[Tccc] Postdoc position at INSA Lyon
Guillaume VILLEMAUD
guillaume.villemaud
Mon Sep 5 11:35:00 EDT 2011
*Postdoc position**: Optimisation of a radio propagation tool for indoor
and indoor/outdoor radio network planning and optimisation.*
Supervisors: Guillaume Villemaud / Jean-Marie Gorce
Place: CITI Lab -- INSA Lyon - France
_Description:_
In the framework of the iPLAN European project the aim of this postdoc
is to enhance the computational efficiency and to adjust the
complexity-accuracy trade-off of the MR-FDPF (Multi-Resolution Frequency
Domain Partial Flows) method for indoor radio coverage prediction. This
method, particularly efficient for indoor propagation, is devoted to be
implemented in a radio network planning tool. This tool needs to propose
all kind of modern radio link conditions: indoor, outdoor, indoor to
outdoor, outdoor to indoor, for 3G/4G, WLAN or WMAN (WiMax), from
macrocells to femtocells.
The first constraint this work should take care is the computational
complexity at which target accuracy can be achieved. The discrete based
approach from which our work will be derived is the Multi-Resolution
Frequency Domain Partial Flows (MR-FDPF) method that was previously
developed at INSA-LYON. This method exhibits very good properties for
Indoor prediction but in turns may suffer from a high complexity in full
3D environments. To alleviate this limit, we will have to reduce the
mathematical complexity of the method at the price, if needed, of a
lower accuracy. In this project, the proposed approach relies on a
multi-resolution decomposition of the problem that requires several
matrix inversions. How to reduce computational complexity due to matrix
inversion is critical. In this project, the reduction of the complexity
will be achieved by subspace projection and singular value decomposition
(SVD).
Another goal of this work is to integrate in this tool some statistical
analysis of the radio link which is developed in the laboratory.
Frequency, time and space domain statistics could be extract from
simulations to give more information on possible radio performance.
Moreover, MIMO system evaluation has to be implemented.
Thus, the study will contain three main parts:
-computational efficiency enhancement of the MR-FDPF method;
-implementation of statistical analysis of radio channel behaviour
rather than only considering mean power level and MIMO performance;
-validation with measurement campaigns
The postdoc candidate will work in the CITI Lab of INSA Lyon in order to
propose all possible enhancements on the MR-FDPF method and will be
associated to the Airelle INRIA project team.
References:
[1] G. de La Roche, K. Jaffres-Runser and J-M. Gorce. "On
predicting Indoor WLAN coverage with a fast discrete approach,"
International Journal of Mobile Network Design and Innovation. Vol 2, No
1, 2007, pp.3-12.
[2] J-M. Gorce, K. Jaffres-Runser and G. De La Roche.
"Deterministic Approach for Fast Simulations of Indoor Radio Wave
Propagation," IEEE Transactions on Antennas and Propagation. Vol 55,
Issue 3, Part 2, March 2007, pp.938-948.
[3]M. Luo, D. Umansky, G. Villemaud, M. Lafort, JM Gorce, Estimating
Channel Fading Statistics based on Radio Wave Propagation Predicted with
Deterministic MRFDPF Method. In EUCAP 2011, Roma, Italy, April 2011.
----------------------------------------------
Guillaume VILLEMAUD, PhD
Associate professor - CITI Laboratory
International Exchange Coordinator- Electrical Engineering Department INSA Lyon, bat. Claude Chappe
6 avenue des Arts
69621 Villeurbanne cedex (France)
Tel : (33) 4 72 43 60 67
Fax : (33) 4 72 43 62 27
Email :guillaume.villemaud at insa-lyon.fr
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