简单的聊天程序，初学者可以看看，高手勿进！

这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。

The program can count the number of the girth 4 of LDPC codes.

多径锐利平坦衰落仿真,包括PDF,CDF,PSD的分析,且带有一个BPSK通信的实例-Sharp flat fading multipath simulation, including the PDF, CDF, PSD analysis, and with a BPSK communication examples

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.

这是一个使用UDP协议通信的例子程序，非常简单，没有做错误处理机制。由于UDP本身是无连接、不可靠的通信协议。会因为不同的网络环境，有可能会产生数据丢失、数据重复、顺序错乱等情况。 　　示例程序包含一个服务器端和一个客户端，可以多个客户端接入服务器端。-This is an agreement to use UDP communication examples procedures, is very simple, not so error-handling mechanism. Because UDP is a connectionless, unreliable communication protocol. Because of different network environment, there may be data loss, data duplication, the order of disorder and so on. Examples of the procedure includes a server-side and a client, multiple clients can access server-side.

北邮的《通信原理》课件，希望对大家有所帮助-Beijing University of Posts and Telecommunications of the

还算是非常优秀的棋牌类游戏源码，包含AI及机器人的难度调节算法，不知道对你这里有没有用-Pretty is a very good chess game source code, including the difficulty of AI and robotics adjustment algorithm, do not know if there are no use to you

小程序看下吧 急着找这程序啊 谢谢了 让我通过吧-tips

BPSK信号使用OFDM.BER码是经过计算的。然后对仿真误码率和理论误码率进行了比较。

这是一个232转485的实用电路图，大家可以 参考一下，如果有不对的地方可以提出来，我再做修改，欢迎大家前来查看，谢谢！