  We consider a wideband integrated access and backhaul system operating in
full-duplex mode between the New Radio gNB donor and single user equipment. Due
to high power consumption in millimeter wave systems, we use low-resolution
analog-to-digital converters (ADCs) in the receivers. Our contributions include
(1) hybrid beamformer to maximize sum spectral efficiency of the access and
backhaul links by canceling self-interference and maximizing received power;
(2) all-digital beamformer and upper bound on sum spectral efficiency; and (3)
simulations to compare full vs. half duplex, finite vs. infinite ADC
resolution, hybrid vs. all-digital beamforming, and the upper bound in spectral
efficiency.
