IT++ is a C++ library of mathematical, signal processing and communication system routines/functions. Its main use is in simulation of communication systems or for performing research in the area of communications.

通信系统的仿真，使用频率采样法做的，设计傅立叶变换等功能，很强大-Simulation of communication systems, using the frequency sampling method to do the design Fourier transform functions, it is powerful