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影响DDS输出Chirp信号频谱的主要参数分析
Alternative TitleAn Analys is of Major Parameters Affecting theSpectral of DDS D ig ital Chirp
阎敬业; 姜景山; 张云华; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication遥感技术与应用
2005
Volume20Issue:1Pages:182-188
ISSN1004-0323
Language中文
Keyword直接数字合成(Dds) 数字线性调频信号(Chirp) 波形存储 正交合成 误差分析
Abstract简单介绍了直接数字合成(DDS)技术的基本原理和两种主要的实现方式,并比较了相位累加和波形存储两种实现方式的优缺点.通过MATLAB/SIMULINK仿真,定量化分析了波形存储方式影响DDS输出中频Chirp信号质量的主要指标,其中包括DDS采样频率与输出信号带宽的比值.数据精度与模数转换器(DAC)精度、低通滤波器与正交合成器的各项指标.仿真结果表明,DDS模块中各单元技术指标的性能变化均能对输出信号的频谱产生影响.在对各种主要参数进行充分分析的基础上,最后提出了波形存储式DDS的优化设计策略.
Other AbstractThis paper analyzes some major parameters affect ing the perfo rmance of digital Chirp implemen ted by wavefo rmsto rage DDS app roach.At the same time,compares the advan tages and disadvan tages betw een the w avefo rm 2sto rage DDS app roach and ano ther DDS app roach of phase accumu lat ion.Compu ter simu lat ion s w ith MA TLAB/S IIMUL IN K show that, samp ling frequency,resolution of the Digital-to-analog-converter,low pass f ilter and I/Q modu lato r affect the output Chirp spect rum in differen taspects.The developed sof tw are based on MA TLABS IIMUL/INK can p rovide an analyzing, design and optimization platform for DDS digital chirp.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/2025
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
阎敬业,姜景山,张云华,等. 影响DDS输出Chirp信号频谱的主要参数分析[J]. 遥感技术与应用,2005,20(1):182-188.
APA 阎敬业,姜景山,张云华,&北京8701信箱.(2005).影响DDS输出Chirp信号频谱的主要参数分析.遥感技术与应用,20(1),182-188.
MLA 阎敬业,et al."影响DDS输出Chirp信号频谱的主要参数分析".遥感技术与应用 20.1(2005):182-188.
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