Abhishek Kumar, Seyed Hadi Mirfarshbafan
We present the first multi-subcarrier massive multi-user (MU) multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) data detector reported in the open literature. By exploiting the channel’s beamspace sparsity and frequency-domain correlation, we achieve up to 3× area and power reduction. Our design supports U = 8 user equipments and B = 64 basestation antennas, computes soft outputs for QPSK to 256-QAM, and processes 16 subcarriers in parallel. The fabricated 22FDX ASIC has a core cell area of 1.3mm2, consumes 286mW, and delivers a throughput of 7.3Gbps at 0.8V core voltage, achieving best-in-class energy efficiency of 39pJ/b.
@article{d5a3c78e-b2b7-43d2-a6df-814fa095d1d8,
title={A 39pJ/b 7.3Gbps 1.3mm2 Multi-Subcarrier Massive MU-MIMO-OFDM Detector Exploiting Beamspace Sparsity and Frequency-Domain Correlation in 22FDX},
author={Abhishek Kumar and Seyed Hadi Mirfarshbafan},
year={2025},
language={en}
}TY - JOUR TI - A 39pJ/b 7.3Gbps 1.3mm2 Multi-Subcarrier Massive MU-MIMO-OFDM Detector Exploiting Beamspace Sparsity and Frequency-Domain Correlation in 22FDX AU - Abhishek Kumar AU - Seyed Hadi Mirfarshbafan PY - 2025 LA - en ER -
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