频率合成技术
- 名frequency synthesis technique
-
同时,计算机和微电子技术的迅速发展使得频率合成技术有了新的突破,出现了直接数字频率合成DDS技术。
Meanwhile , frequency synthesis technique makes new breakthrough because of the mushroom growth of computer and micro-electronics technology , and then the theory of direct digital frequency synthesis ( DDS ) is proposed .
-
摘要本文综合考虑到频率合成技术及单端口体波谐振器HBAR的特点提出了一种基于一阶非线性PLL的锁相频率合成方案。
Through considering both the frequency synthesis technique and the single port HBAR features , a plan based of the first order nonlinear PLL is designed . A practical frequency hopping oscillator is designed and its theory is discussed in detail .
-
生成跳频射频源的技术,就是直接数字式频率合成技术,技术简称DDS(DirectDigitalFrequencysynthesizer)技术。
This technology is DDS ( Direct Digital Frequency Synthesizer ) .
-
本文采用了数字频率合成技术(DDS)来产生调制信号,它具有超宽的频率带宽、超高的频率分辨率和相位连续性等特点,可以实现声光调制信号的频率和振幅的高稳定性。
The modulating signal is generated in the way of Direct Digital Synthesizer technology .
-
UHF单环跳频频率合成技术的研究
Research of a Single-loop Hopping Frequenc Synthetic Technique at UHF Frequenc Band
-
DDS是近几年发展起来的新型频率合成技术,具有为广阔的应用前景。
DDS is a new frequency-synthesis technology developed in recent years , it has a bright prospect .
-
直接数字合成器(DirectDigitalSynthesizer,DDS)是近年来迅速发展起来的频率合成技术,具有频率分辨率高、频率捷变等诸多优点。
Direct digital synthesizer ( DDS ) is a rapidly developing frequency synthesis technology . It has high frequency resolution and extremely fast hopping speed .
-
直接数字合成(DirectDigitalSynthesize,DDS)是一种重要的频率合成技术,具有分辨率高,频率变换快等优点。
Direct digital synthesize ( DDS ) is an important technology in the frequency synthesizing with some advantages of higher frequency resolution , faster frequency transform etc.
-
基于CORDIC算法的高速直接数字频率合成技术的ASIC实现
ASIC Realization of High Speed Direct Digital Frequency Synthesizer Based on CORDIC Algorithm
-
基于CORDIC算法的直接频率合成技术的研究和应用
Implementation and Studies on Direct Digital Frequency Synthesis Based on CORDIC Algorithm
-
直接数字频率合成技术,即DDS,是一种新型的频率合成技术和信号产生方法。
The technology of direct digital frequency synthesis ( DDS ), is a new typed synthesizer technology and signal frequency methods .
-
PLL混合频率合成技术能综合两者的优点,已成为现今频率合成领域的重要研究方向。
DDS hybrid PLL can take good advantage of both their merit , have become an important area of frequency synthesis .
-
采用PLL频率合成技术,对适用于宽带接收前端系统的宽带微波频率源进行了设计。
PLL frequency synthesizer technology is adopted to design broadband microwave frequency source , which is suitable for broadband receiver front-end systems .
-
DDS技术是一种先进的频率合成技术,其主要优点是易于程控,相位连续,输出频率稳定度高,分辨率高。
DDS is an advanced technique on frequency synthesis , whose primary advantages are controlling facility , continuous phase and fine frequency resolution .
-
特别是直接数字频率合成技术(DDS)需要快速、复杂、灵活的控制来发挥其优点。
Direct digital frequency synthesis technology ( DDS ) often requires fast , complex and flexible control in order to exert its merits .
-
直接数字频率合成技术(DFS)一种先进的频率控制技术。
Direct digital frequency synthesis ( DDFS ) is an advanced technique for frequency synthesis .
-
本文采用了完全数字化的方法,是利用直接数字频率合成技术的原理,并基于DSP的系统实现MSK调制。
The thesis used a fully digital method that employed the principle of direct digital frequency synthesis to realize the modulation based on DSP .
