2018

ITS PROOTOCOL OLSR AND CODE IS IN NS2

模拟调制识别各特征参数随信噪比变化曲线。信号的瞬时信息包括瞬时幅度、瞬时相位、瞬时频率及其不同角度的统计特征值，其中瞬时幅度、瞬时相位、瞬时频率是一个信号最基本的特征。（AM、DSB、SSB、VSB、FM、AM-FM）(Simulated Modulation Recognition Curve of Variation of Characteristic Parameters with Signal-to-Noise Ratio)

说明：  Python实现Can接收发送 DBC分析报文 绘制曲线 支持离线回放(Python implements Can receive and send DBC analysis messages, draw curves, support offline playback)

手机通过蓝牙上网不走GPRS流量，一定是很好的源代码，欢迎下载，现在此软件只能一个手机连接一台电脑上网！理论上可以七个手机同时连接一台电脑上网！有要研究七台手机连接一台电脑上网的请发邮件至 jodyyang@163.com反应大家加入！(Don t go through bluetooth phones Internet traffic, must be very GPRS good source, welcome to download this software, now only a mobile phone connection computer online! Seven cell phones can theoretically computer Internet connection! Have to study the daytime phone connection of computer net please email to jodyyang@163.com reaction!)

ＯＦＤＭ程序　波形如下 子载波数 128 ％ 位数/ 符号 2 ％ 符号数/ 载波 100 ％ 训练符号数 0 ％ 循环前缀长度 8 (1/16)*T ％ 调制方式 4-QAM ％ 多径信道数 3 ％IFFT Size 128 ％ 信道最大时延 2(OFDM waveform procedures following subcarriers median number of 128%/2% Symbol Symbol/Carrier 100% Training a few symbols 0% cyclic prefix length 8 (1/16)* T% modulation 4-QAM% multi-path channel number 3% IFFT Size 128% maximum delay Channel 2)

说明：  prodave是西门子PLC与高级语言的程序接口,如何使用它,这里给出一个VC与西门子PLC通讯并读写DB块数据的例子(Prodave is Siemens PLC and high level language program interface, how to use it, so here is a VC and Simon PLC and literacy DB block of data example )

计算矩形栅格或三角栅格阵列天线栅瓣图，优化天线单元间距设计(caculate grating lobes of rectangular grid or triangular grid array)

si4432射频芯片的中文开发资料，寄存器配置等(the si4432 radio frequency chip Chinese development information, register allocation)

基于matlab的QPSK通讯系统误码率、误比特率和星座图的仿真(Simulation based on Matlab QPSK communication system bit error rate, BER, and constellation)

说明：  实现了一个直接扩频系统，使用BPSK作为调制解调方法。并比较白噪声AWGN及瑞利衰落(rayleigh fading)环境下，误码率的影响。(There are two files in the zip folder. bpsk_spread.m and jakesmodel.m Steps for simulation: 1] Run jakesmodel.m first 2] Then run bpsk_spread.m . 3] Note that during the first run bpsk_spread.m has no rayleigh fading.This is because the corresponding code has been commented 4] The resulting performance is stored in BER_awgn. 5] Now uncomment the Rayleigh Fading code in bpsk_spread.m file. 6] Same time comment BER_awgn (line 112) and uncomment BER_ray variable. 7] Run the simulation. To compare the perfromances of the receiver using DSSS plot the BER_awgn and BER_ray >>semilogy([1:8],BER_awgn(1:8), g* ) hold on semilogy([1:8],BER_ray(1:8), -.b* ) hold on grid on )