{"id":57494,"date":"2026-04-13T09:01:15","date_gmt":"2026-04-13T07:01:15","guid":{"rendered":"https:\/\/www.nae.fr\/2026\/04\/13\/secure-uplink-transmission-in-uav-assisted-dual-orbit-sagin-over-mixed-rf-fso-links\/"},"modified":"2026-04-13T09:01:15","modified_gmt":"2026-04-13T07:01:15","slug":"secure-uplink-transmission-in-uav-assisted-dual-orbit-sagin-over-mixed-rf-fso-links","status":"publish","type":"post","link":"https:\/\/www.nae.fr\/en\/2026\/04\/13\/secure-uplink-transmission-in-uav-assisted-dual-orbit-sagin-over-mixed-rf-fso-links\/","title":{"rendered":"Secure Uplink Transmission in UAV-Assisted Dual-Orbit SAGIN over Mixed RF-FSO Links"},"content":{"rendered":"<blockquote>\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"row mx-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"ExpressionSummary svelte-ccn03w\">\n<div class=\"row mx-0\">\n<div class=\"chapo\">\n<div class=\"mb-4\">\n<div class=\"chapo\">\n<div class=\"post__live-container--answer\">\n<p class=\"post__live-container--answer-text post__space-node\">To meet the need for global coverage, space\u2013air\u2013ground integrated networks (SAGINs) are crucial, but the openness of wireless links makes communications vulnerable to eavesdropping. This paper investigates the physical layer security (PLS) of uplink transmissions in a cooperative dual-hop SAGIN. The system comprises a ground source with a directional antenna, an unmanned aerial vehicle (UAV) relay cluster, and a low Earth orbit (LEO) satellite. Utilizing stochastic geometry, we model the spatial randomness of terrestrial eavesdroppers and the multi-layered dual-orbital LEO destination. To combat mixed radio-frequency (RF) and free-space optical (FSO) fading, multiple relay selection and maximum ratio combining (MRC) are integrated into the UAV cluster. We analytically derive the piecewise probability density function for the FSO link distance, obtaining exact closed-form expressions for the end-to-end secrecy outage probability (SOP).<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/blockquote>\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"row mx-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n<div class=\"info-article\">\n<div class=\"title-hat pl-0\">\n\nPour en savoir plus : <a href=\"https:\/\/www.mdpi.com\/2226-4310\/13\/4\/341\" target=\"_blank\" rel=\"noopener\">Secure Uplink Transmission in UAV-Assisted Dual-Orbit SAGIN over Mixed RF-FSO Links<\/a>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>To meet the need for global coverage, space\u2013air\u2013ground integrated networks (SAGINs) are crucial, but the openness of wireless links makes communications vulnerable to eavesdropping. This paper investigates the physical layer security (PLS) of uplink transmissions in a cooperative dual-hop SAGIN. The system comprises a ground source with a directional antenna, an unmanned aerial vehicle (UAV) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":55241,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24,34,16],"tags":[35,44,33],"class_list":["post-57494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite-spatial","category-innovation-et-technologique","category-rti","tag-actualites","tag-developpement-des-systemes-intelligents","tag-drones"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Secure Uplink Transmission in UAV-Assisted Dual-Orbit SAGIN over Mixed RF-FSO Links - NAE<\/title>\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.nae.fr\/en\/2026\/04\/13\/secure-uplink-transmission-in-uav-assisted-dual-orbit-sagin-over-mixed-rf-fso-links\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Secure Uplink Transmission in UAV-Assisted Dual-Orbit SAGIN over Mixed RF-FSO Links - NAE\" \/>\n<meta property=\"og:description\" content=\"To meet the need for global coverage, space\u2013air\u2013ground integrated networks (SAGINs) are crucial, but the openness of wireless links makes communications vulnerable to eavesdropping. This paper investigates the physical layer security (PLS) of uplink transmissions in a cooperative dual-hop SAGIN. 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