调制解调器的命令，可直接控制设备动作，读取更详细的信息。...

OFDMA, Orthogonal Frequency Division Multiple Access is a broad band communication method. Here channel estimation is more crucial. Based on the FFT size used for OFDM transmission method that many number of channel co-efficients are to be estimated and received signals are to be equalized using this co-efficients. Various methods trying to improve the performance and fastness are proposed. As part of master thesis various methods have be studied and evaluated using the WiMAX 802.16 system.

In this simulink model , BPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.-In this simulink model , BPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.

1、移植delphi spcomm到VC++。使用多线程方式分别读写。2、利用windows api 枚举系统串口，查找注册表等获得系统串口列表。3、响应usb-to-rs232器件热插拔消息，并将相关信息添加到串口列表中。

喜欢数学建模的朋友可以看看哦！！这里面的算法还是比较先进的！-like mathematical modeling friends can see oh! ! There"s a fairly sophisticated algorithm!

openmcu 是开源的H.323会议服务器,需要pwlib 和 openh323的支持。-openmcu revenue is H.323 server, openh323 and pwlib needs support.

fd_set参数：一个用于检查可读性（readfds），一个用于检查可写性（writefds），另一个用于例外数据（exceptfds）。从根本上说， fd_set数据类型代表着一系列特定套接字的集合-fd_set parameters : a check for readability (readfds) one could write a check for (writefds) Another exception for the data (exceptfds). Fundamentally speaking, fd_set data types represent the range of specific set of socket

turbo code description document

他可以完成HDLC帧的删零功能，使得收端能够正确的恢复出HDLC中携带的信息-it can delete the zero from the HDLC frame ,make the information correct.

Mobile Radio Channels Modeling in MATLAB

基于Volterra滤波器的混沌背景弱信号检测.-Volterra filter based on the chaotic background of weak signal detection.