Digital down - conversion (DDC) is an important technique of digitized radar receiver.

数字下变频技术是数字化雷达接收机的关键技术之一。

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This paper analyzes the digital down conversion (DDC) of wideband reconnaissance receiver IF digital signal based on polyphase filtering.

分析了基于多相滤波结构的宽带侦察接收机中频数字信号下变频处理方法。

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We also introduced some concept of digital radio, including digital direction synthesizer (DDS) and digital down conversion (DDC) and digital filter.

介绍了数字直接合成器 （DDS）、数字下变频器 （DDC）、数字滤波器等数字无线电经常用到的概念 。

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