Fig. 11: Average SE per user performance comparison between MRT, Bessel, Padé–Bessel, and RZF for limited hardware resolution.
From: Volumetric beam focusing: a new paradigm in extreme MIMO

a Conditioning number of precoding matrix for Nt = {380, 420, 460} and M = 200. b SE performance for varying DAC/ADC resolution with Nt = 380 and M = 200.