The power amplifier (PA) is the key component of the transmit chain in a mobile telecommunication system. It allows the coverage of a wide service area but it\u2019s non-linear effects need to be compensated in order to obtain high linearity and efficiency without introducing interference on the adjacent channels. Digital Pre-Distortion (DPD) is the commonly used solution to overcome these problems. The The LTE system makes use of OFDM modulation used in modern systems, provides signals with wide bandwidth, but low average power, thus common PA designs achieve low average efficiency.\nDual-input Doherty power amplifiers with digital steering introduce new degrees of freedom in terms of linearization and reconfiguration.\nThis work analyzes the tradeoffs between linearity, efficiency and linearization bandwidth, when digitally driving the DPA inputs separately. The knowledge of the physics of the devices allows to design a workflow to linearize the dual-input DPA obtaining high efficiency and reconfigurability.\nIn this work an application of a bio inspired optimization algorithm show how to calibrate the DPD directly at the base-station.<\/p>","protected":false},"excerpt":{"rendered":"
Die Schl\u00fcsselkomponente eines Sendesystems ist der Leistungsverst\u00e4rker, der die Aufgabe hat, das Sendesignal zu verst\u00e4rken, damit ein gro\u00dfes Gebiet abgedeckt werden kann. Aufgrund des hohen nichtlinearen Verhaltens der Leistungsverst\u00e4rker werden nichtlineare Verzerrungen im Ausgangssignal erzeugt. Diese Verzerrungen k\u00f6nnen zu hohen Bitfehlerraten im Empfangssystem f\u00fchren und benachbarte Kan\u00e4le st\u00f6ren oder blockieren. Um den genannten Problemen zu […]<\/p>\n","protected":false},"featured_media":2404,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[53],"product_tag":[],"class_list":{"0":"post-1766","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-fau-studien-aus-der-elektrotechnik","7":"has-post-title","8":"has-post-date","9":"has-post-category","10":"has-post-tag","11":"has-post-comment","12":"has-post-author","13":"","15":"first","16":"instock","17":"taxable","18":"shipping-taxable","19":"purchasable","20":"product-type-simple"},"acf":{"autor":"Donati, Giovanni","orcid":"","ror":"","herausgeber":"","orcid_hrsg":"","rorhrsg":"","bearbeiter":"","sonstige_beteiligte_personen":"","untertitel":"A physically motivated approach","zusatz":"","jahr":"2017","zeitschrift":"","serie":"","serie_name":"","serie_band":"","serie_jahr":"","serie_titel_band":"","vortrage":"","issn":"","isbn":"","isbn13":"978-3-96147-080-8","seiten":"x, 117","sonstiges":"","band":11,"auflage":"","opus":9352,"dspace":"9352","e-isbn_pdf":"978-3-96147-081-5","doi":"https:\/\/doi.org\/10.25593\/978-3-96147-081-5","epub":"","e-isbn_epub":"","doi_epub":"","html":"","e-isbn_html":"","doi_html":"","e-isbn_reader":"","doi_reader":"","digibib":"","urn":"urn:nbn:de:bvb:29-opus4-93520","supplementary_material":"","sprache":["Englisch"],"ausgabe":"Softcover","suche":" 9783961470808 9783961470815 ","lizenz":"BY-NC-ND-4","bemerkung":""},"builder_content":"","_links":{"self":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product\/1766","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/comments?post=1766"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/media\/2404"}],"wp:attachment":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/media?parent=1766"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_brand?post=1766"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_cat?post=1766"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_tag?post=1766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}