digital synthesis dds的意思|示意

This paper introduces the theory of the phase-locked loop (PLL) and the direct digital synthesis (DDS), a method to improve the precision of DDS and reduce its phase truncation error is also given.

介绍了锁相环(PLL)技术和直接数字式频率合成(DDS)技术的基本工作原理，给出了一种提高DDS输出频率精度及减小其相位截断误差的方法。

According to the technology of direct digital synthesis(DDS), a kind of low frequence signal source was introduced based on the Complex Programmed Logical Device(CPLD)and Single Chip Micyoco(SCM).

介绍了一种应用直接数字频率综合器（DDS）技术，基于可编程逻辑器件（CPLD）和单片机设计的低频信号源。

Firstly, a DDS-based method for digital-domain synthesis of time-varying Doppler frequency in dynamic GPS signal is proposed in this dissertation.

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。

This design construct an sinusoidal signal generator based on DDS(Direct Digital Frequency Synthesis), completed by MCU AT89S52 and necessary analog circuit.

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。

The fundamental principle of direct digital synthesis (DDS) is introduced in this paper. Based on signal analysis, the ideal output spectrum characteristic of DDS is analyzed briefly.

对DDS基本原理进行了简要介绍，利用信号分析的方法对DDS理想输出进行频谱分析。

The technique of direct digital synthesis(DDS)is a novel frequency synthesis technique.

直接数字频率合成（DDS）是一种新型的频率合成技术。