal, the image signal and the video signal acquisition and processing.)

无线光通信中的几种常见调试方式的误码率性能(the performance of bit error rate of some modulation schemes in wireless optical communication)

1）设计Butterworth型音频抗混叠滤波器； 2）参数： 下通带频率300Hz；上通带频率3400Hz； 下阻带频率280Hz；上阻带频率3600Hz； 通带最大衰减0.3dB； 阻带最小衰减40dB； 3）采用一低通滤波器和一高通滤波器级联； 4）分别确定LPF和HPF的性能指标； 5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线； 6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。(1) the design of Butterworth-type audio anti-aliasing filter 2) parameters: passband frequency of 300Hz on pass-band frequency 3400Hz under the stop-band frequency of 280Hz on stop-band frequency 3600Hz passband maximum attenuation of 0.3dB minimum stopband attenuation of 40dB 3) the use of a low-pass filter and a high-pass filter cascade 4) separately to determine the performance of LPF and HPF target 5) to derive two-filter system function and frequency response, and draw its increase frequency characteristic curve 6) for the entire filter system function and frequency response, and draw its amplitude-frequency characteristic curve.)

说明：  服从瑞丽分布的多普勒频移的MATLAB仿真经典(MATLAB Simulation Classic of Doppler Frequency shift following Rayleigh Distribution)

一种GPS和GSM模块的资料-A GPS and GSM modules of information(A GPS and GSM modules of information)

OFDM 同步技术研究 Schmidl_Cox算法 定时估计加频偏估计 matlab程序(The the OFDM synchronization technology research Schmidl_Cox algorithm timing and frequency offset estimation matlab program is estimated)

说明：  用matlab构建不规则三角网构建，里面有四个文件，后三个是函数(Using matlab to build Irregular Triangulation network, there are four files, and the last three are functions.)

用matlab编写的Delaunay三角化的程序，在points里面修改自己的初始点。(Delaunay triangulation using matlab program to modify the initial point, the points inside.)

说明：  电磁波在含有磁场的等离子体中的传输；磁感应强度可以变化(microwave propagation in magnetic plasma)

说明：  使用wifi信号进行人体定位追踪，里面有AOA和TOF的计算能够准确计算人体位置(Using WiFi signal to locate and track human body.The calculation with AOA and TOF can accurately calculate the position of human body)