Print Email Facebook Twitter Enhancing Indoor-to-Outdoor mmWave Communication with Transparent Amplifying Intelligent Surface Title Enhancing Indoor-to-Outdoor mmWave Communication with Transparent Amplifying Intelligent Surface Author Liu, Bin (Katholieke Universiteit Leuven) Wang, Q. (TU Delft Embedded Systems) Pollin, Sofie (Katholieke Universiteit Leuven) Date 2023 Abstract This paper presents a novel transparent amplifying intelligent surface (TAIS) architecture for uplink enhancement in indoor-to-outdoor mmWave communications. The TAIS is an amplifier-based transmissive intelligent surface that can refract and amplify the incident signal, instead of only refracting it with adjustable phase shift by most passive reconfigurable intelligent surfaces (RIS). With advanced indium tin oxide film and printing technology, TAIS can be fabricated on the windows without any visual effects. This paper primarily focuses on exploiting the TAIS-based architecture to boost the uplink spectral efficiency (SE) in indoor-to-outdoor mmWave communications. By jointly optimizing the TAIS's phase shift matrix and transmit power of the user equipment, the uplink SE can be maximized by exploiting the nonlinearity in the TAIS's amplification process. The key point is that we drive the optimal phase shift matrix that maximizes the SE and deduces its closed-form representation. The SE maximization is then proved to be transferred to the transmit power optimization problem. Another important aspect is that we design a low-complexity algorithm to solve the problem using the difference of convex programming. Simulations show that our proposed TAIS can increase the SE by up to 32.6% as compared to its alternative methods. Subject Reconfigurable intelligent surfacetransparent amplifying intelligent surface (TAIS)spectral efficiencyindoorto-outdoor communicationnonlinear amplification To reference this document use: http://resolver.tudelft.nl/uuid:37ef1cde-31b3-49f8-8848-51a4da2a332b DOI https://doi.org/10.1109/ICC45041.2023.10279668 Publisher IEEE Embargo date 2024-04-23 ISBN 978-1-5386-7463-5 Source Proceedings of the ICC 2023 - IEEE International Conference on Communications Event ICC 2023 - IEEE International Conference on Communications, 2023-05-28 → 2023-06-01, Rome, Italy Series IEEE International Conference on Communications, 1938-1883 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2023 Bin Liu, Q. Wang, Sofie Pollin Files PDF Enhancing_Indoor_to_Outdo ... urface.pdf 568.04 KB Close viewer /islandora/object/uuid:37ef1cde-31b3-49f8-8848-51a4da2a332b/datastream/OBJ/view