A Direct Calibration Algorithm for ADC Interleaving

Fuente: arXiv
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Autori principali: Chan, Chi-kwan, Suzuki, Hina, Forbes, David, West, Andrew Thomas, Roshanineshat, Arash, Marrone, Daniel P., Lowitz, Amy
Natura: Preprint
Pubblicazione: 2025
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author Chan, Chi-kwan
Suzuki, Hina
Forbes, David
West, Andrew Thomas
Roshanineshat, Arash
Marrone, Daniel P.
Lowitz, Amy
author_facet Chan, Chi-kwan
Suzuki, Hina
Forbes, David
West, Andrew Thomas
Roshanineshat, Arash
Marrone, Daniel P.
Lowitz, Amy
contents 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.
format Preprint
id arxiv_https___arxiv_org_abs_2511_20763
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle A Direct Calibration Algorithm for ADC Interleaving
Chan, Chi-kwan
Suzuki, Hina
Forbes, David
West, Andrew Thomas
Roshanineshat, Arash
Marrone, Daniel P.
Lowitz, Amy
Instrumentation and Methods for Astrophysics
Signal Processing
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.
title A Direct Calibration Algorithm for ADC Interleaving
topic Instrumentation and Methods for Astrophysics
Signal Processing
url https://arxiv.org/abs/2511.20763