直接数字波形合成中的镜频干扰分析  

On The Mirror Image Interference in Direct Digital Waveform Synthesis

作　　者：姒强[1] 向敬成[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子与信息学报》2004年第11期1766-1770,共5页Journal of Electronics & Information Technology

摘　　要：该文针对数字波形合成信号中的镜频干扰问题展开讨论,着重分析了镜频的形成机理及分布特点,说明了采样率对镜频干扰的影响,在此基础上定量分析了产生镜频干扰的采样率条件,并通过实验结果验证,该分析结果为数字波形合成中的采样率选取提供了新的理论依据。This paper discusses the mirror image interference in direct digital waveform synthesis. The formation and distribution characteristics of mirror images are illuminated, and the impact of sampling rate which brings mirror image interference is analyzed. Based on these, the condition of sampling rate which results in mirror image interference is concluded and proved by experiment. The conclusion provides new theoretical basis on sampling rate selection in digital waveform synthesis.

关 键 词：直接数字波形合成 采样率 镜频 

分 类 号：TN74[电子电信—电路与系统]