Experimental Analysis of Concentrated versus Distributed Massive MIMO in an Indoor Cell at 3.5 GHz

This paper presents a measurement-based comparison between distributed and concentrated massive multiple-input multiple-output (MIMO) systems, which are called D-mMIMO C-mMIMO in an indoor environment considering 400 MHz bandwidth centered at 3.5 GHz. In both cases, we have considered array of 64 antennas the base station eight simultaneously active users. The work focuses on characterization schemes up-link, analysis sum capacity, total spectral efficiency (SE) achievable by using zero forcing (ZF) combining method, as well user fairness. effect power imbalance different transmitters or terminal (UT) locations, thus, benefits performing adequate control also investigated. differences channel performances explained through observation structure their respective measured matrices parameters such condition number channels established each UT. measurements been performed frequency domain, emulating MIMO system framework time-domain duplex orthogonal multiple access network (TDD-OFDM-MIMO). is based virtual technique for systems. deployment D-MIMO distribution users measurement environment, has arranged realistically possible, avoiding movement people machines.