Spatial separation of closely-spaced users in measured massive multi-user MIMO channels
作者： Jose Flordelis , Xiang Gao , Ghassan Dahman , Fredrik Rusek , Ove Edfors
关键词: Antenna array 、 Matrix (mathematics) 、 Multi-user MIMO 、 Communication channel 、 Computer science 、 Control theory 、 Separation (aeronautics) 、 Topology 、 MIMO 、 Antenna (radio)
摘要: Fully-synchronous measurements of a massive multi-user multiple-input multiple-output (MU-MIMO) radio propagation channel are presented. We evaluate the ability MIMO system to spatially separate users located close each other in line-of-sight (LOS) conditions. The consists base-station (BS) antenna array equipped with 64 dual-polarized elements (128 ports) arranged cylindrical configuration, and eight single-antenna users. confined five-meter diameter circle move randomly at pedestrian speeds. BS is on top 20 m tall building has LOS examine user separability by studying singular value spread MU-MIMO matrix for several subsets ports, along sum-rate capacity achievable sum-rates both zero-forcing matched-filtering linear precoders. also analyze performance lowest rate. Finally, comparison between offered that conventional provided. To best our knowledge, this first report fully-synchronous dynamic system. Our investigation shows even conditions can be separated
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