1 Department of Electronic Systems, The Technical Faculty of IT and Design, Aalborg University, VBN2 The Faculty of Engineering and Science (TECH), Aalborg University, VBN3 Antennas, propagation and radio networking, The Technical Faculty of IT and Design, Aalborg University, VBN4 Multimedia Information and Signal Processing, The Technical Faculty of IT and Design, Aalborg University, VBN
In this paper feedback in LT codes is investigated. The considered type of feedback is acknowledgments, where information on which symbols have been decoded is given to the transmitter. Our analysis reveals that acknowledgments has a very low potential in LT codes with standard degree distributions. Motivated by this, we analyze the impact of acknowledgments on multi-layer LT codes. In this case, feedback proves advantageous. By using only a single feedback message, it is possible to achieve a significant performance improvement compared to traditional LT codes.
Ieee Vehicular Technology Conference, 2012
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I E E E V T S Vehicular Technology Conference. Proceedings