直接數(shù)字頻率合成器相位截斷雜散譜的精確分析
Precise Analysis of the Spurious Spectrum of DDS in the Presence of Phase Truncation
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摘要: 該文在Nicholas采用數(shù)論方法得到的相位截斷雜散譜的幅度和位置分布結(jié)果的基礎(chǔ)上,運用映射和數(shù)論工具對雜散譜位置分布進行了分析,提出了一種簡化算法,可精確分析相位截斷雜散譜的譜線幅度和雜散位置.
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關(guān)鍵詞:
- 直接數(shù)字頻率合成; 相位截斷; 雜散; 映射
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. -
Tierney J, Rader C M, Gold B. A digital frequency synthesizer. IEEE Trans. on Audio and Electroacoustics, 1971, AU-19(3): 48-57.[2]王利興等.DDS在正交調(diào)制技術(shù)中的應(yīng)用.電子技術(shù)應(yīng)用,2002,28(3):48-49.[3]安建平,金松.DDS在相控陣雷達系統(tǒng)中的應(yīng)用.現(xiàn)代雷達,2000,22(2):78 82.[4]朱范德.直接數(shù)字頻率合成技術(shù)在ADC系統(tǒng)中的應(yīng)用.現(xiàn)代電子技術(shù),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]張玉興,彭清泉.相位舍位對DDS譜分布的影響.電子科技大學(xué)學(xué)報,1997,28(4):137-142.[7]趙正敏.相位截尾對DDS輸出譜影響的分析與計算.東南大學(xué)學(xué)報,2000,30(1):141-145. -
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