4QAM_2.5GHz

基于OPNET的卫星通信程序，为Opnet网络仿真书籍的实例(based satellite communications procedures for Opnet Network Simulation examples of books)

Pin configuration for hy-640 GSM module

完全实现多串口通信，使用C#测试，完全通过(Multiple serial communication)

说明：  这是自由空间路径损耗的代码。里面有多个m文件(This is the code of path loss in free space. There are multiple M files in it.)

使用tapi实现的用语音modem进行接电话并播放wav文件的程序(A program which is realised by tapi, and in which a call is picked up and wav files can be played through voice modem )

这是当前国际蓝牙标准组织发布的Bluetooth 4.0 最新的低功耗蓝牙的血压计的实例程序，对开发者很多参考价值(This is published by the International Bluetooth standard Bluetooth 4.0 the latest low-power Bluetooth blood pressure monitor an instance of the program, the developer a lot of reference value)

说明：  传输ofdm数据，采用了简单的多径信道，实现水下通信，整体程序还可以，可以参考参考(In order to transmit OFDM data, a simple multi-path channel is used to realize underwater communication. The overall program can also be used for reference)

DFTS--OFDM 仿真程序 包括详细的PAPR仿真 均可运行 (DFTS- OFDM simulation program should include a detailed simulation of the PAPR can be run)

Automatic navigation system

该程序实现了跳时UWB技术的调制与解调，对于UWB系统的设计具有一定参考价值(this program realize TH UWB with modulation and demodulation module.it has significant value for UWB system design.)