Beamforming distribuído baseado em inversão remota de fase: Uma prova de conceito em GNU-Radio/USRP

Angilberto Muniz Sobrinho, Edmar Candeia Gurjão, J. S. Rocha Neto

DOI: 10.14209/SBRT.2020.1570651733

Evento: XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2020)

Keywords: Beamforming Redes de Sensores Sincronismo Software Defined Radio

Abstract

In wireless sensor networks distributed beamforming is a cooperative technique to improve the received signal quality. In this work is proposed an open-loop distributed beamforming method for carrier phase alignment at receiving destination. The approach is inspired in Retrodirective Antenna Array and is based on the phase-conjugate of a pilot (beacon) signal sent from the Master Base Station to the remote sensors nodes. A GNU Radio based experiment was implemented to validate the concept, and the obtained results shows better stability and lower latency of the proposed method compared to Time-slotted Round Trip synchronization method.

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