摘要
依据直接数字式频率合成器(DDS)的基本工作原理,针对DDS中杂散与噪声的主要来源,综合分析了相位抖动法和延时叠加法的有效性,并运用MATLAB中的simulink建立了DDS仿真模型,通过对仿真结果的研究表明,只有选用合适的相位抖动注入,才能对DDS输出频谱中的杂散分量产生明显的抑制效果。
For the main sources of spurious and noise in DDS, phase dither and delay overlaping are analyzed based on the principle of DDS, the model of DDS in simulink of MATLAB is built. Simulation result shows that only adopting phase dither injection, the obvious effect on spurious reduction in DDS output frequency spectnma may be gained.
出处
《信息技术》
2006年第4期1-3,11,共4页
Information Technology
