6 month Internship with Railenium
Demonstration of cognitive radio capabilities with NI SDR boards in the Railway context
Location: Ifsttar F-59650 Villeneuve d’Ascq
Tutors: Marion Berbineau (Ifsttar), Iyad Dayoub (UVHC), Emilie Masson (Railenium)
Context and objectives: In the context of the European project X2RAIL-1 within the Shift2rail framework at European Level, Railenium research and developments are focusing on the development of adaptable communications resilient to technology evolution and to interferences able to answer the railway needs.
In this context we push the development and demonstration of cognitive radio features. A cognitive radio system is able to sense and understand its operational electromagnetic environment and to adjust dynamically and autonomously all its radio parameters to cope with interferences or the presence of a primary user in the band. The aim of the internship is to demonstrate this cognitive capability in a MIMO context using USRP RIO boards from National Instrument and Labview.
The idea of the internship is to implement various existing spectrum sensing algorithms and to pilot with Labview the several USRP RIO boards available to implement the following scenario to develop a laboratory demonstrator with LTE like signals in a large frequency bands.
- Transmit a signal in a given band
- Sense all the available frequency bands for next transmission
- Detect the presence of primary user or interference
- Transmit the signal in a different frequency band
The demonstrator will use specific antennas develop for the project.
In a previous internship, several short band spectrum sensing algorithms have been implemented in NI USRP-2901 boards. The first part of the work will be to implement these algorithms in the USRP RIO boards.
Then, using a sliding window, the performance of these algorithms will be evaluated.
In a second step a wide band spectrum sensing algorithms will be also consider.
The time needed for spectrum sensing stage should be evaluated in order to define the exact scenario for the demonstrator.
Then the transmission part based on LTE like signals should be implemented on two boards. We will consider the possibility to use the LTE framework from NI or other solution. One board will be considered as the transmitter/receiver, the other one will simulate the primary user or the interferer.
The possibility to use other hardware equipment (CMW 500 form R&S) will be also considered as well as the possible connexion with a simulated LTE network (OPNET or OpenAir Interface).
Main skills : Wireless communications, signal processing, informatics, Labview, Matlab, very good level of English, writing, knowledge of Railway domain will be a plus
Kow-how : Autonomy, sense of initiative, Excellent relationship, rigor, taste for experiments