AG Kommunikationstheorie


Distributed Spectrum Estimation Based on Alternating Mixed Discrete-Continuous Adaptation


This presentation describes a distributed alternating mixed discrete-continuous (DAMDC) technique that approaches the optimal "oracle" solution that consists of solving a mixed continuous-discrete optimization problem using a diffusion strategy for general parameter estimation or spectrum estimation over sensor networks. A least mean squares (LMS) type algorithm that obtains the oracle adaptively is developed and compared with the existing approaches. The proposed algorithm exhibits improved performance in terms of mean square deviation and power spectrum estimation accuracy over existing suboptimal solutions. Numerical results show that the DAMDC algorithm achieves excellent performance.


Rodrigo C. de Lamare received his Diploma in electronic engineering from the Federal University of Rio de Janeiro in 1998 and the MSc and PhD degrees in electrical engineering from the Pontifical Catholic University of Rio de Janeiro (PUC-Rio) in 2001 and 2004, respectively. Since January 2006, he has been with the Communications Group, Department of Electronics, University of York, United Kingdom, where he is a Professor. Since April 2013, he has also been a Professor at PUC-RIO. Dr de Lamare is a senior member of the IEEE and an elected member of the IEEE Signal Processing Theory and Method Technical Committee. He currently serves as editor for IEEE Transactions on Communications, IEEE Wireless Communications Letters, and as a senior area editor for the IEEE Signal Processing Letters. His research interests lie in communications and signal processing, areas in which he has published over 400 papers in international journals and conferences.

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