tongxinfangzhen2

正交频分复用系统中信号的调制与解调，我们用傅里叶反变换和变换来实现(Orthogonal frequency division multiplexing system signal modulation and demodulation, and we use the inverse Fourier transform to achieve transform)

关于OPNET比较权威的一本书，包括范例及实验(A book about OPnet simulation software, which includes the example of simulating large networks)

印度尼西亚大学电子学院的的OFDM程序,非常好,(The OFDM program of the School of Electronics at the University of Indonesia is very good,)

说明：  UR旋转矢量转化，转化为RPY坐标，更加适合编程，非常靠谱(UR Rotation Vector Conversion)

OFDM信号功率谱和频谱的MATLAB实现(Realization of Power Spectrum and Spectrum of OFDM Signal by MATLAB)

说明：  Log4net.dll是著名的Apache软件为.net framework 2框架准备的支持库，方便在不同的平台上得到功能支持。(Log4net. DLL is a support library prepared by Apache software for.NET Framework 2. It is convenient to get functional support on different platforms.)

并口通讯，通过并口控制打字机刻在自行车上，防止自行车丢失(Parallel port communication, and by the parallel port control typewriter engraved on the bike, to prevent the a bike to lost)

说明：  qpsk信号插入导频，使用升余弦滤波器，利用导频估计信道，在simulink中仿真(inset pilot in QPSK signal, use square root raised cosine filters in simulink)

1）设计Butterworth型音频抗混叠滤波器； 2）参数： 下通带频率300Hz；上通带频率3400Hz； 下阻带频率280Hz；上阻带频率3600Hz； 通带最大衰减0.3dB； 阻带最小衰减40dB； 3）采用一低通滤波器和一高通滤波器级联； 4）分别确定LPF和HPF的性能指标； 5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线； 6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。(1) the design of Butterworth-type audio anti-aliasing filter 2) parameters: passband frequency of 300Hz on pass-band frequency 3400Hz under the stop-band frequency of 280Hz on stop-band frequency 3600Hz passband maximum attenuation of 0.3dB minimum stopband attenuation of 40dB 3) the use of a low-pass filter and a high-pass filter cascade 4) separately to determine the performance of LPF and HPF target 5) to derive two-filter system function and frequency response, and draw its increase frequency characteristic curve 6) for the entire filter system function and frequency response, and draw its amplitude-frequency characteristic curve.)

说明：  TCP/ip通讯客户端的程序。VB程序编写WINSOCK控件应用(TCP/ip messaging client program. VB programming WINSOCK Control Applications)