文章中分析了OFDM系统的频谱利用率，研究了OFDM系统中的信道判决反馈均衡问题...

mscommdemo:串口通信的小程序，很好的的帮助例子，使用的的是mscomm控件。-mscommdemo: serial communication of small procedures, the help of very good example is the use of MSComm control.

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.

tcp/ip package check

用S7-200PLC的自由口模式和VB中的MSComm控件方便地实现了计算机与S7-200（CPU224）PLC的通讯。计算机作为主站,用户通过计算机可以方便地设置房间的控制指令并向PLC发出控制或监测命令， PLC作为从站来响应计算机发送的指令并采取相应的动作并将房间的电、水、热信息发回到计算机。用户可以通过电脑屏幕实时地监视到房间的电、水、热信息并进行相应的处理。-with S7-200PLC the Free Port Mode and the VB MSComm to realize a trap Computer and S7-200 (CPU224) PLC communications. Computer as a master station, Computer users can easily set up control rooms PLC issued directives to control or monitoring orders, PLC as from the station to respond to orders sent by the computer and take corresponding action will be room for electricity, water, Heat fat information to the computer. The user can screen real-time surveillance of the room electricity, water and heat information and handled accordingly.

sim600 AT命令集包括V.25TER、GSM07.07、GSM07.05等.-sim600 AT command set, including V.25TER, GSM07.07, GSM07.05 such.

provide an overview of the radar probability of detection calculations and related topics.-provide an overview of the radar probabili ty of detection calculations and related topic s.

RFID卡和读卡器之间的通信层，用文件实现的C代码

使用Fax Modem发送传真的程序 -Using FAX Modem to send fax

An IEEE 802.15.4 protocol implementation (in nesC/TinyOS):Reference Guide v1.2  芯片是CC2530

zmodem文件传输协议的源码-source code of zmodem file translation protocol