数字合成

一种基于DSP的数字合成正弦波发生器

DSP-Based Digital Synthesize Sine Wave Generator

介绍了一种采用直接数字合成（DOS）技术的雷达目标多普勒频率模拟器。

A DDS & based radar target doppler frequency simulator is introduced .

双RAM直接数字合成任意波形发生器微机插卡研制

Development of a direct digital Synthetic based arbitrary waveform generator PC compatible card with double RAMs

提供了一个利用现场可编程门阵列（FPGA）实现正交直接数字合成（DDS）专用电路的设计实例。

A design example of FPGA - based quadrature direct digital synthesizer ( DDS ) chip is presented .

为了消除运动伪迹，本文提出了一种新的多源数字合成X射线体层成像扫描方法，将该方法应用到动态重建场合，对两种动态数字模型进行仿真重建。

To reduce the motion artifacts , a new multi-source scanning configuration was proposed for tomosynthesis in dynamic reconstruction using two dynamic digital phantoms .

本文的结果证实了多源数字合成X射线体层成像在动态重建中的有效性，对于进一步改善心脏和呼吸运动成像质量具有积极的实际意义。

The paper confirmed the effectiveness of multi-source tomosynthesis in dynamic reconstruction which were practical and meaningful to improve cardiac imaging and respiratory imaging .

简要介绍了直接数字合成（DDS）技术的发展及原理。

This paper briefly deals with the development and theory of direct digital synthesis technology .

介绍了一种基于DDS（直接数字合成）技术的频率合成器。

Direct Digital Synthesis ( DDS ) is an up-to-date technology for generating frequency signal .

DDS是一种数字合成技术。

DDS is digital synthesizer technique .

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）。

MMW high resolution radar range profile two-step stretch processing method direct digital synthesis ( DDS ) .

介绍利用复杂可编程逻辑器件（CPLD）和直接数字合成专用电路DDS，设计雷达信号回波模拟器的硬件系统。

Introduce how to design hardware system structure of radar signal echo simulator by using CPLD and DDS .

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.

数字合成全息系统中空间光调制器DMD的研究

Research of the DMD in a Digital Synthetic Holography System

本文介绍了直接数字合成（DDS）技术在激光相位测距仪中的应用。

This paper introduces the application of direct digital synthesizers ( DDS ) technique in laser phase distance measurement .

直接数字合成技术（DDS）随着专用芯片的大量出现而得到广泛的应用。

With the appearance of DDS ASIC , Direct Digital Synthesis ( DDS ) technology is wide ranging applied .

利用直接数字合成（DDS）技术完成对数据的调制。

And while programmed on DSP , we modulated data by the way of Direct Digital Synthesizer ( DDS ) .

介绍了直接数字合成技术（DDS）的工作原理，分析了结构组成、特点和影响其性能的主要参数；

In this paper we firstly introduce the concept , architecture , features and key parameters of the Direct Digital Synthesizer .

文章介绍了一种基于直接数字合成（DDS）技术，利用CPLD芯片和其它外围电路生成测试设备所需的雷达视频模拟信号和其它信号的硬件实现方案并给出部分仿真结果。

The realization technique of video signals by CPLD based on DDS is introduced , which is used to testing some radars .

基于CORDIC算法的线性调频直接数字合成实现

A CORDIC-Based LFM Implementation in Direct Digital Synthesizing

一种基于数字合成的DCG真彩色反射全息图的制作方法

The true color reflective hologram on DCG material based on the digital stereogram technology

数字合成孔径雷达中改善I/Q通道不平衡性的多相Kaiser滤波法

Polyphase Kaiser Filter for the Correction of I / Q Imbalance of Digital Synthetic Aperture Radar

介绍一种基于直接数字合成（Directdigitalsynthesis，DDS）技术的雷达信号回波模拟器的信号仿真及硬件实现方案。

The realization technique of a radar signal simulator based on DDS ( direct digital synthesis ) is introduced in this paper . The content covers the radar signal simulation and the simulator hardware configuration .

本文选取了DDS直接数字合成技术实现多通道严格同步的高速正弦波的产生，并进行峰峰值、基准值PID控制。

This paper selects direct digital synthesis technology ( DDS ) to generate multi-channel high speed sine with strictly synchronous and control by amplitude PID reference value PID .

采用直接数字合成（DDS）技术产生高精度激励信号源，用相敏解调方法实现数据获取。

Based on the DDS technique , the exciting signal source has high accuracy , and the data can be acquired by phase-sensibility demodulation .

设计并实现了基于直接数字合成技术（DDS）的SAR系统点目标回波模拟源，该模拟源主要包括ARM控制单元和DDS线性调频信号源两个部分。

SAR point target echo simulator which based on DDS chirp signal generator is introduced ; it is composed of ARM controller unit and LFM signal generator unit .

第三部分简要阐述了本文中涉及到的RF无线通信的一些基本原理，包括无线通信系统的频率调制解调、锁相环原理、直接数字合成原理（DDS）、以及DDS+PLL技术等各个部分。

The third part introduce the RF wireless communicated theory . Included the modulation and demodulation of the wireless system , the theory of PLL and DSS .

利用超外差式接收和直接数字合成（DDS）技术设计了高频地波雷达频谱监测系统的前端电路。

The design of a frontend circuit in the shortwave noise spectrum monitoring system is made by utilizing superheterodyne reception and direct digtal synthesis techniques .

着重分析采用直接数字合成（DDS）技术产生任意频率时钟信号的方法，实现数据发生器以任意码率输出数据；

Direct Digital Synthesize ( DDS ) is used to generate clock signal at any frequency so that data generator can output data at any rate .

本文介绍了一种应用CORDIC算法的线性调频直接数字合成（DDS）的实现方法。

A new method LFM in direct digital frequency synthesizing ( DDS ) based on CORDIC algorithm is introduced in this paper .

第一部分是第一章，介绍直接数字合成（DDS）技术的概念及研究意义，叙述目前国内外的技术水平，简要介绍课题研究的主要内容。

In first part we introduce the concept of Direct Digital Synthesize ( DDS ), describe the current level of this technique in the domestic and international .