Digital down conversion plays a key role in the digitized and software-oriented process of the receiver system.

数字下变频在接收系统的数字化和软件化过程中起到了至关重要的作用。

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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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This paper deals with the design and implementation of Digital Up Conversion and Digital Down Conversion based on the field-programmable gate array (FPGA).

本文主要研究的是基于现场可编程逻辑阵列（FPGA）的数字上下变频技术的设计和实现。

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Some of that is being forced by the United States and the corn to ethanol conversion program that has pushed up the price of corn a great deal, pushed down the world supply of corn for eating, and pushed up world prices.

美国在一定程度上推动了这件事,玉米向乙醇转化项目,大大抬高了玉米价格,削减了可供食用玉米的供应量,世界玉米的价格就提高了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The Fighting Irish were 25% on third down conversion and 0% on fourth down.

FORBES: Why Was Alabama Able To Blow Out Notre Dame?

Sandwiching the solar cells inside the device would block some light out and knock down power conversion efficiency even further, Filler cautioned.

FORBES: Magazine Article

Simply stated, ParkerVision is seeking unspecified damages and injunctive relief for infringement of various patents related to RF receivers and the down-conversion of electromagnetic signals.

FORBES: Qualcomm Is In A David-And-Goliath Patent Infringement Fight With A Tiny Tech Company