?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Sonda+de+banda+ancha+para+la+caracterizaci%C3%B3n+del+canal+en+comunicaciones&rft.creator=Calvo+Ram%C3%ADrez%2C+C%C3%A9sar&rft.contributor=Briso+Rodr%C3%ADguez%2C+C%C3%A9sar&rft.subject=Telecommunications&rft.description=El+objetivo+de+este+proyecto+es+dise%C3%B1ar%2C+construir+y+verificar+el+funcionamiento+de+una+sonda+de+canal+de+banda+ancha+habilitada+para+la+caracterizaci%C3%B3n+del+canal+de+comunicaciones+aire-tierra+para+Unmanned+Aerial+Vehicle+(UAV)+de+baja+altura%2C+as%C3%AD+como+para+la+mayor%C3%ADa+de+modelados+de+canal+en+transporte.+A+lo+largo+de+la+memoria+se+detallan+los+desarrollos+te%C3%B3ricos%2C+principios+de+modelado+y+sondeo+de+canal+para+comunicaciones+de+banda+ancha.+Asimismo%2C+se+explica+la+descripci%C3%B3n+y+c%C3%A1lculos+necesarios+para+la+implementaci%C3%B3n+de+los+equipos+que+permiten+modelar+el+canal.+Para+la+caracterizaci%C3%B3n+del+canal+aire-tierra+se+requieren+satisfacer+unos+estrictos+requisitos+tales+como+la+portabilidad%2C+ligereza%2C+fiabilidad+y+f%C3%A1cil+manejo+que+deben+tenerse+en+cuenta+en+el+dise%C3%B1o.+Las+soluciones+comerciales+no+satisfacen+estos+requerimientos%2C+por+lo+que%2C+es+necesario+crear+equipos+a+medida.+Este+proyecto+expone+y+resuelve+los+requisitos+t%C3%A9cnicos+necesarios+que+se+tienen+que+satisfacer+para+la+aplicaci%C3%B3n+demandada.+Los+equipos+se+construyen+y+despu%C3%A9s+se+miden+realizando+pruebas+de+verificaci%C3%B3n+mediante+comparaciones+con+equipos+comerciales.+Los+resultados+muestran+que+los+equipos+creados+ofrecen+medidas+tan+fiables+como+los+equipos+profesionales+de+sondeo+de+canal.+La+tecnolog%C3%ADa+necesaria+para+la+implementaci%C3%B3n+es+principalmente+anal%C3%B3gica+de+radiofrecuencia+ya+que+para+el+desarrollo+se+escoge+usar+una+t%C3%A9cnica+de+sondeo+mediante+la+transmisi%C3%B3n+de+pulsos+estrechos+de+radiofrecuencia.+Se+desarrollan+por+separado+3+equipos%3A+transmisor%2C+receptor+y+posicionador+de+antenas%2C+los+cuales+son+controlados+a+trav%C3%A9s+de+un+software+desarrollado+en+Matlab+para+facilitar+la+sincronizaci%C3%B3n+control+y+procesado+de+los+datos.+Finalmente%2C+se+llevan+a+cabo+medidas+reales+en+UAV+en+los+que+se+ha+obtenido+resultados+muy+satisfactorios.+Con+esto+se+han+publicado+varios+art%C3%ADculos+relacionados+con+el+modelado+de+canal+aire-tierra.+Gracias+a+este+proyecto%2C+las+tareas+de+investigaci%C3%B3n+sobre+propagaci%C3%B3n+de+banda+ancha+se+realizan+de+una+manera+mucho+m%C3%A1s+r%C3%A1pida+y+precisa+que+realizando+simulaciones+deterministas+por+ordenador+con+software+de+trazado+de+rayos+o+usando+caros+y+complejos+equipos+de+medidas.+%0D%0A%0D%0AAbstract%3A+%0D%0A%0D%0AThe+aim+of+this+project+is+to+design%2C+build+and+verify+the+operation+of+a+broadband+channel+sounder+enabled+for+the+characterization+of+the+air-ground+channel+for+low-altitude+UAVs%2C+as+well+for+most+characterizations+in+transport+systems.+In+this+document%2C+the+theoretical+developments%2C+modeling+principles+and+channel+sounding+techniques+for+wideband+communications+are+detailed.+Also%2C+the+description+and+calculations+necessary+for+the+implementation+of+the+equipment+that+allows+modeling+the+channel.+For+the+Air-Ground+channel+characterization%2C+strict+requirements+of+portability%2C+lightness%2C+reliability+and+easy+handling+are+required%2C+which+must+be+taken+into+account+in+the+design.+Commercial+solutions+do+not+meet+these+requirements%2C+thus+it+is+necessary+to+create+custom+equipment.+This+project+specifies+and+resolves+the+technical+requirements+for+the+demanded+application.+The+equipment+is+built+and+measured+by+performing+verification+tests.+The+results+show+that+the+equipments+created+offer+measurements+as+reliable+as+the+professional+channel+sounders.+For+development%2C+The+chosen+sounding+technique+is+the+transmission+of+narrow+radiofrequency+pulses.+The+necessary+technology+for+the+implementation+is+modular+of+radiofrequency%2C+mainly+with+analog+circuits.+Three+devices+are+developed+separately%3A+transmitter%2C+receiver+and+antenna+positioner%2C+which+are+controlled+through+a+software+developed+in+Matlab+to+facilitate+the+synchronization%2C+control+and+data+processing.+Finally%2C+real+measurements+are+carried+out+in+a+UAV+to+test+the+developed+equipment.+Very+satisfactory+results+are+obtained+which+have+allowed+to+publish+some+articles+related+to+the+air-ground+channel+modeling.+Thanks+to+this+project%2C+research+tasks+on+wideband+propagation+are+carried+out+in+a+much+faster+and+more+precise+way+than+by+performing+deterministic+computer+simulations+with+ray+tracing+software+or+using+expensive+and+complex+measurement+equipment.&rft.publisher=E.T.S.I+y+Sistemas+de+Telecomunicaci%C3%83%C2%B3n+(UPM)&rft.rights=https%3A%2F%2Fcreativecommons.org%2Flicenses%2Fby-nc-nd%2F3.0%2Fes%2F&rft.date=2018-07-18&rft.type=info%3Aeu-repo%2Fsemantics%2FbachelorThesis&rft.type=Final+Project&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=spa&rft.rights=info%3Aeu-repo%2Fsemantics%2FopenAccess&rft.identifier=https%3A%2F%2Foa.upm.es%2F53639%2F