Abstract
Distributed MIMO (D-MIMO) systems are expected to play a key role in deployments for future mobile communications. Together with massive MIMO technology, D-MIMO aims to maximize the spectral efficiency and data rate in mobile networks. This paper proposes a deep study on the spectral efficiency of D-MIMO systems for essential channel parameters, such as the channel power balance or the correlation between propagation channels. For that purpose, several propagation channels were acquired in both anechoic and reverberation chambers and were emulated using channel simulators. In addition, several frequency bands were studied, both the sub–6 GHz band and mmWave band. The results of this study revealed the high influence of channel correlation and power balance on the physical channel performance. Low-correlated and high-power balance propagation channels show better performances than high correlated and power unbalance channels in terms of spectral efficiency. Given these results, it will be fundamental to take into account the spectral efficiency of D-MIMO systems when designing criteria to establish multi-connectivity in future mobile network deployments.
Highlights
The prognosis for average user data consumption in 2026 is expected to be 35 GB/month compared with approximately 9 GB/month currently [1,2], which implies a 25% compound annual growth rate
It is expected that the above usage cases and any future cases will require the same type of 5G key performance indicators (KPIs) including: (i) new target values; and (ii) new cut-off hybrids across the three types of user services for 5G, enhanced mobile broadband, ultra-reliable low-latency communications and massive machine-type communi
The main goal to study the scenarios is the emulation of distributed multiple-input multiple-output (MIMO) systems by combining values from several communication channels acquired in different environments
Summary
The prognosis for average user data consumption in 2026 is expected to be 35 GB/month compared with approximately 9 GB/month currently [1,2], which implies a 25% compound annual growth rate. 27 GB/month per user, compared with 6 GB/month today Applications contributing to this dramatic increase in 2026 include: (i) 1080 p full HD (1920 × 1080); (ii) full HD virtual reality (VR); and (iii) 4K UHD (3840 × 2160). Beyond 2026, more demanding video streaming applications are expected to take user traffic to new levels, such as: (i) 8K UHD (7680 × 4320); and (ii) volumetric data streaming [3]. This prediction shows an increase of approximately 4 times in 5 years until 2026.
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