Ultra-wideband SDR architecture for AMD RFSoCs and PYNQ based GNU Radio blocks

Šiaučiulis, Marius and Crockett, Louise H. and Stewart, Robert W. (2023) Ultra-wideband SDR architecture for AMD RFSoCs and PYNQ based GNU Radio blocks. Proceedings of the GNU Radio Conference, 8 (1). pp. 1-8. (https://pubs.gnuradio.org/index.php/grcon/article/...)

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The AMD RFSoC (Radio Frequency System on Chip) architecture has gained significant attention within the Software Defined Radio (SDR) community for its integration of Radio Frequency (RF) frontend, FPGA fabric and Linux-capable Arm-based processing system in a single package. Despite its accessibility to researchers via the RFSoC 2x2 and RFSoC 4x2 development board platforms, its adoption within the GNU Radio community has been limited. This work demonstrates the potential of combining RFSoC with GNU Radio by utilizing a bidirectional QSFP network link to transmit and receive a wideband Orthogonal Frequency-Division Multiplexing (OFDM) signal. Using the remote procedure calls we are able to control the Tx/Rx center frequency and RFSoCs Digital Up/Down Converter (DUC/DDC) rates from the host PC to achieve runtime configurable bandwidth. Additional signal inspection and visualisation is implemented using existing GNU Radio GUI widgets and analysis blocks.