Musiige, Deogratius

Denne afhandling introducerer en ny tilgang til emulering af RF subsystemets strømforbrug. RF subsystemet, som består af analoge komponenter, er ikke blevet dækket af nuværende emulerings metoder, der er kompatible med digitale kredsløber. Selvom evalueringen af RF subsystemers arkitekturer afslørede adskillige arkitekturer med forskellige virkninger på strømforbrug, har vi besluttet at betragte RF subsystemet som en sort boks.Emuleringen af RF subsystemets strømforbrug er blevet undersøgt for telekommunikationsteknologi “Long Term Evolusion (LTE)”. I betragtning af at de store strømforbruge af trådløse enheder er stort set funktioner af sekvenser af protokol /logiske aktiviteter, det er denne teknologi, der fastsat input til RF subsystemet. Disse input er transmissionsstyrke, frekvens og signal båndbredde og det fysiske miljø variable temperatur som også har vist sig til at have en stor indflydelse på strømforbruget. Disse input udgør også de input parametre til emulering metodologien.Emulering metodologien har vist sig at være en matematisk mapping mellem input parametre og et foruddefineret matematisk model. For at finde matematiske modelet, blev multivariabel modelleringsmetoder analyseret for en model med mindste modellering fejl og kompleksitet. Heri “homotopy continuation” numeriske tilgang viste sig at have den mindste modellering fejl på 3%. RF subsystemets strømforbrug er blevet emuleret med nøjagtigheder af 84% ±2.25% og 94% ±2.25% på forskellige enheder.The thesis introduces a novel approach towards the emulation of the RF subsystem power consumption when transmitting a LTE signal. The RF subsystem which is made up of analog components has not been covered by the status quo emulation methodologies which are compatible with digital circuits. Though the study of the RF subsystem architectures revealed numerous architectures with different impacts on power consumption, we have decided to consider the RF subsystem as a black box.The RF subsystem power emulation has been studied for the telecommunication technology Long Term Evolusion (LTE). Given the fact that major power consumptions of wireless devices are largely functions of sequences of protocol/ logical activities, it is this technology that provided the inputs to the RF subsystem as a black black box which are Tx power, carrier frequency and signal bandwidth. The physical environmental variable temperature has also proven to be very influential on power consumption. These inputs also do constitute to the input parameters of the emulation methodology. The emulation methodology has been proven to be a mathematical mapping between the input parameters and a predefined mathematical model. For the mathematical model, multivariate modeling approaches were analyzed for an approach with the least modeling error and complexity. Herein, the homotopy continuation numerical approach proved to have the least modeling error of 3%. The RF subsystem power consumption has been emulated with accuracies of 84% ±2.25% and 94.3% ±2.25% on different devices

Online Research Database In Technology

RF subsystem power consumption and induced radiation emulation

http://orbit.dtu.dk/ws/files/91407414/phd304_Musiige_D.pdf

RF subsystem power consumption and induced radiation emulation

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Online Research Database In Technology