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本文介绍了DFT与对称/非对称数系(SNS/ANS)之间的关系,并讨论了噪声对数系中解模糊的影响。把ANS中对噪声不敏感的解模糊原理推广到SNS系统中,给出了具有噪声保护的SNS无模糊带宽公式,在此基础上提出了欠采样条件下对噪声不敏感的SNS实时频率解模糊算法。
This article describes the relationship between DFT and SNS / ANS and discusses the effect of blurring on the noise logarithmic system. The noise-insensitive anti-fuzzy principle in ANS is extended to SNS system, and the SNS fuzzy bandwidth formula with noise protection is given. Based on this, the noise-insensitive SNS real-time frequency solution is proposed under the condition of under-sampling algorithm.