4 research outputs found

    Formaci贸n de Haz Adaptativo para Objetos M贸viles usando Algoritmos Gen茅ticos

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    聽Context: This works investigates the use of Genetic Algorithm (GA) for beamforming on a Code Division Multiple Access (CDMA) environment under different Signal-to-Noise Ratios (SNR), assuming a reference signal is known.Method: The GA is a method inspired in evolutionary principles to optimize an objective function by choosing the best candidates of a population. The population is randomly generated to ensure high diversity and get a global optimization. On the other hand, the Least Means squares (LMS) algorithm is an adaptive algorithm with guaranteed convergence as long as a reference signal is known.Results: The GA converged faster than the LMS in all tested scenarios. Besides, GA achieved best results in pointing the beam for uncorrelated static sources. Additionally, proper tuning of GA parameters allowed fast convergence and improved tracking of moving targets.Conclusions: The simulation results confirm that the GA is able to obtain a convergent and accurate tool for beamforming and tracking of moving targets, given a reference signal. Hence, GA turns to be promising in replacing LMS on Smart Antenna Systems for increasing channel capacity.Contexto: En este trabajo se investiga el uso de un Algoritmo Gen茅tico (GA) para la conformaci贸n del haz de un arreglo de antenas en ambientes de Acceso M煤ltiple por Divisi贸n de C贸digo (CDMA) bajo diferentes relaciones Se帽al a Ruido, asumiendo que la se帽al de referencia es conocida.M茅todo: El Algoritmo Gen茅tico es un m茅todo inspirado en principios evolutivos, usado para optimizar una funci贸n objetivo seleccionando los mejores candidatos de una poblaci贸n. La poblaci贸n es generada aleatoriamente para asegurar alta diversidad y conseguir una optimaci贸n global. Por otro lado, el algoritmo LMS es un algoritmo que garantiza la convergencia siempre y cuando la se帽al de referencia sea conocida.Resultados: El GA converge m谩s r谩pidamente en que el algoritmo LMS en todos los escenarios probados. Adem谩s, el GA consigui贸 mejores resultados apuntando el haz para fuentes est谩ticas descorrelacionadas. Adicionalmente, una apropiada selecci贸n de los par谩metros del GA permite una mayor 聽velocidad de convergencia y un mejorado rastreamiento de fuentes en movimiento.Conclusiones: Los resultados de las simulaciones confirman que el GA es una herramienta capaz de obtener una convergencia y precisi贸n en la conformaci贸n del haz y el rastreamiento de fuentes en movimiento dada una se帽al de referencia. Por lo tanto, el GA resulta prometedor para sustituir el algoritmo LMS en sistemas de antenas inteligentes y aumentar la capacidad del canal

    Adaptive Beamforming for Moving Targets Using Genetic Algorithms

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    Context: This works investigates the use of Genetic Algorithm (GA) for beamforming on a Code Division Multiple Access (CDMA) environment under different Signal-to-Noise Ratios (SNR), assuming a reference signal is known. Method: The GA is a method inspired in evolutionary principles to optimize an objective function by choosing the best candidates of a population. The population is randomly generated to ensure high diversity and get a global optimization. On the other hand, the Least Means squares (LMS) algorithm is an adaptive algorithm with guaranteed convergence as long as a reference signal is known. Results: The GA converged faster than the LMS in all tested scenarios. Besides, GA achieved best results in pointing the beam for uncorrelated static sources. Additionally, proper tuning of GA parameters allowed fast convergence and improved tracking of moving targets. Conclusions: The simulation results confirm that the GA is able to obtain a convergent and accurate tool for beamforming and tracking of moving targets, given a reference signal. Hence, GA turns to be promising in replacing LMS on Smart Antenna Systems for increasing channel capacity

    Formaci贸n de Haz Adaptativo para Objetos M贸viles usando Algoritmos Gen茅ticos

    No full text
    聽Context: This works investigates the use of Genetic Algorithm (GA) for beamforming on a Code Division Multiple Access (CDMA) environment under different Signal-to-Noise Ratios (SNR), assuming a reference signal is known.Method: The GA is a method inspired in evolutionary principles to optimize an objective function by choosing the best candidates of a population. The population is randomly generated to ensure high diversity and get a global optimization. On the other hand, the Least Means squares (LMS) algorithm is an adaptive algorithm with guaranteed convergence as long as a reference signal is known.Results: The GA converged faster than the LMS in all tested scenarios. Besides, GA achieved best results in pointing the beam for uncorrelated static sources. Additionally, proper tuning of GA parameters allowed fast convergence and improved tracking of moving targets.Conclusions: The simulation results confirm that the GA is able to obtain a convergent and accurate tool for beamforming and tracking of moving targets, given a reference signal. Hence, GA turns to be promising in replacing LMS on Smart Antenna Systems for increasing channel capacity.Contexto: En este trabajo se investiga el uso de un Algoritmo Gen茅tico (GA) para la conformaci贸n del haz de un arreglo de antenas en ambientes de Acceso M煤ltiple por Divisi贸n de C贸digo (CDMA) bajo diferentes relaciones Se帽al a Ruido, asumiendo que la se帽al de referencia es conocida.M茅todo: El Algoritmo Gen茅tico es un m茅todo inspirado en principios evolutivos, usado para optimizar una funci贸n objetivo seleccionando los mejores candidatos de una poblaci贸n. La poblaci贸n es generada aleatoriamente para asegurar alta diversidad y conseguir una optimaci贸n global. Por otro lado, el algoritmo LMS es un algoritmo que garantiza la convergencia siempre y cuando la se帽al de referencia sea conocida.Resultados: El GA converge m谩s r谩pidamente en que el algoritmo LMS en todos los escenarios probados. Adem谩s, el GA consigui贸 mejores resultados apuntando el haz para fuentes est谩ticas descorrelacionadas. Adicionalmente, una apropiada selecci贸n de los par谩metros del GA permite una mayor 聽velocidad de convergencia y un mejorado rastreamiento de fuentes en movimiento.Conclusiones: Los resultados de las simulaciones confirman que el GA es una herramienta capaz de obtener una convergencia y precisi贸n en la conformaci贸n del haz y el rastreamiento de fuentes en movimiento dada una se帽al de referencia. Por lo tanto, el GA resulta prometedor para sustituir el algoritmo LMS en sistemas de antenas inteligentes y aumentar la capacidad del canal

    Adaptive Beamforming for Moving Targets Using Genetic Algorithms<br><br><i>Formaci贸n de Haz Adaptativo para Objetos M贸viles usando Algoritmos Gen茅ticos</i>

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    Abstract Context: This works investigates the use of Genetic Algorithm (GA) for beamforming on a Code Division Multiple Access (CDMA) environment under different Signal-to-Noise Ratios (SNR), assuming a reference signal is known. Method: The GA is a method inspired in evolutionary principles to optimize an objective function by choosing the best candidates of a population. The population is randomly generated to ensure high diversity and get a global optimization. On the other hand, the Least Means squares (LMS) algorithm is an adaptive algorithm with guaranteed convergence as long as a reference signal is known. Results: The GA converged faster than the LMS in all tested scenarios. Besides, GA achieved best results in pointing the beam for uncorrelated static sources. Additionally, proper tuning of GA parameters allowed fast convergence and improved tracking of moving targets. Conclusions: The simulation results confirm that the GA is able to obtain a convergent and accurate tool for beamforming and tracking of moving targets, given a reference signal. Hence, GA turns to be promising in replacing LMS on Smart Antenna Systems for increasing channel capacity
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