Demonstration of a USRP-based Communication Network for Internet-of-Things (IOT) Application

Abstract

In this paper, an SDR-based single-carrier, simplex, wireless communication system is presented for Internet-of-Things (IOT) applications. The research work includes the design of both hardware and software such that the system can communicate reliably over a distance of 100 meters. The hardware component of this work includes the complete design and fabrication of the transmitter and receiver front-end PCBs. On the other hand, the software aspect which consists of signal processing is implemented on a software-defined radio where various impairment correction techniques are implemented to mitigate challenges in the wireless channel such as carrier frequency offset, phase offset, and timing offset. Furthermore, an equalization algorithm is implemented to compensate for errors that arise due to the phenomena of multipath fading. To demonstrate the efficacy of the proposed communication system in an indoor environment, an extensive validation test scheme was devised and performed. The proposed communication system demonstrates an optimum spectral efficiency of 3.2 bps/Hz at a bit rate of 26.66 Mbit/s.

Keywords

• signal processing
• equalization
• multipath fading
• software-defined radio
• sdr
• internet of things
• usrp