多载波码分多址

开源ZigBee 协议栈，提供给大家学习-revenue ZigBee protocol stack, provides us with learning

用以太网与plc 通信的一个例子 可以参考-with Ethernet and Communications plc example of a reference

用一阶锁相环实现的FM解调器.用ELANIX公司的SYSTEMVIEW运行调试.-with a band of PLL FM demodulator. ELANIX company with the SYSTEMVIEW Win OK debugging.

利用VC++，MFC开发的串口调试助手，实现文件的发送与接收，里面有一个主程序界面，各种功能都在上面，提供给需要编写串口调试助手的，代码清晰易懂，附带编写程序的重要步骤。

详细的介绍了MODBUS的协议内容 包括传输格式，功能码介绍等-introduce the MODBUS protocol in detail including translation style ,function code etc.

射频卡读卡程序,射频IC卡识别技术，通常由载有密码的射频IC卡来代替传统的键盘密码。读卡模块读出密码后，即产生输出电信号，继而驱动执行机构动作，或将密码（如卡号）送给外围对接设备（如电脑或单片机等）。采用射频卡读卡模块及感应体构成的特定系统中，因射频卡内码信号唯一且不可复制，因此射频卡不仅杜绝了非法复制密码，还为各种控制采用信息化管理创造了条件。-RF card reader procedure, radio frequency identification technology IC cards, usually containing the password from the RF IC cards to replace the traditional keyboard password. Reader module read out a password, as a result, the output signal, and then drive the implementation agency action, or passwords (such as logging) gave the external docking equipment (such as computer or microcontroller, etc.). RF card reader module consisting of sensors and the specific system, RF signal code card but not the only copy, RF Card not only prevents illegal copying passwords, but also controls the use of information management to create the conditions.

CRC-16 校验码源码整理，虽然很简单，但整理的很详实-CRC-16 check source code collated, although very simple, but very detailed finishing

QPSK通过瑞利信道的MATLAB建模与仿真的程序-QPSK rayleigh channel matlab modeling and simulation

GSM_protocal，GSM的短消息协议，^_^-GSM_protocal, GSM short message protocol, ^ _ ^

可编程开关电容滤波器时钟产生电路的程控调节-Programmable switched-capacitor filter clock generator circuit conditioning program