SC22 Proceedings

The International Conference for High Performance Computing, Networking, Storage, and Analysis

Research Posters Archive

Low-Precision Multi-GPU Detection Approach for Massive MIMO Technology

Authors: Adel Dabah and Hatem Ltaief (King Abdullah University of Science and Technology (KAUST)); Zouheir Rezki (University of California, Santa Cruz); and Slim Alouini and David Keyes (King Abdullah University of Science and Technology (KAUST))

Abstract: Massive Multiple-Input-Multiple-Output is a crucial technology for Next-Generation networks (Next-G). It uses hundreds of antennas at transceivers to exchange data. However, its accurate signal detection relies on solving an NP-hard optimization problem in real-time latency.

In this poster, we propose a new GPU-based detection algorithm that demonstrates the positive impact of low-precision arithmetic with multiple GPUs to achieve next-G latency/scalability/accuracy requirements. Our approach iteratively extends a solution with several symbols representing the best combination out of the aggregated levels. The computation at each iteration is formulated as a matrix multiplication operation to leverage GPU architectures.

The obtained results using A100 GPU show a 1.7x improvement by exploiting half-precision arithmetic without loss in accuracy. Furthermore, our low-precision multi-GPU version with four A100 GPUs is 4x faster than the single-precision single GPU version and 40x faster than a similar parallel CPU implementation executed on a two-socket 28-core IceLake CPU with 56 threads.

Best Poster Finalist (BP): no

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