载波同步是QPSK信号相干解调的关键技术。

alert 和 timer的示例,初学者可以看看,入门级的示例-alert and the timer example, beginners can take a look at an example of entry-level

基于OSIP协议栈实现的UA客户端和UA服务器端的基本实现文档（内含详细代码）。是SIP电话开发的有用参考-OSIP-based protocol stack to achieve the UA client and server-side UA to achieve the basic document (containing the code in detail). The development of SIP phones is a useful reference

qpsk调制在awgn/rayleigh信道下的误码性能比较，以及信号的功率谱和星座图-QPSK modulation in awgn/Rayleigh Channel Performance Comparison of error, and the signal power spectrum and constellation

NS2中的模拟场景脚本自动生成工具，非常方便-NS2 scenes in the script automatically generates simulation tool, a very convenient

自己编写的一个聊天软件，比较简单，但很实用。-I have written a chat software is relatively simple, but very practical.

一个小的试验，通过在vb环境下设置串口并发送和接收数据的小程序。-a small trial, in vb environment and set up serial transmit and receive data of small procedures.

关于智能天线误码率的研究，使用智能天线后，可明显减少系统的误码率，提高通信质量-Bit error rate on the smart antenna research, the use of smart antennas can significantly reduce the system bit error rate, and improve communication quality

用于串口通信的类文件:SerialPort.h SerialPort.c-For serial communication class files: SerialPort.h SerialPort.c

A satellite is any object that orbits another object. In popular usage, the term satellite normally refers to an artificial satellite. A planet, or any other body, which finds itself at any distance from the sun with no "sideways" velocity will quickly fall without missing the sun.-A satellite is any object that orbits another object. In popular usage, the term satellite normally refers to an artificial satellite. A planet, or any other body, which finds itself at any distance from the sun with no "sideways" velocity will quickly fall without missing the sun.

SIM300 GPRS 中文使用手册，希望对您有用-SIM300 GPRS Chinese user manual, want to be useful for you