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Digital beamforming (DBF) for ultra‐wideband (UWB) signals plays a key role in many applications, and high spatial resolution and accurate digital delay of UWB signals are the focus of UWB DBF research. In this paper, we propose a novel DBF method utilizing an extrapolated array generated by Carathéodory representation combining fractional delay filters (FDFs) based on high‐order Hermite interpolation...
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