Pseudo-Random Quantization Based Two-Stage Detection in One-Bit Massive MIMO Systems

Gökhan Yılmaz (Corresponding author), Ali Özgür Yılmaz

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Samenvatting

Utilizing low-resolution analog-to-digital converters (ADCs) in uplink massive multiple-input multiple-output (MIMO) systems is a practical solution to decrease power consumption. The performance gap between the low and high-resolution systems is small at low signal-to-noise ratio (SNR) regimes. However, at high SNR and with high modulation orders, the achievable rate saturates after a finite SNR value due to the stochastic resonance (SR) phenomenon. This paper proposes a novel pseudo-random quantization (PRQ) scheme by modifying the quantization thresholds that can help compensate for the effects of SR and makes communication with high-order modulation schemes such as $1024$-QAM in one-bit quantized uplink massive MIMO systems possible. Moreover, modified linear detectors for non-zero threshold quantization are derived, and a two-stage uplink detector for single-carrier (SC) multi-user systems is proposed. The first stage is an iterative method called Boxed Newton Detector (BND) that utilizes Newton's Method to maximize the log-likelihood with box constraints. The second stage, Nearest Codeword Detector (NCD), exploits the first stage solution and creates a small set of most likely candidates based on sign constraints to increase detection performance. The proposed two-stage method with PRQ outperforms the state-of-the-art detectors from the literature with comparable complexity while supporting high-order modulation schemes.
Originele taal-2Engels
Artikelnummer10266983
Pagina's (van-tot)4397-4410
Aantal pagina's14
TijdschriftIEEE Transactions on Wireless Communications
Volume23
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - 1 mei 2024

Financiering

The work of G. Yılmaz was supported by Vodafone Turkey within the framework of 5G and Beyond Joint Graduate Support Program coordinated by the Information and Communication Technologies Authority of Turkey.

FinanciersFinanciernummer
Vodafone Turkey

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