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A novel design approach for ROM-less direct digital frequency synthesizers based on polynomial approximations

机译:一种基于多项式逼近的无ROM直接数字频率合成器的新颖设计方法

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摘要

A new design principle of the ROM-less direct digital frequency synthesizer (DDFS) based on the polynomial approximation is proposed, where the spurious free dynamic range (SFDR) is used as a design criterion for the polynomial coefficients. The optimal SFDR is pursued, and is transformed into a Chebyshev minimax problem with constraints. Numerical examples are presented to illustrated the SFDR evaluations.
机译:提出了一种基于多项式近似的无ROM直接数字频率合成器(DDFS)的新设计原理,其中无杂散动态范围(SFDR)被用作多项式系数的设计准则。追求最佳SFDR,并将其转换为具有约束的切比雪夫极小值问题。给出了数值示例来说明SFDR评估。

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