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- P Bithas, N.C. Sagias, P. Takis Mathiopoulos, G. K. Karagiannidis, A. Rontogiannis
- 2005 2nd International Symposium on Wirelessâ€¦
- 2005

In this work, a flexible distribution, called as generalized-K, is used for fading channel modeling. Starting from its probability density function (PDF), useful closed-form expressions for theâ€¦ (More)

- G. K. Karagiannidis, N.C. Sagias, T. Mathiopoulos
- 2005 2nd International Symposium on Wirelessâ€¦
- 2005

A generic distribution, referred to as N* Nakagami, constructed as the product of N statistically independent, but not necessarily identically distributed, Nakagami-m random variables (RV)s, isâ€¦ (More)

- G.C. Alexandropoulos, N.C. Sagias, Kostas Berberidis
- IEEE Antennas and Wireless Propagation Letters
- 2007

An efficient approximation for the multivariate Weibull distribution with arbitrary correlations is presented. By approximating the Gaussian correlation matrix with a Green's matrix, a usefulâ€¦ (More)

- N.C. Sagias, G. K. Karagiannidis, P Bithas, P. Takis Mathiopoulos
- VTC-2005-Fall. 2005 IEEE 62nd Vehicularâ€¦
- 2005

Ascertaining on the suitability of the Weibull model to describe fading channels, a theoretical framework for the multivariate Weibull distribution, generated from correlated Gaussian elements, isâ€¦ (More)

- D.A. Zogas, G. K. Karagiannidis, N.C. Sagias, T.A. Tsiftsis, P. Takis Mathiopoulos, S.A. Kotsopoulos
- 2004 IEEE 59th Vehicular Technology Conferenceâ€¦
- 2004

We study the performance of dual-hop wireless communications systems with non-regenerative relays over Nakagami-m fading channels. Deriving tight upper bounds for the end-to-end SNR, importantâ€¦ (More)

- N.C. Sagias, G. K. Karagiannidis, D.A. Zogas, P. Takis Mathiopoulos, S.A. Kotsopoulos, G. S. Tombras
- 2004 IEEE 59th Vehicular Technology Conferenceâ€¦
- 2004

The performance of L-branch equal-gain combining (EGC) and maximal-ratio combining (MRC) receivers operating over correlative, non-identical Weibull fading channels is studied. Closed-formâ€¦ (More)

- P Bithas, G. K. Karagiannidis, N.C. Sagias, D.A. Zogas, P. Takis Mathiopoulos
- VTC-2005-Fall. 2005 IEEE 62nd Vehicularâ€¦
- 2005

In this paper the performance of dual-branch diversity receivers operating over correlated Rician fading channels is analyzed and novel performance evaluation results are presented. By representingâ€¦ (More)

- N.C. Sagias, P. Takis Mathiopoulos, P Bithas, G. K. Karagiannidis
- 2005 2nd International Symposium on Wirelessâ€¦
- 2005

A versatile envelope distribution which may be useful for both terrestrial and satellite fading channel modelling is the generalized Gamma (GG) distribution. By considering the product of N GG randomâ€¦ (More)

- Z.G. Papadimitriou, N.C. Sagias, P Bithas, P. Takis Mathiopoulos, Lazaros Merakos
- 2006 International Workshop on Satellite andâ€¦
- 2006

In this paper an analytical framework for analyzing the arbitrarily correlated trivariate Weibull distribution is introduced. For this distribution infinite series representations for the jointâ€¦ (More)

- Z.G. Papadimitriou, P Bithas, P. Takis Mathiopoulos, N.C. Sagias, Lazaros Merakos
- 2007 3rd International Workshop on Signal Designâ€¦
- 2007

In this paper a performance analysis of triple-branch maximal ratio combining (MRC) diversity receivers operating over an arbitrarily correlated Weibull fading environment is presented. For theâ€¦ (More)