本例用matlab语言实现了4QPSK的编解码及通过awgn信道的仿真。采用蒙特卡罗仿真法，得到误码性能，绘制曲线。可用于算法研究或课程学习。...

This paper will discuss the design of an asynchronous FIFO,Asynchronous FIFOs are widely used in the computer networking industry to receive data at a particular frequency and transmit them at another frequency. An asynchronous FIFO has two different clocks: one for read and one for write.-Asynchrinous FIFO design

ISDN-Objects专门为DELPHI设计并优化。只要用简单的方法（如Connect/Disconnect/Sendfile/ReceiveFile等），你可以立刻在你的程序中加入ISDN的功能。超级的性能也是亮点之一。数字电话文件传输或传真，ISDN-Objects是你更快地开发ISDN应用的理想工具。ISDN-Objects的技术数据：非常简单的方法用以在最快速度下发送和接收数据，在线帮助，无限通道，无限控制器，CAPI 2.0，与ISDN卡生产商武官，编程简单，强大的高层方法（如SendFile / SendWave），支持所有ISDN协议数据压缩（如果CAPI驱动支持，将采用V.42bits），将电话实时转换到WAVE或反之。-ISDN-Objects for DELPHI design and optimization. As long as a simplistic way (such as Connect/Disconnect/Sendfile/ReceiveFile, etc.), you can immediately in your program to add ISDN function. Super is one of the highlights of the performance. File Transfer digital telephone or fax, ISDN-Objects is the faster you develop the ideal tool for ISDN applications. ISDN-Objects of the technical data: a very simple method for the fastest speeds in the send and receive data, online help, unlimited access, unlimited controller, CAPI 2.0, with the ISDN card manufacturers attache, programming is simple, powerful high-level methods (such as SendFile/SendWave), support all the ISDN

DNP 3.0通讯规约，包括数据链路层、传输层、应用层、数据对象库4部分。-DNP 3.0 communication Statute, including the data-link layer, transport layer and the application layer, the data object library four parts.

1、FIR数字滤波器的设计（1）在主函数中调用dsnFIR函数，滤波器参数设为21阶、带阻、矩形窗、采样率1000Hz、上下截止频率分别为100Hz,400Hz；（2）利用drawFIR函数分别画出所设计的FIR滤波器的幅频特性图和相频特性图。2、FIR数字滤波实现（1）编写一个输入信号子程序func()，输入信号为一连续函数，表达式为；（2）对输入信号进行采样，即       ，这里取采样率，得到离散序列x(n)；（3）取x(n)中前40个点的值，将其转为复数存入复数数组x[64]中，并对x[64]做64点的FFT，得到的X(k)存回x[64]中；（4）已知在主函数中调用dsnFIR函数后得到的输出结果b[21]即为FIR滤波器单位冲激响应h(n)的值，将其转为复数存入复数数组h[64]中，并对h[64]做64点的FFT，得到的H(k)存回h[64]中；（5）已知用FIR滤波器对输入信号进行滤波就是将输入信号x(n)与滤波器单位冲激响应h(n)做卷积运算，故我转到频域采用FFT方法实现对输入信号x(n)的滤波，即将X(k)与H(k)相乘，得到滤波后信号的FFT变换Y(k)，然后只需对Y(k)做IFFT变换即可得到滤波后信号y(n)。

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!

A reference of SIP protocol stack, very good.-A reference of the SIP protocol stack, very good.

网口扫描分析软件,可以帮助初学网络编程的人了解TCP/IP协议栈-Network port scanning analysis software, can help people to understand the beginner Network Programming TCP/IP protocol stack

mc55-AT,2008-10-13,mc55_56 AT命令集 mc55_56 AT命令集 -mc55-AT ,2008-10-13, mc55_56 AT command set mc55_56 AT Command Set

一篇统计文章，计算组合标准差，可用。小样本合并成大样本时候计算标准差