{"id":2106,"date":"2026-10-27T11:19:40","date_gmt":"2026-10-27T10:19:40","guid":{"rendered":"https:\/\/au.feri.um.si\/losdv\/projekti\/ofdm-radar\/"},"modified":"2026-10-27T12:05:19","modified_gmt":"2026-10-27T11:05:19","slug":"ofdm-radar","status":"publish","type":"page","link":"https:\/\/au.feri.um.si\/losdv\/projekti\/ofdm-radar\/","title":{"rendered":"OFDM radar na platformi USRP"},"content":{"rendered":"\n<section class=\"wp-block-group alignfull au-section au-section--dark au-projhero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group au-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"au-back wp-block-paragraph\"><a href=\"\/losdv\/#iz-nasega-dela\">\u2190 Projekti in zaklju\u010dna dela<\/a><\/p>\n\n\n<p class=\"au-eyebrow wp-block-paragraph\">01.10 \u00b7 Magistrsko delo<\/p>\n\n\n<h1 class=\"wp-block-heading\">OFDM radar na platformi USRP<\/h1>\n\n\n<p class=\"au-lead wp-block-paragraph\">Radar, ki uporablja modulacijo OFDM \u2013 enako kot Wi-Fi in 5G. Izveden je na programsko dolo\u010denem radiu USRP, zato ga lahko spreminjamo kar v programski opremi.<\/p>\n\n\n<div class=\"anim-box\">\n      <canvas id=\"anim\" aria-label=\"Animacija: oddani okvir OFDM s podnosilci in simboli; po deljenju sprejetega in oddanega okvirja ostane fazni vzorec, katerega nagib po podnosilcih dolo\u010da razdaljo, nagib po simbolih pa hitrost cilja; dvodimenzionalna FFT ga pretvori v razdaljno-hitrostno mapo z vrhom pri cilju.\"><\/canvas>\n      <div class=\"anim-cap mono\"><span>Ponazoritev \u00b7 okvir OFDM \u2192 Rx \/ Tx \u2192 2D FFT \u2192 razdalja in hitrost<\/span><button class=\"anim-toggle\" type=\"button\">Ustavi<\/button><\/div>\n    <\/div>\n<\/div>\n<\/section>\n\n\n\n<section class=\"wp-block-group alignfull au-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group au-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns au-projbody is-layout-flex wp-container-core-columns-is-layout-89c98654 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<h2 class=\"wp-block-heading\">O projektu<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Radar, ki uporablja modulacijo OFDM \u2013 enako kot Wi-Fi in 5G. Izveden je na programsko dolo\u010denem radiu USRP, zato ga lahko spreminjamo kar v programski opremi.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Pri OFDM se podatki prena\u0161ajo hkrati na mno\u017eici ozkih podnosilcev. Ko se oddani signal odbije od cilja, se vsakemu podnosilcu spremeni faza: zakasnitev odboja povzro\u010di fazni nagib vzdol\u017e podnosilcev, gibanje cilja pa fazni nagib od simbola do simbola. Isti signal lahko zato hkrati prena\u0161a podatke in slu\u017ei kot radar.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Kako deluje<\/h2>\n\n\n<ol class=\"wp-block-list au-steps\">\n<li><strong>Oddaja<\/strong>: USRP odda okvir OFDM \u2013 mre\u017eo podnosilcev (frekvenca) in zaporednih simbolov (\u010das).<\/li>\n\n\n<li><strong>Sprejem<\/strong>: odbiti signal sprejme drugi USRP; obe napravi sta povezani v na\u010dinu MIMO, ra\u010dunalnik pa z napravo USRP N210 prek povezave 10 Gbit\/s.<\/li>\n\n\n<li><strong>Deljenje Rx \/ Tx<\/strong> po elementih odstrani oddane podatke; ostane le vpliv kanala oziroma cilja.<\/li>\n\n\n<li><strong>2D FFT<\/strong>: transformacija vzdol\u017e podnosilcev da razdaljo, vzdol\u017e simbolov pa hitrost \u2013 rezultat je razdaljno-hitrostna mapa.<\/li>\n<\/ol>\n<\/div>\n\n\n<div class=\"wp-block-column au-facts is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-table au-facts__table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Vrsta<\/td><td>Magistrsko delo<\/td><\/tr><tr><td>Podro\u010dje<\/td><td>Obdelava radarskih signalov<\/td><\/tr><tr><td>Modulacija<\/td><td>OFDM<\/td><\/tr><tr><td>Strojna oprema<\/td><td>USRP N210, USRP B210 (MIMO)<\/td><\/tr><tr><td>Povezava<\/td><td>10 Gbit\/s do ra\u010dunalnika<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aef537f4a3f7&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aef537f4a3f7\" class=\"wp-block-image size-full wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"\/losdv\/wp-content\/uploads\/sites\/4\/2026\/10\/OFDM_radar.png\" alt=\"Program OFDM radar USRP, shema povezave ra\u010dunalnik \u2013 USRP N210 \u2013 USRP B210 in razdaljno-hitrostni mapi\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group au-projnav is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><a href=\"\/losdv\/projekti\/raketa-pristanek\/\"><span>\u2190 Prej\u0161nji<\/span>Raketa, ki pristane sama<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"\/losdv\/projekti\/uwb-lokalizacija\/\"><span>Naslednji \u2192<\/span>Lokalizacija z ultra\u0161irokopasovnim radiem<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>\u2190 Projekti in zaklju\u010dna dela 01.10 \u00b7 Magistrsko delo OFDM radar na platformi USRP Radar, ki uporablja modulacijo OFDM \u2013 enako kot Wi-Fi in 5G. Izveden je na programsko dolo\u010denem radiu USRP, zato ga lahko spreminjamo kar v programski opremi. Ponazoritev \u00b7 okvir OFDM \u2192 Rx \/ Tx \u2192 2D FFT \u2192 razdalja in hitrostUstavi [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2098,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"page-brez-naslova","meta":{"footnotes":""},"class_list":["post-2106","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/comments?post=2106"}],"version-history":[{"count":1,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2106\/revisions"}],"predecessor-version":[{"id":2119,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2106\/revisions\/2119"}],"up":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2098"}],"wp:attachment":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/media?parent=2106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}