摘要
提出了一种高速模数转换器频域特性评估新方法,即采用非相干采样方式,在标准快速离散傅里叶变换的基础上增加加窗和插值措施,从而显著减少了频谱泄漏,提高了评估精度,最大限度地降低了评估系统构建难度和成本.采用实际高速模数转换器的行为级动态模型和计算机仿真验证了所提方法的有效性.
A new evaluation method is proposed to analyze the frequency-domain characteristics of high-speed analog to digital converter （ADC）. The new method uses incoherent sampling, and adopts the window-added and interpolated measurements based on the standard fast discrete Fourier transform to reduce spectral leakage and to improve evaluation precision, and can reduce as greatly as possible the difficulties and cost in constructing the evaluation system. The behavioral dynamic model of actual high-speed ADC is employed and computer simulation is made to validate the effectiveness of the presented method.
出处
《信息与控制》
CSCD
北大核心
2009年第1期43-48,54,共7页
Information and Control
基金
国家自然科学基金资助项目(60776834).
关键词
高速模数转换器
加窗和插值FFT
相干采样
非相干采样
high-speed analog to digital converter （ADC）
window-added and interpolated FFT
coherent sampling
incoherent sampling
