直接数字频率合成器相位截断杂散谱的精确分析
Precise Analysis of the Spurious Spectrum of DDS in the Presence of Phase Truncation
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摘要: 该文在Nicholas采用数论方法得到的相位截断杂散谱的幅度和位置分布结果的基础上,运用映射和数论工具对杂散谱位置分布进行了分析,提出了一种简化算法,可精确分析相位截断杂散谱的谱线幅度和杂散位置.Abstract: Based on the analysis of the spurious spectrum introduced by phase truncation which was made by Nicholas, the new simplified algorithm of spurious spectrum in the presence of phase truncation is presented by using the mapping mathematics and number theory. It is possible to precisely analyze the spurious spectrum location and the spurious amplitude introduced by phase truncation in practical applications.
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Tierney J, Rader C M, Gold B. A digital frequency synthesizer. IEEE Trans. on Audio and Electroacoustics, 1971, AU-19(3): 48-57.[2]王利兴等.DDS在正交调制技术中的应用.电子技术应用,2002,28(3):48-49.[3]安建平,金松.DDS在相控阵雷达系统中的应用.现代雷达,2000,22(2):78 82.[4]朱范德.直接数字频率合成技术在ADC系统中的应用.现代电子技术,2002,132(1):81-83.[5]Nicholas H T, Samueli H. An analysis of the output spectrum of direct digital frequency synthesizers in the presence of phase-accumulator truncation. In: 41st Annual Frequency Control Symposium, Monmouth, 1987: 495-502.[6]张玉兴,彭清泉.相位舍位对DDS谱分布的影响.电子科技大学学报,1997,28(4):137-142.[7]赵正敏.相位截尾对DDS输出谱影响的分析与计算.东南大学学报,2000,30(1):141-145. -
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