Obiettivo Multi-carrier (MC) transmission, in particular orthogonal frequency division multiplexing (OFDM), is employed in various systems mainly due to its robustness. In particular, with the deployment of WiMAX (and the upcoming LTE) systems, research in OFDM hastened. In OFDM systems, smart antenna systems with multiple transmit and receive antennae and location estimation are likely to be an area of interest. In recent years, adaptive antennae and array processing greatly impacted the performance of wireless communication systems. Also, location based services are gaining importance everyday increasing the need for better location estimation algorithms. In this work, we propose to investigate one of the most essential issues of adaptive antenna systems: the estimation of angles of arrival (AOA) for OFDM systems and its utilization in location estimation and development of location based services. The main advantage for location estimation using angles compared to distance (timing advance) is that instead of three reference points, only two reference points are sufficient. In our work, we propose to use basis selection (BS) algorithms, namely the matching pursuit (MP) algorithms for AOA and location estimation, by exploiting the sparsity property of AOA for OFDM. The main advantages of applying BS algorithms to this estimation problem are the decreased complexity and increased resolution. When OFDM systems are compared to single carrier systems in terms of AOA estimation, the main advantage is that for each subcarrier, the received phase depending on the angle of arrival is different. This results in diversity in the angle of arrival equations. In this work, we will also concentrate on the advantage of this diversity and its improvement on the accuracy of location estimation systems as well as the location based services that can be developed based on the obtained accuracy levels. Parole chiave Angle of Arrival Basis Selection Algorithms LTE Location Estimation Location based services MIMO Matching Pursuit Multi Antenna systems Multicarrier Systems OFDM Radio engineering WiMAX Programma(i) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Argomento(i) PEOPLE-2007-4-3.IRG - Marie Curie Action: "International Reintegration Grants" Invito a presentare proposte FP7-PEOPLE-IRG-2008 Vedi altri progetti per questo bando Meccanismo di finanziamento MC-IRG - International Re-integration Grants (IRG) Coordinatore ISTANBUL TEKNIK UNIVERSITESI Contributo UE € 18 493,15 Indirizzo AYAZAGA KAMPUSU 34469 Maslak, Istanbul Turchia Mostra sulla mappa Regione İstanbul İstanbul İstanbul Tipo di attività Higher or Secondary Education Establishments Contatto amministrativo Sevgi Ural (Ms.) Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Costo totale Nessun dato Partecipanti (1) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto TURKCELL ILETISIM HIZMETLERI A.S. Partecipazione conclusa Turchia Contributo UE € 31 506,85 Indirizzo MESRUTIYET CADDESI TURKCELL PLAZA 71 34430 Tepebasi, Istambul Mostra sulla mappa Regione İstanbul İstanbul İstanbul Tipo di attività Private for-profit entities (excluding Higher or Secondary Education Establishments) Contatto amministrativo Sevgi Ural (Ms.) Collegamenti Contatta l’organizzazione Opens in new window Costo totale Nessun dato