{"id":348,"date":"2012-07-19T11:01:09","date_gmt":"2012-07-19T09:01:09","guid":{"rendered":"https:\/\/samovar2022.int-evry.fr\/index.php\/2012\/07\/19\/egalisation-aveugle-a-complexite-quadratique\/"},"modified":"2020-09-04T18:46:59","modified_gmt":"2020-09-04T16:46:59","slug":"egalisation-aveugle-a-complexite-quadratique","status":"publish","type":"post","link":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/2012\/07\/19\/egalisation-aveugle-a-complexite-quadratique\/","title":{"rendered":"\u00ab\u00a0Egalisation aveugle \u00e0 complexit\u00e9 quadratique\u00a0\u00bb"},"content":{"rendered":"<p>pr\u00e9sent\u00e9 par <strong>Houssem Gazzah<\/strong> (Assistant Professor University Of Sharjah Department of Electrical and Computer Engineering).<\/p>\n<p>jeudi <strong>26 Juillet<\/strong> \u00e0 10h00 en salle C06<\/p>\n<p><strong>R\u00e9sum\u00e9 :<\/strong><\/p>\n<p>Nous pr\u00e9sentons une technique originale du traitement du signal pour les<br \/>\ncanaux MIMO. Le compactage permet, par le biais d&rsquo;une transformation lin\u00e9aire de taille r\u00e9duite, de transformer un canal MIMO donn\u00e9 en un canal \u00e9quivalent, de m\u00eame taille, mais de m\u00e9moire r\u00e9duite (de un ou de plusieurs coefficients).<\/p>\n<p>L&rsquo;application r\u00e9p\u00e9t\u00e9e de ce compactage permet de r\u00e9duire progressivement la quantit\u00e9 d&rsquo;interf\u00e9rence inter-symboles induite par le canal.<\/p>\n<p>De ce point de vue, c&rsquo;est une technique de \u00ab\u00a0channel shortening\u00a0\u00bb (raccourcissement canal), pertinente pour les syst\u00e8mes OFDM pour qui elle permet de r\u00e9duire la taille du temps de garde. In fine, l&rsquo;interf\u00e9rence inter-symboles est supprim\u00e9e, achevant ainsi une \u00e9galisation de for\u00e7age \u00e0 z\u00e9ro.<\/p>\n<p>D&rsquo;un cote, les dimensions de la matrice de compactage est ind\u00e9pendante de la m\u00e9moire M du canal. D&rsquo;un autre cote, il est ex\u00e9cut\u00e9 M fois au plus. Il s&rsquo;en suit une complexit\u00e9 quadratique en M.<\/p>\n<p>La dite transformation de compactage est obtenue de mani\u00e8re \u00ab\u00a0aveugle\u00a0\u00bb \u00e0 partir de la matrice de corr\u00e9lation relative aux observations canal. Ainsi, l&rsquo;\u00e9galisation par compactage se place parmi les techniques sous-espaces. Cependant, sa complexit\u00e9 quadratique est unique alors que ces derniers pr\u00e9sentent tous une complexit\u00e9 cubique.<\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>pr\u00e9sent\u00e9 par Houssem Gazzah (Assistant Professor University Of Sharjah Department of Electrical and Computer Engineering). jeudi 26 Juillet \u00e0 10h00 en salle C06 R\u00e9sum\u00e9 : Nous pr\u00e9sentons une technique originale du traitement du signal pour les canaux MIMO. Le compactage permet, par le biais d&rsquo;une transformation lin\u00e9aire de taille r\u00e9duite, de transformer un canal MIMO [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[418],"tags":[],"class_list":["post-348","post","type-post","status-publish","format-standard","hentry","category-theses-2012-fr","entry"],"_links":{"self":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/comments?post=348"}],"version-history":[{"count":1,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/348\/revisions"}],"predecessor-version":[{"id":1906,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/348\/revisions\/1906"}],"wp:attachment":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media?parent=348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/categories?post=348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/tags?post=348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}