The USRP-based Visible Light Communication testbed building:

USRP-based Software defined Visible Light Communication testbed

Transmission over optical wireless channel (OWC) is challenging. Optical environment, power consumption requirment and illumination condition decide that different application reuqired different signal processing apporoach of VLC system. So, a reconfigurable/adaptive optical wirless system is on great demand as the traditional fixed and embedded wireless communication system is not viable to cater the needs for frequenctly change requirements of opticial wireless communication system. In our laboratory, SDR-based Transceiver of Visible light communication system using USRP and GUN Radio is developped. This approach allows a different type of communication system requirements such as standard, protocol, or signal processing method, to be deployed by using the same set of hardware and software such as USRP and GNU Radio respectively. For researchers, this approach has opened the door to extend their studies in simulation domain into experimental domain. high re-configurable platform for communication system. This paper presents the SDR-based transceiver of common digital modulation system by means of GNU Radio and USRP.

Light Emitting Fingerprint identification testbed

The security issues of the Internet of Things and wirelessnetworks have also been paid more and more attention.Biometric-based personal identification technology has theadvantages of security. Among them, there aresets of solutions to obtain fingerprints, including optical, tem-perature, acoustic and power, etc. In wireless communicationsystem, Physical-layer (PHY) security has raised high con-cerns. [9]. Wireless device identification via Radio Frequency(RF) fingerprinting extracted from communication signals isa physical layer approach for communication system security[10]. It is possible to identify target device via its uniquefingerprint and access authentication is entirely accomplishedin PHY layer. This PHY fingerprint identification tech-nique has been investigated in wireless WiFi, LTE and Zigbeesystems . We propose a LED device fingerprint defintion and extraction method for visible light communication system.