摘要
为提高并行交替式ADC系统分辨力,提出一种将模周期T运算重排序图方法和偏置抖动方法相结合的新方法.根据存在偏置抖动时,使用模周期T运算重排序图方法后输出信号的频谱特点,采用低通滤波方法来提高系统的分辨力.利用输入信号频率与采样频率互为质数的特点,可使并行交替式ADC系统对直流和奈奎斯特频率的输入信号幅度分辨力都能提高.计算机仿真结果证明了本算法运算量小,易于实现.
A new approach, which combine module time plot with offset dither, is proposed to enhance the resolution of time-interleaved ADC system. According to the characteristics of output signal spectra with offset dither, the resolution of time-interleaved ADC to the input signal with a frequency range from DC to Nyquist frequency can be improved by using low pass filters. Computer simulation proved the validity and feasibility of the method proposed.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2003年第8期935-938,共4页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(69872011).
