Estimation of channel delay in analog-to-information converters

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Abstract

Analog-to-Information Converter (AIC) is the physical implementation of Compressed Sensing (CS) systems to digitize signals directly from the analog domain. Due to non-idealities of components AIC hardware needs a calibration step to adjust parameters before its utilization. In this paper, we consider a theoretical linear model of an AIC architecture composed by parallel channels that suffers from synchronization problems between the input signal and the internal signals used to perform the measurement. Using a radar inspired technique we propose a method to estimate the delay between these signals. Obtained results show the accuracy of the proposed method and its potential to be used in AIC calibration techniques.

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Arruda, B. W. S., Gurjao, E. C., Torres, L. F. N. M., Reist, V. L., & Freire, R. C. S. (2019). Estimation of channel delay in analog-to-information converters. In Proceedings - IEEE International Symposium on Circuits and Systems (Vol. 2019-May). Institute of Electrical and Electronics Engineers Inc. https://doi.org/10.1109/ISCAS.2019.8702737

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