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

机译:一种基于多项式近似的ROM的直接数字频率合成器的新型设计方法

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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较少的直接数字频率合成器(DDFS)的新设计原理,其中杂散的自由动态范围(SFDR)用作多项式系数的设计标准。追求最佳的SFDR,并通过约束转换为Chebyshev Minimax问题。提出了数值例子以说明了SFDR评估。

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