數(shù)系中具有噪聲保護(hù)的解模糊問(wèn)題
THE SOLUTION TO AN AMBIGUITY PROBLEM WITH NOISE PROTECTION IN NUMBER SYSTEM
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摘要: 本文介紹了DFT與對(duì)稱(chēng)/非對(duì)稱(chēng)數(shù)系(SNS/ANS)之間的關(guān)系,并討論了噪聲對(duì)數(shù)系中解模糊的影響。把ANS中對(duì)噪聲不敏感的解模糊原理推廣到SNS系統(tǒng)中,給出了具有噪聲保護(hù)的SNS無(wú)模糊帶寬公式,在此基礎(chǔ)上提出了欠采樣條件下對(duì)噪聲不敏感的SNS實(shí)時(shí)頻率解模糊算法。
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關(guān)鍵詞:
- 無(wú)模糊帶寬; 欠采樣; 余數(shù)誤差
Abstract: The relationship between the discrete Fourier transform (DFT) and the symmetrical/Asymmetrical number system (SNS/ANS) is introduced in this paper. And the influence of noise upon the solution to an ambiguity problem in number system is also discussed. The principle of noise insensitive solution to the ambiguity in ANS is extended to SNS. The unambiguous bandwidth equation with noise protection in SNS is presented,based on which a real time noise insensitive algorithm in SNS for resolving undersampling ambiguous frequency is proposed. -
[美] 詹姆斯崔保延:寬帶接收機(jī)數(shù)字技術(shù).電子工業(yè)部第二十九研究所情報(bào)室,《電子戰(zhàn)技術(shù)文選》編輯部,1996, 7.[2]Sanderson R B, et al., Reduction of aliasing ambiguities througth phase relations. IEEE Tans. on AES, 1992, AES-28(4), 950-955.[3]McCormick W S, et al., A noise insensitive solution to an ambiguity problem in spectral estima-[4]tion. IEEE Trans. on AES 1989, AES-25(5), 729-732.[5]Phillip E P, et al., Use of the symmetrical number system in resolving single-frequency under-[6]sampling aliases. IEEE Tans. on SP 1997, SP-45(5), 1153-1160.[7]文宇.空間信號(hào)瞬時(shí)測(cè)頻技術(shù)研究:[碩士論文].電子科技大學(xué)電子工程學(xué)院,1997, 1. -
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