介绍了基于直接数字频率合成技术的双通道任意波形信号发生器。
The double channel arbitrary wave generator based on direct digital frequency synthesis is introduced.
直接数字频率合成技术(DDFS)是一种先进的频率控制技术。
Direct digital frequency synthesis (DDFS) is an advanced technique for frequency synthesis.
数字查表法合成周期信号是一种最常用的直接数字频率合成技术。
Digital look up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis.
提出基于频相的直接数字频率合成技术（DDFS）实现采样的跟随时钟。
Offering direct digital frequency synthesis (DDFS) based on the frequency -phase to achieve the following sampling clock.
本文首先介绍了直接数字频率合成技术的原理和结构，并分析了其噪声来源和抑制方法。
Firstly, this paper introduced the principle and structure of direct digital frequency synthesis and analyzed the source and suppression methods of frequency noise.
在此基础上，介绍了小数分频器在直接数字频率合成技术和步进电机驱动速度控制中的两种常见应用。
Applications of decimal Fraction frequency divider in the area such as direct digital frequency synthesis technology and stepper motor drive speed controller a re introduced.
介绍了直接数字频率合成技术以及分析其杂散误差，对相位截断误差和幅度量化误差进行了傅立叶级数分析研究。
The spectrum characteristics of the phase truncation error and amplitude quantization error are analyzed by the method of Fourier series.
首先对直接数字频率合成技术(DDS)和锁相频率合成技术(PLL)的基本原理、特点及相噪特性作了详细的分析。
Firstly the basic theory of DDS and PLL, as well as their characteristics and phase noise properties have been analyzed detailedly.
论文首先基于直接数字频率合成技术提出了一种能够在数字域内直接合成出动态信号中时变多普勒频率的信号合成方法。
Firstly, a DDS-based method for digital-domain synthesis of time-varying Doppler frequency in dynamic GPS signal is proposed in this dissertation.
该系统采用了直接数字频率合成技术(DDS)和并发处理技术，提高了系统的性能和处理速度，较大程度地减少了硬件延时。
The system USES direct digital synthesize (DDS) and parallel processing technique, improves the performance and speed of the processing, and reduces the hardware delay mostly.
本设计采用AT89S52单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术（DDS）的正弦信号发生器。
This design construct an sinusoidal signal generator based on DDS(Direct Digital Frequency Synthesis), completed by MCU AT89S52 and necessary analog circuit.
直接数字式频率合成(DDS)技术是一种全数字频率合成技术，其特殊的原理和结构使它具有多种调制能力。
Direct digital synthesis (DDS) is an all digital frequency synthesis technique. Because of its special theory and construction, it has many kinds of modulation capability.
本文介绍了一种基于CPLD的直接数字频率合成（DDFS）的实现方法，详细阐述了采用此技术设计多功能信号发生器的方法。
This paper introduces a design of Direct Digital Frequency Synthesis(DDFS) based on CPLD, and describes clearly the design method of a multi-function waveform generator using DDFS.
直接数字式频率合成技术(DDS)是一种先进的全数字频率合成技术，本文基于DDS的相位调制功能，给出了一种DDS数字移相器的设计方案。
Direct digital synthesis (DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.
提出了一种基于改进直接数字频率合成(DDS)技术的现场可编程门阵列(FPGA)数字调制器设计与实现方法。
In this paper a method of designing and implementing Field Programmable Gate Array (FPGA) digital modulator based on the improved Direct digital Synthesizer (DDS) technology is presented.
系统采用计算机控制下的直接数字频率合成(DDS)技术，实现电调谐波长扫描。
Using DDS (Direct Digital Synthesizer) technique under control of single-chip computer, electronic-tunable wavelength scanning is realized.
该芯片采用了改进的直接数字频率合成算法、流水线结构与ROM分时复用技术，保证了芯片的高性能和速度，节省了芯片面积。
A modified direct digital frequency synthesis (DDS), pipelined structure, and time-sharing ROM are adopted in the chip, for saving chip area and ensuring high performance and speed.
采用高精度的直接数字频率合成（DDS）和数字锁相环技术，实现了高频率跟踪精度。
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
采用直接数字频率合成(DDS)技术，实现波形发生器。
It also presents the realization of wave form generation with DDS technology.
本文在传统的相位法激光测距原理的基础上，提出了一种把直接数字频率合成(DDS)技术和数字信号处理(dsp)技术相结合的新的相位激光测距方法。
Based on the principle of phase laser range finder, a new method of utilizing Direct Digital Synthesizes (DDS) technique and Digital Signal Process (DSP) technique is proposed in this paper.
直接数字频率合成(DDS)技术是目前广为应用的一项频率合成技术，它具有频率转换时间短、频率分辨率高、可编程等特点。
DDS (direct digital synthesis) is a sort of frequency synthesis technique, which has advantages such as short frequency conversion time, high resolution in frequencies, programmability and so on.
首先，本文对数字频率直接合成(DDS)技术的特点进行介绍，提出一种基于DDS技术的任意波形发生器(AWG)的改进结构。
First of all, this thesis introduces the features of Direct Digital Frequency Synthesis (DDS) technique and gives a new structure of the Arbitrary Waveform Generators (AWG) base on DDS technology.
本文主要讨论了数字频率直接合成(DDS)技术特点及其应用。
This thesis mainly discusses the Direct Digital Frequency Synthesis (DDS) technique and its applications.
直接数字频率合成（DDS）是一种新型的频率合成技术。
The technique of direct digital synthesis(DDS)is a novel frequency synthesis technique.
自1971年第一次被引入以来，直接数字频率合成(DDS)技术一直是频率合成技术研究的热点。
Direct Digital frequency synthesis (DDS) technology has always been the hotspot of study on frequency synthesis technology, since it was introduced in 1971 firstly.
在第二章中，主要介绍直接数字频率合成器（DDS）的工作原理，对DDS的系统结构，工作原理，技术指标，频谱特性，优缺点进行了阐述。
Then the work theory, system structure, technology index, spectrum characteristic, merits and defects of Direct Digital Synthesis (DDS) are introduced mostly in the second chapter.
直接数字频率合成是一种新的频率合成技术；
The direct digital frequency synthesis(DDS) is a new frequency synthesis techniques.
直接数字频率合成是一种新的频率合成技术；
The direct digital frequency synthesis(DDS) is a new frequency synthesis techniques.
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