2020/09/29 by Thomas Choi, Peng Luo, Akshay Ramesh +1 · 2 citations
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Antenna (radio) #Beamforming #Computer science #Distributed antenna system #Electrical engineering #Electronic engineering #Energy Harvesting in Wireless Networks #Engineering #MIMO #Millimeter-Wave Propagation and Modeling #Multi-user MIMO #Precoding #Spectral efficiency #Telecommunications #Telecommunications link #Topology (electrical circuits) #Transmission (telecommunications) #cs.SY #eess.SP #eess.SY
paper · pdf · doi:10.1109/ieeeconf51394.2020.9443568
published as 2020 54th Asilomar Conference on Signals, Systems, and Computers · 6 pages, 5 figures, 2020 Asilomar Conference on Signals, Systems, and Computers
arxiv created 2020/09/29 · openalex publication_date 2020/11/01 · arxiv updated 2021/08/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
With the growing interest in cell-free massive multiple-input multiple-output (MIMO) systems, the benefits of single-antenna access points (APs) versus multi-antenna APs must be analyzed in order to optimize deployment. In this paper, we compare various antenna system topologies based on achievable downlink spectral efficiency, using both measured and synthetic channel data in an indoor environment. We assume multi-user scenarios, analyzing both conjugate beamforming (or maximum-ratio transmission (MRT)) and zero-forcing (ZF) precoding methods. The results show that the semi-distributed multi-antenna APs can reduce the number of APs, and still achieve the comparable achievable rates as the fully-distributed single-antenna APs with the same total number of antennas.