# A Novel and Adaptive Angle Diversity-Based Receiver for 6G Underground Mining VLC Systems
## 5 Conclusions  
This article presents a novel and adaptive angle diversity-based receiver for 6G UM-VLC systems. The performance of the adaptive orientation solution based on the RSSR scheme, which is implemented in a hemidodecahedral ADR, is verified. The architecture and methodology of the proposed solution were analyzed mathematically and geometrically in the reception stage of an UM-VLC scheme through computational simulations. The evaluation was performed in terms of received power, user data rate, and BER, and its numerical results were compared with the pyramidal and hemidecahedral ADRs solutions with fixed PDs and considering the ToA orientation method. The findings derived from the described metrics demonstrate that the solution proposed in this manuscript perform better than typical ADRs in UM-VLC schemes; consequently, it improves the fulfillment of the communication goals of the UM-VLC system. Specifically, for the user data rate distribution in the UM-VLC scenario, the solution proposed in this article presents an improvement of over 50% with respect to the state-of-the-art solutions used for comparison in this work. On the other hand, when we analyze the BER curves, the proposed solution enhances the BER of the system compared to typical ADR solutions. Therefore, the enhancement of the system is due to the mitigation of ICI, and the external factors that affect the UM-VLC environment due to the efficient, as well as adaptive and automatic orientation that the PDs have in the hemidodecahedral ADR. The improvement in signal reception performance implies an improvement in the operation of the UM-VLC system, which increases the chances of being considered as part of the enabling technologies for 6G wireless communications systems.  
As future work, a physical and experimental implementation and validation of the solution presented in this manuscript will be considered along with electromechanical mechanisms that generate the automatic adaptive orientation of the PDs. Furthermore, the behavior and performance of the created solution will be verified in other VLC environments based on specific channel models for these environments.  
Conceptualization, P.P.J. and C.A.A.-M.; methodology, P.P.J.; software, P.P.J.; validation, C.A.A.-M., I.S. ([PERSON]), A.D.F., D.Z.-B., I.S. ([PERSON]), D.P., and M.I.; formal analysis, P.P.J.; investigation, P.P.J.; resources, C.A.A.-M.; data curation, P.P.J.; writing--original draft preparation, P.P.J.; writing--review and editing, P.P.J., C.A.-M., I.S. ([PERSON]), A.D.F., D.Z.-B., I.S. ([PERSON]), D.P., and M.I.; supervision, C.A.A.-M.; project administration, C.A.-M.; funding acquisition, P.P.J., C.A.A.-M. and I.S. ([PERSON]). All authors have read and agreed to the published version of the manuscript.  
This research was funded by ANID FONDECYT Regular No. 1211132 and ANID PFCHA/Beca de Doctorado Nacional/2019 21190489.  
Not applicable.  
The data presented in this study are available on request from the corresponding author.  
This work was supported by Project FONDECYT Regular 1211132. This work was partially supported by CODELCO: Concuso Piensa Mineria 2021; SENESCYT \"Convocatoria abierta 2014-primera fase, Acta CIBAE-023-2014\"; UDLA Telecommunications Engineering Degree FICA, UDLA; Competition for Research Regular Projects, year 2021, code LPR21-02; UCM-IN-21200 internal grant, Universidad Tecnologica Metropolitana, and Fondef ID21110191.  
The authors declare no conflict of interest.