Séminaire ICI : A. Lee Swindlehurst
Titre du séminaire et orateur
Mixed-ADC Massive MIMO
A. Lee Swindlehurst, Professor, University of California Irvine, CA, USA
Date et lieu
Lundi 10 juillet 2017, 10h.
ENSEA, Cergy Pontoise, salle 384.
Implementing MIMO systems with cheap and low-power one-bit analog-to-digital converters (ADCs) is a promising approach that can alleviate the power consumption burden at the base station. However, this approach suffers from substantial channel estimation error caused by the coarse quantization which results in spectral efficiency (SE) loss. In this talk, we investigate the effectiveness of "mixed-ADC" architectures to overcome this issue. In particular, we study to what extent one can combat the SE loss by exploiting just N ≪ M pairs of high-resolution ADCs, where M denotes the number of BS antennas. Analytical results are presented that show the impact of the mixed-ADCs on channel estimation accuracy and in turn on SE for maximum ratio combining and zero-forcing detection in the low and high signal-to-noise ratio regime.