-
文章主要分析了如何利用基于矢量旋转的CORDIC(COordinationRotationDIgitalComputer)算法实现高速高精度的直接数字频率合成技术(DDS)。
This paper analyses a ASIC method that realizes the high speed and high precision Direct Digital Frequency Synthesizer ( DDS ) with the CORDIC ( Coordination Rotation Digital Computer ) algorithm based on vector rotation .
-
将数字技术与传统频率合成技术结合,就产生了直接数字频率合成技术(DDS),这是频率合成技术领域的一次重大革命。
Combined the digital with the traditional frequency synthesis technology , direct digital frequency synthesis is generated . It is an important revolution in the area of frequency synthesis .
-
本文设计了一台高精度程控相移信号发生器,利用直接数字频率合成技术(DDS)的理论,输出频率稳定度高,分辨率高。
This paper designs a high-precision programmable phase shift signal generator using direct digital frequency synthesis ( DDS ) theory , the output high frequency stability , high resolution .
-
介绍了近年来DDS杂散抑制技术的发展,研究了相位抖动法、混合式频率合成技术和相位内插法的原理与应用。
The development in spurious reduction technology of DDS in the recent years is introduced . The principle and application of phase-moving , admixture-frequency syntheses , inside-phase are studied .
-
第三章分析了现阶段比较常用的跳频源技术合成方法,详细比较他们的优缺点,在此基础上提出了并行DDS激励PLL的微波捷变频率合成技术。
Chapter 3 , the methods of the frequency synthesizer in commom use are analyzed and compared , and the advantages and disadvantages of each technique was also introduced .
-
仅用单片FPGA就实现了直接数字频率合成技术(DDS),产生稳幅正弦波,并在数字域实现了AM、FM、ASK、PSK等四类调制信号。
The DDS , Direct Digital Synthesizer , which is implemented by a unique FPGA IC , can provide the stable sine signal with digital AM , FM , ASK , PSK modulation .
-
数字直接频率合成技术(DDS)可使频率稳定度达到晶振的水平,采用DDS技术的新型选频电平表和电平振荡器的技术性能将显著提高。
The technic capability of new type Selective Level Meter and Level Oscillator adopting Direct Digital Synthesis ( DDS ) is advanced notability , it makes stability of frequency achieve level of crystal ?
-
本文主要描述利用FPGA现场可编程门阵列器件作为控制核心,结合DDS数字频率合成技术直接形成SPWM脉宽调制波。
Combine with the direct digital synthesizer ( DDS ) technology , use field programmable gate array ( FPGA ) chip as control unit , directly generate the sine pulse width modulation ( SPWM ) .
-
接着详细介绍了基于频率合成技术的线性调频源的基本理论,主要包括:DDS技术、锁相频率合成技术、正交调制技术、微波开关。
Secondly , The main theory of LFM synthesizer based frequency synthesis technology has been analyzed in detail , mainly including : DDS technology , PLL technology , Microwave switch and orthogonal modulation technology .
-
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 .
-
由于DDS固有杂散较大,要使DDS在频率合成技术中有效地发挥作用,就必须对其杂散特性充分了解。
Since the inherent spur performance of DDS is not in perfect condition , so , in order to make DDS work effectually , it is very necessary to understand the spur performance of DDS fully .
-
通过分析研究直接数字频率合成技术DDS波形发生器的原理与实现,给出了教学实施的具体内容和参考方案。
In this paper , a new teaching scheme on Direct Digital Frequency Synthesis ( DDS ) and its content are presented for reference , based on the analysis on the principle and implementation of DDS .
-
PLL是比较成熟的频率合成技术,它有杂散抑制性能好、输出频带宽的优点,但其频率转换速度慢,频率分辨率不高。
As a well developed frequency synthesis technology , PLL ( Phase Locked Loop ) is good at spurious behavior and wide frequency bandwidth , but it has weakness on frequency switch speed and frequency resolution .