000020498 001__ 20498
000020498 005__ 20150420163921.0
000020498 0247_ $$2urn$$aurn:nbn:ch:rero-004-109410
000020498 0248_ $$aoai:doc.rero.ch:20100917141216-DD$$pthesis$$pthesis_urn$$prero_explore$$punine$$zcdu681$$zcdu34$$zreport$$zbook$$zjournal$$zcdu16$$zpostprint$$zpreprint$$zcdu1$$zdissertation
000020498 041__ $$aeng
000020498 080__ $$a681
000020498 100__ $$aBaracchi-Frei, Marcel
000020498 245__ $$9eng$$aReal-time GNSS software receiver optimized for general purpose microprocessors
000020498 300__ $$a255
000020498 502__ $$92010-07-02$$aThèse de doctorat : Université de Neuchâtel, 2010
000020498 506__ $$ffree
000020498 520__ $$9eng$$aA satellite navigation system (like GPS) allows an user to determine its own position everywhere and anytime on Earth. The process of calculating the position is relatively simple (use of trilateration). The main issue is to obtain and decode the transmitted information and to estimate accurately the Time Of Arrival (TOA) of the signals as they lie below the thermal noise floor. A technique called spread-spectrum has been applied for the transmission of these signals that distributes a narrow-band signal over a large bandwidth with the help of spreading codes. In the receiver, these known sequences (one for every satellite) are re-generated and correlated with the incoming signal. As the satellites are moving, the signals undergo additionally a Doppler frequency shift that also has to be compensated in the receiver. These correlation processes require a huge number of operations which make them difficult to be executed in software.  Current microprocessors and mobile devices (like smartphones and mobile computers) offer more and more processing power and system resources. Therefore, the interest in software receivers increased during the last years as they offer a great level of flexibility and allow a low-cost implementation with few additional components. The aim of this thesis is to develop and implement a real-time software receiver on a general purpose microprocessor. This includes an extensive study of the current state-of-the-art and the development and the implementation of a new signal processing baseband architecture. The requirements and the performance are finally evaluated with simulated and real signals.
000020498 695__ $$9eng$$asatellite navigation ; GPS ; GNSS ; software receiver ; real-time ; microprocessor ; batch processing ; baseband architecture
000020498 700__ $$aFarine, Pierre-André$$eDir.
000020498 700__ $$aBotteron, Cyril$$eCodir.
000020498 8564_ $$f00002162.pdf$$qapplication/pdf$$s10211628$$uhttp://doc.rero.ch/record/20498/files/00002162.pdf$$yorder:1$$zTexte intégral
000020498 918__ $$aFaculté des sciences$$bRue Emile-Argand 11, 2007 Neuchâtel$$cInstitut de microtechnique
000020498 919__ $$aUniversité de Neuchâtel$$bNeuchâtel$$ddoc.support@rero.ch
000020498 980__ $$aTHESIS$$bUNINE$$fTH_PHD
000020498 990__ $$a20100917141216-DD