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Athanasios A. Rontogiannis
Researcher at ASTRON
Publications - 116
Citations - 2158
Athanasios A. Rontogiannis is an academic researcher from ASTRON. The author has contributed to research in topics: Hyperspectral imaging & Bayesian inference. The author has an hindex of 22, co-authored 114 publications receiving 1948 citations. Previous affiliations of Athanasios A. Rontogiannis include National and Kapodistrian University of Athens & University of Ioannina.
Papers
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Journal ArticleDOI
On the performance analysis of digital communications over generalized-K fading channels
Petros S. Bithas,Nikos C. Sagias,P.T. Mathiopoulos,George K. Karagiannidis,Athanasios A. Rontogiannis +4 more
TL;DR: The performance of digital communication systems over generalized-K (K/sub G/) fading channels is analyzed and evaluated and novel closed form expressions for the SNR statistics, the average Shannon's channel capacity and the bit error rate are derived.
Posted Content
Preamble-based Channel Estimation in OFDM/OQAM Systems: A Review
TL;DR: In this article, a review of the existing preamble structures and associated channel estimation methods is given, for both single- (SISO) and multiple-antenna (MIMO) systems.
Journal ArticleDOI
Review: Preamble-based channel estimation in OFDM/OQAM systems: A review
TL;DR: A review of the existing preamble structures and associated channel estimation methods is given, for both single- (SISO) and multiple-antenna (MIMO) systems.
Journal ArticleDOI
A Novel Hierarchical Bayesian Approach for Sparse Semisupervised Hyperspectral Unmixing
TL;DR: Experimental results on both synthetic and real hyperspectral data illustrate that the proposed method converges fast, favors sparsity in the abun dances' vector, and offers improved estimation accuracy compared to other related methods.
Journal ArticleDOI
Preamble-Based Channel Estimation for CP-OFDM and OFDM/OQAM Systems: A Comparative Study
TL;DR: Preamble-based least squares (LS) channel estimation in orthogonal frequency division multiplexing (OFDM) systems of the QAM and offset QAM (OQAM) types is considered and a sparse preamble consisting of equipowered and equispaced pilots embedded in zeros is investigated.