{"id":69680,"date":"2018-03-09T23:14:09","date_gmt":"2018-03-09T23:14:09","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/fuzzy-processing-for-interference-cancellation-in-ds-cdma-systems\/"},"modified":"2018-03-09T23:14:09","modified_gmt":"2018-03-09T23:14:09","slug":"fuzzy-processing-for-interference-cancellation-in-ds-cdma-systems","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/politecnica-de-catalunya\/fuzzy-processing-for-interference-cancellation-in-ds-cdma-systems\/","title":{"rendered":"Fuzzy processing for interference cancellation in ds-cdma systems"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Joan Bas Botella <\/strong><\/h2>\n<p>Las estructuras de cancelaci\u00f3n que se han desarrollado en esta tesis est\u00e1n orientadas a la obtenci\u00f3n de receptores de baja complejidad. As\u00ed si tomamos como ejemplo umts vemos que los terminales m\u00f3viles muestran m\u00e1s restricciones que los detectores del enlace ascendente, y por tanto presentan un mayor reto.  en cualquier caso, las restricciones de complejidad y potencia son un tema clave en los terminales m\u00f3viles, ya sea para aplicaciones celulares como umts o descentralizadas como wlan (ej. Ieee 802.11b). Tambi\u00e9n una capacidad de trabajo en tiempo real y de r\u00e1pida adaptaci\u00f3n es importante. En la presente tesis se ha estudiado la utilidad de los sistemas de l\u00f3gica fuzzy en esta clase de receptores de comunicaciones. En t\u00e9rminos generalesel fundamento ling\u00ed\u00bc\u00edstico que no \u00fanicamente estad\u00edstico de dichos sistemas permite dise\u00f1ar receptores escalables en complejidad.  la principal problem\u00e1tica ha sido la cancelaci\u00f3n de dos tipos de interferencias en los sistemas ds-ss (direct sequence- spread spectrum) como umts o ieee 802.11b: interferencias de banda estrecha (nbi) e interferencias de m\u00faltiple acceso (may). Por interferencias de banda estrecha (nbi) entendemos las interferencias que ocupan un ancho de banda mucho menor que la se\u00f1al de espectro ensanchado mientras que las interferencias mai ocupan uno mucho mayor. Por interferencias de m\u00faltiple acceso (mai), entendemos las interferencias producidas por otros usuarios de espectro ensanchado.  un cancelador de interferencias de banda estrecha (nbi) puede ser implementado mediante l\u00f3gica fuzzy gracias a capacidad de aproximaci\u00f3n universal de funciones. Este caso, esta propiedad se utiliza para modelar la suavidad de las interferencias. Por tanto, es posible eliminar las interferencias que tengan el mismo patr\u00f3n de suavidad aunque tengan diferente estructura. por tanto, la independencia en la estructura de la interferencia nos permite afirmar que la capacidad de aproxim<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Fuzzy processing for interference cancellation in ds-cdma systems<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Fuzzy processing for interference cancellation in ds-cdma systems <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Joan Bas Botella <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/07\/2004<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Ana Isabel P\u00e9rez Neira<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Miguel angel Lagunas hern\u00e1ndez <\/li>\n<li>julio Guti\u00e9rrez r\u00edos (vocal)<\/li>\n<li>eduard Montseny masip (vocal)<\/li>\n<li>Jes\u00fas Cid sueiro (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Joan Bas Botella Las estructuras de cancelaci\u00f3n que se han desarrollado en esta tesis est\u00e1n orientadas a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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