Publication: CARACTERIZACIÓN DE LA GANANCIA POR DIVERSIDAD ANGULAR DE ANTENAS DIRECTIVAS PARA ENLACES EXTERIOR-EXTERIOR EN AMBIENTESURBANOS
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Date
2016
Authors
TEJEDA AGUAYO, MARIO ELÍAS
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Abstract
Este trabajo presenta una comparación empírica de la efectividad de sistemas dediversidad angular y espacial para enlaces inalámbricos fijos de exterior a exterior. Elanálisis se centra principalmente en el desempeño de aquellos sistemas de diversidadcon sólo una cadena de RF. Los resultados muestran que para tales sistemas aquelloscon diversidad angular superan con creces en desempeño a los espaciales por al menos4 [dB] al utilizar arreglos de características comparables. Este estudio es realizado parasistemas angulares con tres órdenes distintos de diversidad, 5, 12 y 20. Se observa undeterioro cercano a los 2 [dB] al ser comparados con el combinador de razón máxima(MRC) correspondiente al sistema óptimo. Esto se compara favorablemente con diversidadespacial donde el deterioro llega a los 10 [dB] para un orden de diversidad de 20.Con el fin de establecer una referencia que permita explicar los resultados observadosse utiliza un modelo de desvanecimientos Rice que incluye los efectos de correlaciónde antena. Entre los resultados se observa que este modelo se ajusta de manera adecuadaa los datos empíricos y permite predecir el desempeño de los distintos sistemas dediversidad presentados.
This work presents an empirically based comparison of the effectiveness of angularand spatial diversity systems for outdoor to outdoor fixed wireless links. The analysisis focused on the performance of systems with only one RF chain. The results showthat angular diversity outperforms spatial diversity systems by at least 4 [dB] whenusing arrays with comparable dimensions. This study is performed for angular diversitysystems with three different orders, 5, 12 and 20. A performance loss of 2 [dB]was observed when comparing with the optimum maximum ratio combiner (MRC). Incontrast a spatial diversity system of order 20 has a performance loss of around 10 [dB].In order to provide a reference for the observed results, a simple Ricean fading modelincluding antenna correlation effects is simulated. This model is found to fit very wellthe main results and then can be used to predict the performance of the different kindof systems analized.
This work presents an empirically based comparison of the effectiveness of angularand spatial diversity systems for outdoor to outdoor fixed wireless links. The analysisis focused on the performance of systems with only one RF chain. The results showthat angular diversity outperforms spatial diversity systems by at least 4 [dB] whenusing arrays with comparable dimensions. This study is performed for angular diversitysystems with three different orders, 5, 12 and 20. A performance loss of 2 [dB]was observed when comparing with the optimum maximum ratio combiner (MRC). Incontrast a spatial diversity system of order 20 has a performance loss of around 10 [dB].In order to provide a reference for the observed results, a simple Ricean fading modelincluding antenna correlation effects is simulated. This model is found to fit very wellthe main results and then can be used to predict the performance of the different kindof systems analized.
Description
Catalogado desde la version PDF de la tesis.
Keywords
ANTENAS DIRECTIVAS , DIVERSIDAD , ENLACES INALAMBRICOS DE EXTERIOR A EXTERIOR , MODELOS DE CANAL
