{"id":62185,"date":"2018-03-09T22:50:06","date_gmt":"2018-03-09T22:50:06","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/design-of-fft-algorithms-and-architectures-for-wireless-ofdm-communication-systems\/"},"modified":"2018-03-09T22:50:06","modified_gmt":"2018-03-09T22:50:06","slug":"design-of-fft-algorithms-and-architectures-for-wireless-ofdm-communication-systems","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/tecnologia-electronica\/design-of-fft-algorithms-and-architectures-for-wireless-ofdm-communication-systems\/","title":{"rendered":"Design of fft algorithms and architectures for wireless ofdm communication systems"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ainhoa Cortes Vidal <\/strong><\/h2>\n<p>Ofdm es una t\u00e9cnica de modulaci\u00f3n empleada por muchos sistemas de comunicaciones como por ejemplo sistemas dab, dvb, wlan y wman. Las principales ventajas de la t\u00e9cnica ofdm son tiene una gran eficiencia espectral y adem\u00e1s, e robusta en ambientes multitrayecto. En un sistema ofdm, la transformada r\u00e1pida de fourier (fft) y su inversa (ifft) son empleadas para la demodulaci\u00f3n modulaci\u00f3n respectivamente. Estos dos algoritmos son una.De las partes con m\u00e1s carga computacional dentro de un sistema ofdm. As\u00ed, la optimizaci\u00f3n del dise\u00f1o de la fft\/ifft es muy importante para sistemas ofdm. El principal objetivo de este trabajo de investigaci\u00f3n es el dise\u00f1o de algoritmos y arquitecturas de la fft para sistemas de comunicaciones ofdm de una forma eficiente. Este trabajo muestra lo complicado que es tomar una decisi\u00f3n a priori de qu\u00e9 algoritmo, arquitectura e implementaci\u00f3n de la fft\/ifft es el \u00f3ptimo para un sistema ofdm espec\u00edfico. Se propone realizar una b\u00fasqueda del algoritmo, arquitectura e implementaci\u00f3n para optimizar el dise\u00f1o del procesador de la fft\/ifft para cada sistema ofdm. Una notaci\u00f3n matricial es revisada y propuesta en este trabajo como una representaci\u00f3n unificada y m\u00e1s compacta que puede ayudar al dise\u00f1ador en esta b\u00fasqueda. La revisi\u00f3n de la representaci\u00f3n matricial proporciona expresiones generales para representar algoritmos disponibles en la bibliograf\u00eda. Se muestra c\u00f3mo esta notaci\u00f3n matricial compacta da al dise\u00f1ador una r\u00e1pida visi\u00f3n de la implementaci\u00f3n de los algoritmos. Adem\u00e1s, nuevos algoritmos y arquitecturas son propuestas en este trabajo.Esta b\u00fasqueda del algoritmo y de la arquitectura de la fft\/ifft es realizada para dos aplicaciones ofdm: wlan ieee 802.11a y mb-ofdm uwb. Los dise\u00f1os resultantes propuestos de la fft\/ifft son eficientes en t\u00e9rminos de \u00e1rea y potencia consumida.  summary  orthogonal frequency divisi\u00f3n multiplexing (ofdm) isa modulation technique employed by many communication systems such as dab, dvb, wlan and wman systems. The main advantages of the ofdm technique are that it has a high spectral efficiency and that it is robust against multi-path environments. In an ofdm system, the fast fourier transform (fft) and its inverse (ifft) are employed for the demodulation and modulation respectively. These two algorithms are one of the most computationally intensive parts of an ofdm system. Thus, the optimization of the fft\/ifft design is very important for ofdm systems. The main objective of this research work is the design of fft algorithms and architectures for wireless ofdm communication systems in an efficient way. This work shows that it is hard to make an a priori decision on which fft\/ifft algorithm, architecture and implementation is optimal for an specific ofdm system. It is proposed to perform a search across the algorithm, architecture and implementation dimensions to optimize the design of the fft\/ifft processor for each ofdm system. A matricial notation is revised and proposed in this work as a unified and compact representation that can help the designer in this search. The revision of the matricial notation provides general expressions to represent algorithms available in the literature. It is shown how the compact matricial notation gives the designer a quick insight into the implementation. Furthermore, new algorithms and architectures are proposed in this work. This search across the algorithm and architecture dimensions is carried out for two ofdm applications: wlan ieee 802.11a and mb-ofdm uwb. The resulting proposed fft\/ifft cores are efficient in terms of area and power consumption<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Design of fft algorithms and architectures for wireless ofdm communication systems<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Design of fft algorithms and architectures for wireless ofdm communication systems <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ainhoa Cortes Vidal <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Navarra<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/12\/2007<\/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>Igone Velez Isasmendi<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Carlos Bastero de eleizalde <\/li>\n<li>Jos\u00e9 Luis Martin gonzalez (vocal)<\/li>\n<li>Juan  Antonio Montiel nelson (vocal)<\/li>\n<li>ramon Gonzalez carvajal (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ainhoa Cortes Vidal Ofdm es una t\u00e9cnica de modulaci\u00f3n empleada por muchos sistemas de comunicaciones como por 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