Abstract
In this work, line-of-sight multiple-input multiple-output (MIMO) measurements in the frequency range from 1 GHz to 40 GHz are presented for an indoor environment in the scope of new 5G bands. For the sake of comparison, the measured radio channels are reproduced with great accuracy using ray-tracing techniques by tuning all propagation mechanisms. The relative received power, root mean square of the delay spread (RMS DS) and K-factor provide an insight of how propagation behaves in indoor scenarios within a large and contiguous frequency band. Results show that a decay factor behaves nearly constant with frequency and the RMS DS is quite sensible to frequency. From these results, faithful one-slope 5G models are proposed. Finally, the contribution of the simulated propagation mechanisms to the radio channel is investigated which suggests that the simulation of the low-mmW radio channel can be simplified.
Highlights
Millimeter wave frequencies for 5G and beyond has gained considerable attention within the wireless industry
We have presented multiple-input multiple-output (MIMO) experimental results on LoS data over the whole 1–40 GHz
We have presented MIMO experimental results on LoS data over the whole 1–40 band in an m3 office
Summary
Millimeter wave (mm-wave) frequencies for 5G and beyond has gained considerable attention within the wireless industry. The main reason is the availability of large bandwidths from 30 GHz to. 300 GHz that will be used to increase the wireless binary rates above 10 Gbps [1]. The mobile data will reasonably grow up from 12 exabytes per month at the end of 2017 up to 77 exabytes per month in 2022 [2]. It is important to highlight the importance of advanced techniques as massive line-of-sight MIMO to achieve higher bit rates as seen in [4] in vehicular communications, [5,6,7] in wireless sensor networks and [8] in ultra-dense networks; without a thorough analysis of the radio channel, massive MIMO will be of difficult application [9]
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