Title :
Near maximum-likelihood detector with one-bit ADCs for multiuser massive MIMO systems
Author :
Junil Choi;Robert W. Heath
Author_Institution :
Wireless Networking and Communications Group, The University of Texas at Austin, United States
Abstract :
In massive multiple-input multiple-output (MIMO) systems, deploying a high-resolution analog-to-digital converter (ADC) for each antenna element may not be power and cost efficient. Assuming each antenna is connected to a pair of one-bit ADCs, i.e., one for each real and imaginary component of the received signal, a near maximum likelihood (nML) detector for uplink multiuser massive MIMO systems is proposed in this paper. The proposed nML detector is based on a standard convex optimization technique and becomes optimal when the number of receive antennas at the base station goes to infinity. Simulation results show that the proposed nML detector can simultaneously support multiple users using higher-order constellations, e.g., 16 quadrature amplitude modulation, and performs much better than a simple zeroforcing (ZF)-type detector.
Keywords :
"Detectors","Base stations","MIMO","Receiving antennas","Uplink","Signal to noise ratio","Error analysis"
Conference_Titel :
Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2015 IEEE 6th International Workshop on
DOI :
10.1109/CAMSAP.2015.7383820