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引用本文：

何善亮,马骁,田浩,等.一种基于二次项逼近的DDS算法及其实现[J].电讯技术，2012，52（12）： - . [点击复制]
HE Shan-liang,MA Xiao,TIAN Hao,et al.Design and implementation of a DDS algorithm based on quadratic approximation[J].，2012，52（12）： - . [点击复制]

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一种基于二次项逼近的DDS算法及其实现
何善亮,马骁,田浩,杨洪强
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(成都国腾电子技术股份有限公司，成都 610041)

摘要:

阐述了直接数字合成器（DDS）的基本原理，分析了现有DDS算法的优缺点，设计出基于二次项逼近的DDS算法,并给出该算法的电路实现。最后通过该算法的仿真分析表明，该算法实现的DDS其无杂散动态范围(SFDR)高达-105 dBc，且占用较少的资源，满足雷达、信号源等系统对高性能、低功耗的设计要求。

关键词: DDS算法二次项逼近 SFDR 高性能低功耗

DOI：

基金项目:

Design and implementation of a DDS algorithm based on quadratic approximation

HE Shan-liang,MA Xiao,TIAN Hao,YANG Hong-qiang

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Abstract:

This paper describes the theory of DDS（Direct Digital Synthesizer), analyses th e advantages and disadvantage of the existing DDS algorithms, then designs a DDS algorithm based on quadratic approximation and implements its circuit. Simulati on result shows that the SFDR（Spurious Free Dynamic Range） of the DDS realized by proposed algorithm is up to -105 dBc and fewer resources are consumed. It me ets the high-performance and low power consumption requirements of radar and si gnal source.

Key words: DDS algorithm quadratic approximation SFDR high performance low power consumption