基于非均勻采樣模型的DDS相位截?cái)嚯s散譜分析
An Analysis of DDS Spurious Spectrum Based on Non-uniformly Sampled Model
-
摘要: 該文提出直接數(shù)字頻率合成器(DDS)的非均勻采樣模型，在此模型的基礎(chǔ)上對(duì)DDS的相位截?cái)囝l譜雜散進(jìn)行了分析和計(jì)算，給出了一些重要的結(jié)論并指出了影響雜散特性一種較為準(zhǔn)確的解釋。同時(shí)給出了一種抑制相位截?cái)嘣胍舻姆椒?。Matlab仿真結(jié)果表明在一定條件下該方法能夠有效抑制相位截?cái)嗾`差。
-
關(guān)鍵詞:
- 直接數(shù)字頻率合成器; 相位截?cái)? 雜散噪音; 非均勻采樣
Abstract: A non-uniformly sampled model to DDS is introduced, based on which an analysis of DDS phase truncation noise is deduced and some important conclusions including the explanation to this kind of spur noise are derived. Further more, a technique to restrain DDS spur noise is introduced. The Matlab simulation indicates that DDS spur noise can be effectively restrained using this technique under some restriction conditions. -
計(jì)量
- 文章訪問數(shù): 2492
- HTML全文瀏覽量: 122
- PDF下載量: 807
- 被引次數(shù): 0
下載:
