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A 39pJ/b 7.3Gbps 1.3mm2 Multi-Subcarrier Massive MU-MIMO-OFDM Detector Exploiting Beamspace Sparsity and Frequency-Domain Correlation in 22FDX

Abhishek Kumar, Seyed Hadi Mirfarshbafan

2025enmimoofdm5gcommunicationenergy efficiency

Abstract

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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.

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Cite This Work

@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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