摘要
本文介绍了直接数字频率合成器(DDFS:Direct Digital Frequency Synthesizer)的基本工作原理、主要误差源及改善方法,在此基础上着重讨论了压缩数据以等效增加数据容量的Sunderland算法,并提出了一种改进的数据分割方法,可以在杂散和ROM容量之间取得一个最优值,Matlab仿真结果验证了这一点。
This paper introduced the mechanism of DDFS （Direct Digital Frequency Synthesizer）. Based on the analysis of noise sources and the solutions to improve noise, we discussed the Sunderland algorithm which can compress data to enlarge ROMs. An improved data division method of Sunderland algorithm was proposed, which can get a better SFDR when using minimum ROMs and the result is proved via Matlab simulations.
出处
《微计算机信息》
2009年第12期250-251,276,共3页
Control & Automation
