DSP accomplishes the baseband signal processing, the DDC and the DUC deal with the transformation between baseband signal and IF signal, multi-sample rate signal processing, signal modulation and demodulation.

• 系统中DSP主要完成基带信号的处理，上下变频器完成基带和中频信号之间的转换、系统的多抽样率信号处理和信号的调制解调。