We introduce a novel direct calibration algorithm to address phase delay, gain, and offset mismatches in Analog-to-Digital Converter (ADC) time interleaving systems. These mismatches, common in high-speed data acquisition, degrade system performance and signal integrity, particularly in applications such as radio astronomy and very long baseline interferometry (VLBI). Our proposed algorithm uses a sinusoidal reference signal and Fourier analysis to isolate and correct each type of mismatch, providing a computationally efficient solution. Extensive numerical simulations validate the algorithm's effectiveness and demonstrate its ability to significantly enhance signal reconstruction accuracy compared to existing methods. This work provides a robust and scalable solution for maintaining signal fidelity in interleaved ADC systems and has broad applications in fields that require high-speed data acquisition.
@article{arxiv.2511.20763,
title = {A Direct Calibration Algorithm for ADC Interleaving},
author = {Chi-kwan Chan and Hina Suzuki and David Forbes and Andrew Thomas West and Arash Roshanineshat and Daniel P. Marrone and Amy Lowitz},
journal= {arXiv preprint arXiv:2511.20763},
year = {2025}
}