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A 0.58-mm2 2.76-Gb/s 79.8-pJ/b 256-QAM Message-Passing Detector for a 128 × 32 Massive MIMO Uplink System by Wei Tang; Chia-Hsiang Chen; Zhengya Zhang is a Engineering article available to read on EtoBox.

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Massive multiple-input-multiple-output (MIMO) detection uses a large number of antennas to increase spectral efficiency at a cost of large computation resources and power in a base station. In this article, we demonstrate a 0.58-mm 2 128 × 32 (it denotes 128 base station antennas and 32 singleantenna users) 256-QAM massive MIMO uplink detector based on message-passing detection (MPD). With the proposed symbol hardening processing, the complexity is reduced by more than 60% compared to the direct implementation of MPD. The detector implements a grouped layer-parallel architecture to accelerate convergence, enabling an average throughput of 2.76 Gb/s (running, on average, 4.92 iterations with early termination) at 221 mW. The chip incorporates adaptive precision control and clock gating to improve energy efficiency further by up to 43%.

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Author

Wei Tang; Chia-Hsiang Chen; Zhengya Zhang

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)