Real Time Implementation of Automatic Digital Modulation-Based SNR Estimation Using SDR Platforms

The aim of this paper is to create an autonomous reconfigurable radio communication system that can produce an adequate transmission rate according to propagation medium fluctuation while maintaining a higher quality of service (QoS). In this work, we have achieved an experimental implementation of adaptive modulation technique using SDR platforms as USRP B210, RTL-SDR and HackRF One. The implemented system provides a real time data communication equipped by an adaptive modulation techniques. The system autonomously chooses the most suitable modulation among BPSK, QPSK and 8-PSK based on the estimation of link quality measured by the signal to noise ratio (SNR).