Millimeter-wave (mmWave) massive multi-user multiple-input multiple-output (MU-MIMO) promises unprecedented data rates for next-generation wireless systems. To be practically viable, mmWave massive MU-MIMO basestations (BSs) must rely on low-resolution data converters which leaves them vulnerable to jammer interference. This paper proposes beam-slicing, a method that mitigates the impact of a permanently transmitting jammer during uplink transmission for BSs equipped with low-resolution analog-to-digital converters (ADCs). Beam-slicing is a localized analog spatial transform that focuses the jammer energy onto few ADCs, so that the transmitted data can be recovered based on the outputs of the interference-free ADCs. We demonstrate the efficacy of beam-slicing in combination with two digital jammer-mitigating data detectors: SNIPS and CHOPS. Soft-Nulling of Interferers with Partitions in Space (SNIPS) combines beam-slicing with a soft-nulling data detector that exploits knowledge of the ADC contamination; projeCtion onto ortHOgonal complement with Partitions in Space (CHOPS) combines beam-slicing with a linear projection that removes all signal components co-linear to an estimate of the jammer channel. Our results show that beam-slicing enables SNIPS and CHOPS to successfully serve 65% of the user equipments (UEs) for scenarios in which their antenna-domain counterparts that lack beam-slicing are only able to serve 2% of the UEs.
翻译:mmWave 大型 MU-MIMO 基站必须依赖低分辨率数据转换器,使其容易受干扰干扰干扰。本文建议采用射线切换法,这种方法可以减轻安装低分辨率模拟数字转换器(ADCs)的BS上传中永久传输干扰器的影响。 光滑法是一种本地模拟模拟模拟空间变换法,可以将干扰器的能量集中到几个ADCs,这样传输的数据才能根据无干扰ADCs的输出而恢复。我们展示了在两个数字干扰器-减轻数据探测器(SNIPS和CHOPS)的组合中,这种方法可以减轻装有低分辨率模拟至数字转换器(MMMU-MIMOs)的永久传输干扰干扰器在传输中的影响。光滑动法是一种本地模拟模拟空间变换式空间变换式变换式,将软调器能将干扰器能量集中到几个A-NIPS-CHDS-S-ODS-O 的系统变换器,从而将SMADS-O-O-O-O-O-O-O-ODSDSDSUDSDSL 的系统变换成一个部分。