Having studied the digital down-conversion(DDC)process of IF signal before the base band process which follows A/D conversion in wireless communication,the paper puts forward a new idea of utilizing the FPGA to realize multi-channel digital signal DDC.

• 研究了无线通信接收机中,经A/D转换后到基带处理前的中频信号的下变频处理。 提出了用FPGA实现多通道数字信号下变频的新设想。