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arXiv · 1907.07091

Massive MU-MIMO-OFDM Uplink with Direct RF-Sampling and 1-Bit ADCs

Sven Jacobsson·Lise Aabel·Mikael Coldrey·Ibrahim Can Sezgin·Christian Fager·Giuseppe Durisi·Christoph Studer
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Abstract

Advances in analog-to-digital converter (ADC) technology have opened up the possibility to directly digitize wideband radio frequency (RF) signals, avoiding the need for analog down-conversion. In this work, we consider an orthogonal frequency-division multiplexing (OFDM)-based massive multi-user (MU) multiple-input multiple-output (MIMO) uplink system that relies on direct RF-sampling at the base station and digitizes the received RF signals with 1-bit ADCs. Using Bussgang's theorem, we provide an analytical expression for the error-vector magnitude (EVM) achieved by digital down-conversion and zero-forcing combining. Our results demonstrate that direct RF-sampling 1-bit ADCs enables low EVM and supports high-order constellations in the massive MU-MIMO-OFDM uplink.

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Sven Jacobsson, Lise Aabel, Mikael Coldrey, Ibrahim Can Sezgin, Christian Fager, Giuseppe Durisi, Christoph Studer. 2019-07-16. Massive MU-MIMO-OFDM Uplink with Direct RF-Sampling and 1-Bit ADCs. https://arxiv.org/abs/1907.07091

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