时间交叉模数转换系统的时间失配补偿  

Compensate Time Mismatch of Time-Interleaved ADC Systems

作　　者：尹亮[1] 周劼[1] 姚军[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《信息与电子工程》2007年第4期241-244,共4页information and electronic engineering

摘　　要：时间交叉模数转换结构是提高模数转换系统采样率的一种有效途径。由于制造工艺的局限和布线的差异,这种结构会引入通道失配而限制系统的性能。通道失配包括偏置失配、增益失配和时间失配。文中提出了一种基于快速傅里叶变换(Fast Fourier Transform,FFT)计算时间失配并采用有限冲激响应(Finite Impusle Response,FIR)滤波器对它进行补偿的方法,并通过Matlab仿真验证了算法的有效性和可行性。Time-interleaved analog to digital conversion structure is an effective approach to increase the sampling rate of the analog to digital converter system. But because of the limitation of the manufacture technics and the differences of the layout, this structure causes channel mismatches which limit the performance of the system. Channel mismatches include offset mismatch, gain mismatch and time mismatch. In this paper, a method based on FFT to calculate the time mismatch and using FIR filter to compensate it is presented.Matlab simulation results prove the validity and feasibility of the algorithm.

关 键 词：时间交叉 模数转换 时间失配 FFT 

分 类 号：TN792[电子电信—电路与系统]