Duration Events Of Attenuation
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. ANÁLISE DA DINÂMICA DA ATENUAÇÃO POR CHUVAS EM REGIÕES TROPICAIS / DYNAMIC ANALYSIS OF RAIN ATTENUATION IN TROPICAL REGIONS
The main effect causing non-availability in radio communication systems operating in frequencies above 10GHz, is the rain attenuation, particularly the heavy convective rain that is predominant in tropical regions. This thesis presents a detailed study and modelling of the dynamics of rain attenuation in terrestrial links and earthspace links, based on data
Publicado em: 2008
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2. DEVELOPMENT OF METHODOLOGY FOR CALIBRATING PIEZOELECTRIC TRANSDUCERS USED IN INTERNAL BALLISTICS FOR TRANSIENT PRESSURE MEASUREMENTS / DESENVOLVIMENTO DE METODOLOGIA DE CALIBRAÇÃO DE TRANSDUTOR PIEZELÉTRICO DE PRESSÃO UTILIZADO EM BALÍSTICA INTERNA
The current research, of armaments industry`s interest, more specifically in the quality control of ammunition lots, is related to the development of methodology for calibrating piezoelectric transducers for transient pressure measurements associated with events whose duration is of the order of milliseconds. As its main contribution, this work presents prop
Publicado em: 2004
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3. MODELLING TO RAIN ATTENUATION EFECTS IN POINT-TO-POINT AND POINT-TO-MULTIPOINT TERRESTRIAL LINKS / MODELAMENTO DE EFEITOS DE ATENUAÇÃO POR CHUVAS EM ENLACES TERRESTRES PONTO-A-PONTO E PONTO-MULTIPONTO
The growing demand for broadband services such as high- speed data, video, audio and multimedia, has lead to the use of point-multipoint radio systems operating in frequencies above of 10 GHz, that are not yet allocated for other services and allow the use of the large bandwidths required by these services. At these frequencies, the main contribution for the
Publicado em: 2003
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4. MODELAMENTO DE EFEITOS DE MULTIPERCURSO ATMOSFÉRICO EM ENLACES MICROONDAS EM VISIBILIDADE. / MODELING ATMOSPHERIC MULTIPATH FADING IN LINE-OF-SIGHT MICROWAVE LINKS
Os desvanecimentos por multipercurso atmosférico são a principal causa de degradação do desempenho de enlaces rádio digitais de alta capacidade, acentuando os efeitos do ruído térmico e da interferência intersimbólica na taxa de bits errados. A previsão da distribuição cumulativa de probabilidades destes desvanecimentos em função de parâmetros
Publicado em: 2003