{"id":18008,"date":"2026-05-18T17:20:05","date_gmt":"2026-05-18T15:20:05","guid":{"rendered":"https:\/\/www.uni.lu\/research-en\/?post_type=events&#038;p=18008"},"modified":"2026-05-20T14:31:47","modified_gmt":"2026-05-20T12:31:47","slug":"doctoral-defence-carlos-luis-marcos-rojas","status":"publish","type":"events","link":"https:\/\/www.uni.lu\/research-en\/events\/doctoral-defence-carlos-luis-marcos-rojas\/","title":{"rendered":"Doctoral Defence: Carlos Luis MARCOS ROJAS"},"content":{"rendered":"\n<section class=\"py-0 wp-block-unilux-blocks-free-section section\"><div class=\"container xl:max-w-screen-xl\"><div class=\"wp-block-unilux-blocks-spacer is-spacer-size-md\"><\/div>\n\n\n<p>The <a href=\"https:\/\/www.uni.lu\/research-en\/doctoral-education\/dsse\/\">Doctoral School in Science and Engineering<\/a> is happy to invite you to Carlos Luis MARCOS ROJAS\u2019s defence entitled<\/p>\n\n\n\n<h2 class=\"has-text-align-left wp-block-unilux-blocks-heading\"        id=\"combining-techniques-for-the-reception-of-signals-from-satellite-constellations-with-path-diversity-at-the-user-terminals\"\n    >\nCombining Techniques for the Reception of Signals from Satellite Constellations with Path Diversity at the User Terminals<\/h2>\n\n\n\n<p><strong>Supervisor<\/strong>: <a href=\"https:\/\/www.uni.lu\/snt-en\/people\/juan-carlos-merlano-duncan\/\">Dr. Juan Carlos MERLANO DUNCAN<\/a><\/p>\n\n\n\n<p>The large-scale deployment of non\u2011terrestrial networks (NTNs) based on non\u2011geostationary orbit (NGSO) satellite constellations is transforming the design paradigm of satellite communication systems. The availability of multiple simultaneously visible satellites at the user terminal (UT) enables the exploitation of spatial diversity through cooperative transmission. However, practical realization of such techniques is severely constrained by symbol\u2011level time misalignment caused by differential propagation delays, satellite motion, and heterogeneous onboard clocks. These impairments fundamentally challenge the applicability of classical transmit\u2011diversity techniques, such as space\u2013time block coding (STBC), which rely on strict synchronization assumptions that are rarely satisfied in realistic satellite environments.<\/p>\n\n\n\n<ul class=\"wp-block-unilux-blocks-custom-buttons btn-list\"><li class=\"wp-block-unilux-blocks-custom-button\"    aria-disabled=\"false\"\n    >\n    <a\n        role=\"link\"\n        aria-disabled=\"false\"\n                    href=\"https:\/\/www.uni.lu\/research-en\/calendar?post_type=events&#038;p=18008&#038;calendar\"\n                target=\"_self\"\n        class=\"btn btn--secondary\"\n            >Add to calendar<\/a>\n<\/li>\n<\/ul>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>Doctoral defence <\/p>\n","protected":false},"author":213,"featured_media":7166,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"featured_image_focal_point":{"x":0.55,"y":0.47},"show_featured_caption":false,"ulux_newsletter_groups":"","uluxPostTitle":"","uluxPrePostTitle":"","_trash_the_other_posts":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"event_start_date":"2026-06-17 10:00:00","event_end_date":"2026-06-17 13:00:00","event_speaker_name":"Carlos Luis MARCOS ROJAS","event_speaker_link":"","event_is_online":false,"event_location":"University of Luxembourg - JFK (Kirchberg) - Room Nancy - Metz","event_street":"29, Avenue J.F Kennedy","event_location_link":"https:\/\/www.uni.lu\/en\/about\/campuses\/","event_zip_code":"1855","event_city":"Luxembourg","event_country":"Luxembourg"},"events-topic":[286],"events-type":[281,283],"organisation":[61,60,218,229],"authorship":[213],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v22.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Doctoral Defence: Carlos Luis MARCOS ROJAS I University of Luxembourg<\/title>\n<meta name=\"description\" content=\"Doctoral defence\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.uni.lu\/research-en\/events\/doctoral-defence-carlos-luis-marcos-rojas\/\" \/>\n<meta property=\"og:locale\" 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