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- MMW high resolution radar range profile two-step stretch processing method direct digital synthesis （DDS）. 标 签 毫米波高分辨雷达 距离像 双脉冲伸缩处理 直接数字合成(DDS).
- Direct digital synthesis (DDS) is used widely more and more, because its unique performance. 直接数字频率合成（DDS）技术，因为其独特性能，得到了越来越广泛的应用。
- You get standard waveforms along with the flexibility to create your own using direct digital synthesis for a stable, accurate output. 除标准波形外,还具有使用直接数位合成得到稳定和精密输出的灵活性。
- The technology of direct digital synthesis is applied to realize signal source with the frequency range from 1Hz~5MHz, and the minimum frequency absolution to 0.2Hz. 信号源采用直接数字合成原理实现;频率范围从1Hz-5MHz;最小分辨率为0.;2Hz。 高速数据采集使用12位A/D转换器;最高采样频率40MHz。
- In this paper, a method using direct digital synthesis (DDS) combined with mixing technique for implementing quick frequency-hopping synthesizer in FH/DS system is presented. 提出了一种在FH/DS系统中以DDS技术为核心，结合直接式技术构成混合快跳频频率合成器的设计方法。
- The realization method of DDS(Direct Digital Synthesis) technology based on the FPGA is introduced,and its superior technical characteristic is analyzed. 介绍了直接数字频率合成技术的实现方法,分析了其优越的技术特性。
- We design and complete a multi-frequency source current module, applying the Direct Digital Synthesis (DDS) technology. We use the DSP chip as our controller and the frequency, phase and amplitude of the signal are all programmable and adjustable. 设计并完成了多频恒流源模块,采用了直接数字合成(Direct Digital Synthesis,DDS)技术,应用数字信号处理器(DSP)作为控制器,实现了频率、相位和幅值均动态可调。
- A virtual instrument based integrated measurement system for Doppler navigation radar is developed. Using direct digital synthesis(DDS)technique,a kind of radar Doppler frequency simulator is introduced. 分析了机载四波束多普勒测速雷达的工作原理,采用直接数字频率合成(DDS)技术进行多普勒频移模拟器的设计,通过数字控制,该模拟器可以产生高分辨率的多普勒频率信号；
- Basing on the discussion of principle and characteristic of direct digital frequency synthesis(DDS) and phase-locked loop frequency synthesis(PLL),a design scheme of frequency synthesizer combining direct digital synthesis used for modern radio is given. 介绍了DDS(直接数字频率合成)技术及PLL(锁相环)频率合成技术的工作原理及特点,给出了现代电台设计中基于DDS的频率合成器的设计方案。
- Direct digital synthesis is a new signal synthesis technique developed very fast in recent years. introduce the principle of DDS, disscus the application and development trend of DDS in Moden Radar and ECM superficially. 直接数字合成技术是近年来迅速发展起来的一种新型的信号合成技术,介绍了DDS的原理,对其在现代新体制雷达和电子对抗领域中的应用及其发展前景进行了初步讨论。
- 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。
- 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。
- quadrature direct digital synthesis(QDDS) QDDS
- DDS ( Direct Digital Synthesis ) technique DDS技术
- Direct Digital Synthesis ( DDS ) 直接数字频率合成
- direct digital synthesis technique 直接数字合成技术
- Generating Radar Chirp Signal with Direct Digital Synthesis Method 使用直接数字频率合成的雷达线性调频信号产生技术
- Realization of Digital Modulation Based on Direct Digital Synthesis (DDS) 基于DDS技术的多种数字调制的实现
- Keywords: radar signal generator; DDS（Direct Digital Synthesis）; frequency tuning word; LFM; PSK; timing control 关键词:雷达信号源;DDS（直接数字合成）;频率控制字;线性调频;相位编码;时序控制
- (2)the bulk acoustooptic frequency shifter(AOFS) with direct digital synthesis(DDS) electronics; (2)声体波的声光移频器(AOFS)及其直接数字合成(DDS)的控制电路；
