最佳基带系统的Pe

移动电话主要采用频率复用，但分配给移动电话的频段很少，远不能满足用户的需要。 因此就提出将地区划分成小区，称为蜂窝（Cell），每个蜂窝内使用一组频率，相隔一段距离后，相同的频率又可重复使用。 -The main use of mobile phone frequency reuse, but allocated to the small-band mobile phone, far from being able to meet the needs of users. Therefore proposed to be divided into residential areas, known as cellular (Cell), each use a set of cellular frequencies, separated by some distance, the same frequency can be reused.

Sigma调制功能，便可提高其频率精度，大幅降低相位噪音及带内杂散信号，并???持极高的切换速度。系统设计工程师可以利用 Delta Sigma PLL将比较频率提高到很高的水平，以大大降低相位噪音。但高比较频率会导致产生周期滑动(cycle slipping)现象。-Sigma modulation function, can increase its frequency accuracy, dramatically reducing the in-band phase noise and spurious signals, and??? Holders of high switching speed. System design engineers can take advantage of Delta Sigma PLL compares the frequency increased to a very high level in order to significantly reduce the phase noise. However, the high comparison frequency would result in sliding cycle (cycle slipping) phenomenon.

模拟短消息网关,附带发射短消息类 方便发射SMS-simulation Short Message Gateway, fringe launching short news category convenient launch SMS

MFC界面的 API 串口通信 代码非常简单 一看就懂 采用一个线程接收数据，满足简单的开发需要 开发工具VS2005 

LNB coding of sppaning tr-LNB coding of sppaning tree

ymodem协议源码实现 -The source of ymoderm protocol

点到点无线通信实验，属于无线传感器网络中基础通信类相关代码。-Point-to-point wireless communications experiment, wireless sensor networks belong to basic communications in the relevant category code.

vs2005开发环境下面用C#编写的虚拟RFID串口模拟器。当接从串口收到一个数据的时候，工具自动回复一个你定制的报文串。前提是需要有虚拟串口。也可以手动向串口发送报文的功能。-vs2005 development environment written in C# using the following virtual RFID serial simulator. Upon receiving a data received from the serial port when the tool automatically go back to a string of your custom message. The premise that the need for a virtual serial port. You can also manually send a message to the serial port function.

该tcl文件详细介绍了如何在ns2下使用xgrapg工具来分析trace文件-this tcl file

这是一个usb2.0和usb1.1的协议,调试OK,运行很稳定-This is a USB2.0 and USB1.1 agreement, debugging OK, run very stable