Impact of Polarization Diversity in Massive MIMO for Industry 4.0

Abstract

The massive polarimetric radio channel is evaluated in an indoor industrial scenario at 3.5 GHz using a 10×10 uniform rectangular array (URA). The analysis is based on (1) propagation characteristics like the average received power and the power to interference ratio from the Gram matrix and (2) system-oriented metrics such as sum-rate capacity with maximum-ratio transmitter (MRT). The results clearly show the impact of polarization diversity in an industrial scenario and how it can considerably improve different aspects of the system design. Results for sum-rate capacity are promising and show that the extra degree of freedom, provided by polarization diversity, can optimize the performance of a very simple precoder, the MRT.

Massive MIMO Communication Strategy Using Polarization Diversity for Industrial Scenarios

“…1(b) by the numbered circles. More details concerning the environment can be found in [11]. The Rx positions have been selected to cover various configurations, i.e.…”

“…Nonetheless, massive MIMO measurements in industrial scenarios are quite scarce. In a previous work [11], polarimetric channel measurements of a Multi-User (MU) Multiple-Input Single-Output (MISO) setup for an indoor industrial scenario are presented. The center frequency and the bandwidth of analysis are equal to 3.5 GHz and 80 MHz, respectively, the number of array elements being 100.…”

“…This was motivated by prior experimental results showing that, in this case, correlation decreases. Despite power loss at Rx due to X-polar conditions, it was shown in [11] that channel capacity, with MRT precoding, is improved especially in strong LOS scenario.…”

“…The proposed strategy will be evaluated using measured channels at 3.5 GHz in the same industrial hall as in [11], [12]. Different LOS and NLOS configurations have been considered, the fixed Tx array being a 10 x 10 uniform square array.…”

Quaternion Model of Higher-Order Rotating Polarization Wave Modulation for High Data Rate M2M LPWAN Communication

“…F. Challita et al [ 14 ] have investigated the performance of PD for a massive MIMO system in industrial environment to address the problem of cross-polarization discrimination. F. Challita et al [ 15 ] have reported significant improvement in spectral efficiency in PD based massive MIMO system for Industry 4.0 applications. There is a gap, however, in existing literature on exploring PD for M2M and industrial communication.…”