Digital estimation and compensation of analog errors in frequency-interleaved ADCs

Jinpeng Song*, Shulin Tian, Yu Hen Hu, Peng Ye, Kuojun Yang, Lianping Guo, Wentao Wei

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

6 引用 (Scopus)

摘要

A novel digital compensation scheme for measuring, estimating and correcting linear weakly time-varying analog errors in frequency-interleaved analog-to-digital converters (FI-ADCs) is presented. This method features three important improvements over existing approaches: First, the Wigner-Ville distribution (WVD) is used to better estimate the nonstationary analog channel frequency response (ACFR) spectrum. Secondly, the estimated ACFR spectrum is approximated with a rational polynomial model using the l1-norm metric. The corresponding l1-norm minimization problem is solved using a primal-relaxed dual global optimization (PRD-GOP) method. Thirdly, the digital compensation circuitry is designed utilizing a preconditioned biconjugate gradient stabilized (BICGSTAB) algorithm that yields a computationally efficient solution. Numerical experimentations have been conducted and the outcomes validate the feasibility and superior performance of this proposed method.

源语言英语
文章编号1950134
期刊Journal of Circuits, Systems and Computers
28
8
DOI
出版状态已出版 - 1 7月 2019
已对外发布

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Song, J., Tian, S., Hu, Y. H., Ye, P., Yang, K., Guo, L., & Wei, W. (2019). Digital estimation and compensation of analog errors in frequency-interleaved ADCs. Journal of Circuits, Systems and Computers, 28(8), 文章 1950134. https://doi.org/10.1142/S0218126619501342