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arXiv · 2210.07821

Receiver Bandwidth Extension Beyond Nyquist Using Channel Bonding

Sebastian Giehl·Carsten Andrich·Michael Schubert·Maximilian Engelhardt·Alexander Ihlow
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Abstract

Current and upcoming communication and sensing technologies require ever larger bandwidths. Channel bonding can be utilized to extend a receiver's instantaneous bandwidth beyond a single converter's Nyquist limit. Two potential joint front-end and converter design approaches are theoretically introduced, realized and evaluated in this paper. The Xilinx RFSoC platform with its 5 GSa/s analog to digital converters (ADCs) is used to implement both a hybrid coupler based in-phase/quadrature (I/Q) sampling and a time-interleaved sampling approach along with channel bonding. Both realizations are demonstrated to be able to reconstruct instantaneous bandwidths of 5 GHz with up to 49 dB image rejection ratio (IRR) typically within 4 to 8 dB the front-ends' theoretical limits.

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Sebastian Giehl, Carsten Andrich, Michael Schubert, Maximilian Engelhardt, Alexander Ihlow. 2022-10-14. Receiver Bandwidth Extension Beyond Nyquist Using Channel Bonding. https://doi.org/10.23919/eucap57121.2023.10133262

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