摘要
基于带通采样的数字下变频技术是高速数字信号处理的关键技术之一,本文研究了基于带通采样的中频数字下变频和射频数字下变频实现技术,给出了相应的频率变换关系,并指出了工程实现时要注意的问题,通过计算机仿真和实际实验,证明这种技术简单可行,有较高实用价值。
DDC (Digital Down Converter) technology based on band-pass sampling is a key of high-speed digital signal processing. The band-pass sampling intermediate frequency DDC and radio frequency DDC technology are researched. The frequency transformation relations are proved and the problems in engineering realization are also pointed out. The computer simulation and real experiment show that this is a simple, practical and high valuable technology.
