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aranzadi.eus

Gracias a la ayuda y confianza depositada en nosotros por el Departamento de Cultura de Gobierno Vasco, el Departamento de Cultura de la Diputación Foral de Gipuzkoa y el Ministerio de Cultura, la Sociedad de Ciencias Aranzadi está llevando a cabo diversos proyectos para implantar un sistema de Archivo documental y fotográfico.

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formatex.info

Building a strong personal brand on Instagram requires understanding what truly captivates your audience within this digital landscape, where the impact of content is paramount. A study by TechReport indicates that video posts on Instagram have an average engagement rate of 0.68%, slightly higher than other types of posts at…

hal.univ-brest.fr

Visible light communication (VLC) is a promising technology for indoor wireless connectivity, offering high-speed data transmission and alleviating spectrum congestion. This thesis explores the integration of non-orthogonal multiple access (NOMA) and multiple-input multiple-output (MIMO) techniques to improve VLC system efficiency. We investigate various power allocation techniques, including fixed power allocation (FPA), gain ratio power allocation (GRPA), and normalized gain difference power allocation (NGDPA), to enhance resource distribution among users. Different user pairing algorithms, such as next-largest difference user-pairing algorithm (NLUPA) and uniform channel gain difference (UCGD), are also examined. The achievable sum rate for NOMAMIMO-VLC systems is analyzed in scenarios with even and odd user numbers, and results are compared with NOMA without pairing and orthogonal frequency division multiple access (OFDMA). Furthermore, we assess the bit error rate (BER) performance under diversity techniques, such as selection combining (SC), equal gain combining (EGC), and maximum ratio combining (MRC). Finally, we derive an analytic expression for BER for an arbitrary number of users. Overall, our comprehensive study provides valuable insights into NOMA-MIMO-VLC systems for indoor wireless communication.

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