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Publications by Type: Conference and Workshop Publications

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Effect of Interfering Users on the Modulation Order and Code Rate for UWB Impulse-Radio Bit-Interleaved Coded M-ary PPM
Citation key ML-EIUMCUWBIBCM-05
Author Merz, Ruben and Le Boudec, Jean-Yves
Title of Book Proceedings of the Second International Conference on Broadband Networks (Broadnets '05)
Pages 1156–1162
Year 2005
ISBN 0-7803-9276-0
DOI http://dx.doi.org/10.1109/ICBN.2005.1589738
Location Boston
Month October
Note Invited paper
Abstract We consider the impact of multi-user interference on a bit-interleaved coded-modulation system with M-ary PPM (BIC M-ary PPM) in an impulse-radio ultra-wideband physical layer. In a realistic scenario such as an ad hoc network, the interference is inherently variable. This justifies the need for a physical layer that can optimally adapt its transmission parameters to the interference level. We use puncturing on the channel code so that we can not only change the modulation order $M$ but also the channel code rate. We study by simulation how the optimal combination of modulation order $M$ and channel code rate behaves with various degrees of interference. The results show that BIC M-ary PPM can be successfully adapted to various levels of interference conditions. It also shows the benefit of both rate and modulation adaptation, especially in the presence of multi-user interference.
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