| 1. | Design of bessel low pass filter in direct digital synthesizer
直接数字合成器中贝塞尔低通滤波器设计 |
| 2. | The primary work in this dissertation : ( 1 ) discuss the theory of dds and project implement
本文的主要工作如下: ( 1 )讨论了直接数字合成( dds )技术的工作原理和工程实现方法。 |
| 3. | The agilent technologies 33250a function arbitrary waveform generator uses direct digital - synthesis techniques to create a stable , accurate output on all waveforms , down to 1 hz frequency resolution
Agilent 33250a函数任意波形发生器使用了直接数字合成技术,可在所有波形上产生频率分辨率达 |
| 4. | Computer simulation of fire is an important research area . existing fire simulation techniques can be classified into two categories : direct numerical simulation and visual modeling
火焰模拟是自然景物模拟的一个重要研究内容，现有的火焰模拟算法分为两大类，直接数字合成与视觉效果建模。 |
| 5. | The agilent technologies 33220a function arbitrary waveform generator uses direct digital synthesis techniques to create a stable , accurate output signal for clean , low distortion sine waves
Agilent 33220a函数任意波形发生器使用直接数字合成dds技术,可生成稳定精确纯净和低失真的正弦输出信号 |
| 6. | With the development of modern digital technology and vlsi , the method of digital waveform synthesis of the pulse compression signals is now widely used in radar systems
现代数字技术和vlsi技术迅猛发展,波形合成已经由传统的纯模拟方法发展到现在的直接数字合成,数字方式获得脉冲压缩信号已成为现代雷达普遍采用的波形合成方法。 |
| 7. | Through the research of direct digital synthesizer ( dds ) used as a divider in phase lock loop ( pll ) , a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized
摘要通过对直接数字合成器在锁相环路中作为分频器应用的研究，使频率合成器可以在实现超细频率分辨率的同时达到高的频谱纯度。 |
| 8. | This paper studies the system and hardware design of the arbitrary waveform generator based direct digital synthesizer in detail . and a theoretical analysis of the system performance is also given
本文主要研究了基于直接数字合成( directdigitalsynthesizer )技术的任意波形发生器( arbitrarywaveformgenerator )的整体方案和核心部分的硬件设计。 |
| 9. | The essential requirements for the frequency synthesizer are : 1 ) . low side band power 2 ) . high hopping speed 3 ) . short convergence time direct digital synthesis technology has the advantages of low cost , low power consumption , high frequency discrimination and short switching time
直接数字合成技术dds具有低成本、低功耗、高分辨率和快速转换时间等优点，是实现快速跳频的一个关键技术。本文讨论了如何实现高速的跳频系统。 |
| 10. | The primary work in this dissertation : ( 1 ) the principle , design and implementation of generating lfm / nlfm signals based on direct digital synthesis ( dds ) technology have been discussed especially , the system has been implemented all by author
本文的主要工作之处在于： ( 1 )讨论了基于直接数字合成（ dds ）技术产生直接中频线性调频脉压信号和非线性调频脉压信号的工作原理、设计思想和工程实现方法，并独立完成了系统的工程实现。 |
