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Efficient Digital Beamforming for Bluetooth 5.1 Using Software Defined Radio

Abstract:

In this paper, the angle of arrival (AoA) estimation and the implementation of beamforming for the new Bluetooth Low Energy communication standard version 5.1 has been evaluated through Software- defined Radio using a linear array antenna synthesis. The system consists of a 4 × 1 uniform linear array (ULA), a radio frequency (RF) transceiver and an FPGA digital signal processing unit. The proposed system reduces implementation and computational costs. It can be also adjusted for different antenna configurations with a higher number of elements in the array. The linear array antennas designed works at 2.4 GHz ISM operating band. The experiments were carried out in an indoor environment. The experimental results show a high level of precision for the positioning system, an excellent level between the main and side lobes in the radiation patterns, Taylor’s synthesis has been applied to reject the side lobes as well.