  Millimeter-wave (mmWave) massive multi-user multiple-input multiple-output
(MU-MIMO) technology promises unprecedentedly high data rates for
next-generation wireless systems. To be practically viable, mmWave massive
MU-MIMO basestations (BS) must (i) rely on low-resolution data-conversion and
(ii) be robust to jammer interference. This paper considers the problem of
mitigating the impact of a permanently transmitting jammer during uplink
transmission to a BS equipped with low-resolution analog-to-digital converters
(ADCs). To this end, we propose SNIPS, short for Soft-Nulling of Interferers
with Partitions in Space. SNIPS combines beam-slicing---a localized, analog
spatial transform that focuses the jammer energy onto a subset of all
ADCs---together with a soft-nulling data detector that exploits knowledge of
which ADCs are contaminated by jammer interference. Our numerical results show
that SNIPS is able to successfully serve 65% of the user equipments (UEs) for
scenarios in which a conventional antenna-domain soft-nulling data detector is
only able to serve 2% of the UEs.
