| 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： |
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| 基金项目: |
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| Design and implementation of a DDS algorithm based on quadratic approximation |
| HE Shan-liang,MA Xiao,TIAN Hao,YANG Hong-qiang |
| () |
| 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 |
