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A novel joint channel and multi-user interference statistics estimator for UWB-IR based on Gaussian mixture model

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2 Author(s)
Cellini, V. ; Dipartimento di Ingegneria dell''Informazione, Padova Univ., Italy ; Dona, G.

Ultra-wideband impulse radio communications have been growing rapidly over the last few years, as a promising technique for high bit-rate and multi-user transmissions over the 3-10 GHz unlicensed spectrum. In literature, multi-user interference is often approximated with a white Gaussian process and embodied in the overall noise term. However, it has been found that, in typical indoor environments, such approximation is inadequate. In this paper, we propose a new approach to characterize the interference, based on the Gaussian mixture model, which allows to derive a joint channel and multi-user interference statistics estimator, based on the iterative space-alternating generalized expectation maximization algorithm. The effectiveness of the proposed estimator is shown by means of numerical examples.

Published in:

Ultra-Wideband, 2005. ICU 2005. 2005 IEEE International Conference on

Date of Conference:

5-8 Sept. 2005