Adaptive RLMS algorithm for antenna array beamforming

Srar, Jalal Abdulsayed

doi:10.1109/tencon.2009.5396256

Cited by 15 publications

(12 citation statements)

References 7 publications

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“…Unbiased impulse response-based least mean square algorithm is presented in [13]. Performance of RLS and LMS is analyzed and a new method which combines both the algorithms is called RLS adaptive beamformer has been devised in [14][15][16]. RLS algorithm has better convergence rate as compared to LMS algorithm, but its computational complexity for multiple input multiple output (MIMO) is large.…”

Section: Normalized Lms (Nlms) Algorithmmentioning

confidence: 99%

Adaptive beamformers using 2D-novel ULA for cellular communication

Dakulagi

Alagirisamy

2019

SN Appl. Sci.

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This paper presents the use of a novel two dimensional (2D) uniform linear array for adaptive beamforming algorithms. We used this novel antenna configuration to study the popular adaptive beamforming algorithms, namely, least mean square algorithm (LMS) and least normalized mean square algorithm (NLMS) and also proposed a variable step-size NLMS (VSSNLMS) algorithm. These beamformers are named as 2D-LMS, 2D-NLMS and 2D-VSSNLMS algorithms respectively. These algorithms not only improve the convergence rate but also mitigates the effect of interference by producing deep nulls in the interference directions. These algorithms are suitable for low-power, low-cost, anti-interference MIMO-WLAN, WiMAX, 4G LTE and other advanced communication systems. systems in [7], mobile communication systems in [8] and satellite-to-satellite systems in [9].

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Section: Normalized Lms (Nlms) Algorithmmentioning

confidence: 99%

Adaptive beamformers using 2D-novel ULA for cellular communication

Dakulagi

Alagirisamy

2019

SN Appl. Sci.

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“…O rastreamento do sinal depende exclusivamente do algoritmo de conformação de feixe. Dentre eles, pode-se destacar os algoritmos da classe LMS e RLS, e inclusive a combinação RLMS (Srar, 2009). Nos últimos anos, vários pesquisadores (Bershad, 2008), (Candido, 2008), têm investigado como melhorar a convergência do LMS, RLS e suas variantes afim de reduzir a complexidade com base no filtro adaptativo.…”

Section: Introductionunclassified

“…Motivado pelo esquema de gradiente estocástico − (Cândido et al, 2010) e pelo resultado apresentado em (Srar et al, 2009), destaca-se o uso da combinação afim nos algoritmos clássicos RLS e LMS para um maior número de elementos no arranjo de antenas e variação da relação sinal ruído mais interferência.…”

Section: Introductionunclassified

Um Algoritmo RLS-LMS Usando Combinação Afim De Filtros Adaptativos Para Conformação De Feixe Em Antenas Inteligentes

Ribeiro

Silva

Souza

et al. 2019

Anais Do 14º Simpósio Brasileiro De Automação Inteligente

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In this paper, we show the convergence aspects of LMS (least mean-square) and RLS (least mean-square) algorithms using an affine combination of filters to adaptive beamforming in smart antennas. Specifically, we present the performance investigation of an affine combination of two individual adaptive filters of different classes, considering the mixture parameter of the combination calculated adaptively through the stochastic gradient algorithm, called of-LMS. The aim of the combination is to obtain, in stationary environment, an RLS-LMS adaptive algorithm that outperforms the classic algorithms in terms of convergence speed. The performance of the proposed affine RLS-LMS algorithm is assessed through computational experiments.

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“…Se prueba su capacidad de filtrado para diferentes arreglos de antenas y su habilidad de generar el lóbulo de radiación principal hacia el Ángulo de Arribo Deseado (AAD). Finalmente, el análisis del costo computacional determina la cantidad de recursos utilizados en su proceso de cálculo frente a otros esquemas en cascada (Srar y Chung, 2009;Orozco et al, 2013) que utilizan filtros MCP y RMC. A continuación se detalla la organización del artículo.…”

Section: Introductionunclassified

Filtro Híbrido Adaptativo en Cascada para Arreglos Lineales Uniformes de Antenas

2014

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* Autor a quien debe ser dirigida la correspondencia.Recibido Nov. 22, 2013; Aceptado Ene. 29, 2014; Versión final recibida Mar. 14, 2014 Resumen Este artículo propone un nuevo esquema de filtro híbrido adaptativo en cascada basado en los algoritmos de mínimos cuadrados promediados y recursivo de mínimos cuadrados para arreglos lineales uniformes de antenas para generar lóbulos de radiación. Los bloques adaptativos individuales usados para formar el nuevo filtro son interconectados a través del factor de arreglo lineal para simular un arreglo virtual de antenas y fijar la dirección deseada del lóbulo principal. La formulación completa del nuevo filtro se detalla y su capacidad de minimizar los efectos debidos a señales de interferencia y ruido blanco gaussiano aditivo es evaluada mediante simulación y comparada con otros filtros. Los resultados de la simulación mostraron que la rapidez de convergencia y las características de filtrado del nuevo modelo son mejores o similares a las de aquellos que lo constituyen. Se concluye que el nuevo esquema puede generar el lóbulo principal hacia la dirección de la señal deseada. Palabras clave: arreglo lineal de antenas, filtros adaptativos en cascada, filtros híbridos, lóbulo de radiación, minimización de interferencias Adaptive Hybrid Filter in Cascade for Uniform Linear Antenna Arrays AbstractThis paper proposes a new adaptive hybrid filter scheme based on the least mean square and the recursive least square algorithms for uniform linear antenna arrays to generate radiation beam patterns. The individual adaptive blocks used to form the new filter are interconnected by the linear array factor to simulate a virtual antenna array and to set the desired direction of the main beam pattern. The completed formulation of the new filter is detailed and its capability to minimize interference signals and adaptive white gaussian noise is evaluated by simulation and compared with other filters. The simulation results showed that the convergence speed and the filtering characteristics of the new model are better or similar to those that make it. In conclusion, the new scheme can generate the main beam pattern to the desired signal direction.

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Adaptive RLMS algorithm for antenna array beamforming

Cited by 15 publications

References 7 publications

Adaptive beamformers using 2D-novel ULA for cellular communication

Adaptive beamformers using 2D-novel ULA for cellular communication

Um Algoritmo RLS-LMS Usando Combinação Afim De Filtros Adaptativos Para Conformação De Feixe Em Antenas Inteligentes

Filtro Híbrido Adaptativo en Cascada para Arreglos Lineales Uniformes de Antenas

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