A document about IrDA physical layer

QAM调制的基本原理 QAM调制实际上是幅度调制和相位调制的组合。相位 + 幅度状态定义了一个数字或数 字的组合。QAM的优点是具有更大的符号率，从而可获得更高的系统效率。通常由符号率 确定占用带宽。因此每个符号的比特（基本信息单位）越多，效率就越高。-QAM modulation of the basic principles are in fact QAM modulation amplitude modulation and phase modulation of the portfolio. Phase+ margin status defines a combination of numbers or figures. The advantage of QAM symbols are greater rate, thus the system efficiency will be higher. Symbol rate is usually determined by the occupied bandwidth. Thus each bit symbols (basic units of information) the more the higher the efficiency.

qam的vhdl程序，包含载波恢复等。同时含有modelsim仿真文件，希望有所帮助-qam vhdl modelsim

华为的硬件开发手册，网上大名鼎鼎的华为公司内部硬件开发的管理规范，很值得一读-huawei hardware development reference

G.723加解码程序-G.723 coding/decoding program

这是个很不错的编程代码，是有关于UDP的编程是由中科院的老师亲自编写的-this is a very good program code is on the UDP programming from the CAS is personally prepared by the teachers

STM32F103代码,5个串口同时工作，使用闲时中断.不用特殊字符，可以完整的接收完数据。

这个实际上是个总的GUI程序，已经完整编写好。此程序包括elm的3种training方法，以及硬件衔接的问题，只是其中的一些特殊路径需要做相应改动，才能使程序真正运行-this actually is a total of GUI program has been well prepared integrity. This process includes three types of elm training methods, and the convergence of the hardware, just some special needs to be done path corresponding changes to procedures can actually run

板卡驱动，非常有效的。关于数字电视。没设么可说了-Board-driven, very effective. With regard to digital TV. The absence of what can be said that the

seyon的kermit协议模块 -Protocol component of seyons kermit protocol

用VC++实现在PC平台的主从蓝牙HCI层数据传输-with VC PC platform in the main from the Bluetooth HCI layer data transmission