利用直接数字合成(DDS)技术完成对数据的调制。
And while programmed on DSP, we modulated data by the way of Direct Digital Synthesizer (DDS).
介绍了利用直接数字合成技术产生频率扫描信号的新方法。
A novel method of direct digital synthesizing frequency sweep signal is presented.
此方法利用直接数字合成技术完成对方波的频率和振幅的调整。
Direct digital synthesis is used for modulating the frequency and amplitude of the square wave.
利用直接数字合成器(DDS)对夹心式换能器进行扫频，测得两个不同共振频率附近的导纳圆。
The direct digital synthesizer (DDS) is used to sweep frequency for a sandwich piezoelectric transducer two admittance circles of the transducer about two different resonance frequencies is measured.
在利用直接数字式合成方法产生周期信号时，信号的频率分辨率和带宽直接受限于合成系统的工作频率和存储容量。
In the direct digital synthesis of periodic signals, the frequency resolutions and bands of the synthesized signals are limited by the working frequency and data capacity of the synthesizing system.
介绍利用复杂可编程逻辑器件CPLD和直接数字合成专用电路dds，设计雷达信号回波模拟器的硬件系统。
Introduce how to design hardware system structure of radar signal echo simulator by using CPLD and DDS.
首先简要介绍DDS的工作原理及其性能，然后阐述如何利用AD985 1芯片设计一个高精度直接数字式合成频率源。
This paper briefly introduces the basic principles and the performance of DDS. Then it mainly describes how to use AD9851 chip to design a direct digital synthesis frequency source with high accuracy.
首先简要介绍DDS的工作原理及其性能，然后阐述如何利用AD985 1芯片设计一个高精度直接数字式合成频率源。
This paper briefly introduces the basic principles and the performance of DDS. Then it mainly describes how to use AD9851 chip to design a direct digital synthesis frequency source with high accuracy.
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