Signal distortion characterization and correction using pilot chirp pulse train for free-running clock synchronization

作者：Wonje Lee, Daniel P. Abraham, Shreyas Vasanawala, John M. Pauly, Scott Greig · 发表于：Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition · 年份：2025 · DOI：10.58530/2025/4241 · 研究领域：Advancements in PLL and VCO Technologies、Network Time Synchronization Technologies

Motivation: to investigate a pilot signal that emulates acquisition bandwidth for reliable frequency offset tracking and corrections of an asynchronous receiver. Goal(s): to achieve successful on-coil digitizer operation over a wireless MRI data link. Approach: by creating synchronous and asynchronous time series using two software-defined radios with pre-defined chirp pulse train and characterizing and correcting distortions on images. Results: Chirp pulse train can emulate image acquisition bandwidth and correct offsets, exhibiting non-coherent residual artifacts when unmixing. Impact: Pilot chirp can improve the usability of tracking and correcting offset distortions associated with asynchronous free-running receivers.