OPNET仿真实例，有助于初学者的快速学习。

收发短信VC++代码,最近用了,感觉还可以,推荐给大家,-VC++ code for sending and receiving text messages, most recently used, feeling also and recommend it to everyone

Generates Alist format files for SFT LDPC codes

这是本人学习CVI时下载的一个小程序，本程序根据原CVI串口例程改写，可以改变端口号、波特率等参数。并加入了显示串口状态的LED。

SEL通信协议是SEL保护装置的一个通信协议集合SEL通信协议是一个协议集，它包含了SEL ASCII命令、SEL压缩ASCII命令、隔行扫描ASCII * 和二进制报文、SEL快速计量，快速操作，快速SER报文、SEL分布式端口切换协议(LMD)1. SEL ASCII命令主要用于人工发布命令和自动化通信 * 2. SEL分布式端口切换协议(LMD): 它用于实现端口切换 * 3. SEL快速计量协议(SEL Fast Meter Protocol)主要用于传输计量和控制报文(二机制格式) * 4. 快速SER报文主要用于传输详细的事件记录，包括日期，时间，电流，电压，频率，故障信息等。 *  *        实际上，并不是所有的SEL保护都支持以上所有规约，例如SEL-451本身并不支持LMD规约， *        它需要通过外接SEL-2885规约转换器转换为LMD规约。 *

qpsk调制在瑞利信道中的性能仿真，以及各个阶段信号的星座图仿真-qpsk modulation performance in Rayleigh channel simulation, as well as the various stages of signal constellation simulation

4dpsk和8dpsk的matlab仿真实现，采用蒙特卡罗仿真法，绘制误码率曲线-the realization of 4dpsk&8dpsk by matlab tool.it use the Monte Carlo methods to draw the graph.

Visual C++ 串口通信编程实践 第9章和第10章源码 -Visual C++ Serial communication programming practice, Chapter 9 and Chapter 10 source code

discusses the Radar Cross Section (RCS). RCS dependency on aspect angle, frequency, and polarization are discussed.-discusses the Radar Cross Section (RCS). R CS dependency on aspect angle, frequency, and polarization are discussed.

1)生成2KHz和8KHz的混合信号，使该信号通过上述滤波器，观察滤波前后的波形变化和频谱分布情况。 2) 在改信号中加入高斯白噪声，观察滤波前后的波形变化和频谱分布情况3) 将上述滤波器改为中心频率为100KHz的带通滤波器，信号源为带外的90KHz和带内的100KHz的混合正弦信号，。 4) 用M文件实现上述低通滤波器。 -1) 2KHz and 8KHz to generate the mixed-signal, so that the signal through the above-mentioned filter, filter before and after observation of the waveform and spectrum distribution of the changes. 2) add to the signal in white Gaussian noise was observed before and after filtering and spectral waveform changes in the distribution of 3) will be replaced by the above-mentioned filter center frequency of 100KHz band pass filter, the signal source for the band and the band of 90KHz 100KHz Sine of the mixed signals. 4) achieve the above-mentioned documents with M low-pass filter.