AMD GPU-based Selected Acceleration of PRACH and PUSCH in 5G NR

The software-defined physical layer is a recent trend in the 5G/B5G open radio access network. Most implementations are based on a central processing unit, i.e., Intel XEON and ARM. This work proposes an uplink acceleration on an AMD graphics processor unit and OpenCL to show a new opportunity in 5th Generation New Radio HIGH-PHY. The key accelerators are the physical random access channel and the physical uplink shared channel under a real-time test environment. Referring to 5G NR, we balance and match slot formats and GPU resources to ensure the PHY works properly on the AMD MI.50 with fine-tuned parallelism and memory mapping. This work suggests that the AMD GPU is suitable for 5G ORAN.