A Resolution-Adaptive 8 mm\(^\text{2}\) 9.98 Gb/s 39.7 pJ/b 32-Antenna All-Digital Spatial Equalizer for mmWave Massive MU-MIMO in 65nm CMOS

All-digital millimeter-wave (mmWave) massive multi-user multiple-input multiple-output (MU-MIMO) receivers enable extreme data rates but require high power consumption. In order to reduce power consumption, this paper presents the first resolution-adaptive all-digital receiver ASIC that is able to a...

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Bibliographic Details
Published inarXiv.org
Main Authors Castañeda, Oscar, Boynton, Zachariah, Seyed Hadi Mirfarshbafan, Huang, Shimin, Ye, Jamie C, Molnar, Alyosha, Studer, Christoph
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 23.07.2021
Subjects
Analog to digital conversion
Analog to digital converters
Antennas
Application specific integrated circuits
CMOS
Millimeter waves
Power consumption
Receivers & amplifiers
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Summary:All-digital millimeter-wave (mmWave) massive multi-user multiple-input multiple-output (MU-MIMO) receivers enable extreme data rates but require high power consumption. In order to reduce power consumption, this paper presents the first resolution-adaptive all-digital receiver ASIC that is able to adjust the resolution of the data-converters and baseband-processing engine to the instantaneous communication scenario. The scalable 32-antenna, 65 nm CMOS receiver occupies a total area of 8 mm\(^\text{2}\) and integrates analog-to-digital converters (ADCs) with programmable gain and resolution, beamspace channel estimation, and a resolution-adaptive processing-in-memory spatial equalizer. With 6-bit ADC samples and a 4-bit spatial equalizer, our ASIC achieves a throughput of 9.98 Gb/s while being at least 2x more energy-efficient than state-of-the-art designs.
ISSN:2331-8422