vc modem通信代码

通信协议的解析和分析，主要是看它的校验码。-Analysis of communication protocols and analysis, mainly to look at its validation code.

Document on 3g and it s principles

TOP PORT (USB) 调试接口说明 本接口是利用PL-2303HX的USB转RS232的接口芯片设计实现了一个TTL(5V)的RS232串口，并且利用了PL-2303HX的2个GPIO口软件模拟了一个低速的I2C总线.该接口由USB接口提供5V电压，可自带2Kbit(24C02)数据备份EEPROM (单独读写通道,不占用I2C总线地址)。并可对外提供小于250mA的5V电压。尤其适合WIN-XP以后的没有并口和串口笔记本电脑。整机成本不到￥20RMB。 -TOP PORT (USB) interface debugging of this interface is the use of PL-2303HX the USB to RS232 interface chip design to achieve a TTL (5V) of the RS232 serial port, and use of PL-2303HX the two GPIO port software simulation of a low-speed I2C bus. The interface from the USB interface to provide 5V voltage, can bring their own 2Kbit (24C02) data backup EEPROM (separate read and write access, do not occupy I2C bus address). And may provide less than 250mA of 5V voltage. WIN-XP is particularly suitable for subsequent parallel and serial no notebooks. Machine costs less than ￥ 20RMB.

小数时延滤波器，传统的方法实现小数时延，一般采用插值、滤波、抽样的方法来实现小数时延。该方法需要高的系统处理速率和大的存储空间。而小数时延滤波器，非常方便、简单，能够提高系统的性能。该程序包含各种小数时延滤波器，非常有用。

中文版本的RFC3261文档，内容非常详细准确，如果觉得英文文档不容易理解，这个文档就比较合适了。-Chinese version of the RFC3261 document, the content is very detailed and accurate, if they feel the document is not easy to understand English, this document would be more appropriate in.

电力系统通讯用iec-104，主站，子站，协调通讯，超时机制-Power system communication iec-104, master station, sub-stations, the coordination of communications, time-out mechanism

简化SPCOMM，去掉一些编程不常用功能 串口通讯控件-Serial Communication Control

OFDM下卷积码译码器CC码的源代码，欢迎大家下载参考！-OFDM convolutional codes under the CC decoder source code, welcomed everyone to download the reference!

基于CSerialPort的串口多线程通信框架-CSerialPort based on serial communication framework for multi-threaded

低密度码信道编译码算法，程序有信道模拟，matlab语言实现，主要研究规则低密度码-channel low-density code encryption algorithm, the procedure channel simulation, Matlab language, the main rules of low-density code