Real-Time Demonstration of a Frequency-Division Duplex 122Mbps Spread-Spectrum MIMO RFSoC Link

We design and implement a new multiple-input multiple-output (MIMO) frequency-division-duplex (FDD) spread-spectrum link and demonstrate real-time high-definition (HD) video streaming over a Radio Frequency System-on-a-Chip (RFSoC) software-radio testbed. To the best of our knowledge, this is the first-of-its-kind high-throughput low-latency full-duplex spread-spectrum link on RFSoC platforms which demonstrates an aggregated data throughput of 122 Mbps that supports real-time recording and playback of uncompressed full-HD video. The testbed comprises two Xilinx Zynq Ultrascale+ RFSoC ZCU111 evaluation kits with a custom-built application layer. A host-based graphical user interface (GUI) demonstrates live performance of the proposed 4×4 MIMO wireless link in terms of error vector magnitudepre-detection SINR and bit error rate (BER) and enables on-the-fly reconfiguration of link parameters such as spreading code sequence, transmit/receive antenna gains.