Books

Advanced Optical Wireless Communication Systems

Optical wireless communications is a dynamic area of research and development. Combining fundamental theory with a broad overview, this book is an ideal reference for anyone working in the field, as well as a valuable guide for self-study. It begins by describing important issues in optical wireless theory, including coding and modulation techniques for optical wireless, wireless optical CDMA communication systems, equalization and Markov chains in cloud channels and optical MIMO systems, as well as explaining key issues in information theory for optical wireless channels. The next section describes unique channels that could be found in optical wireless applications, such as NLOS UV atmospheric scattering channels, underwater communication links and a combination of hybrid RF/optical wireless systems. The final section describes applications of optical wireless technology, such as quantum encryption, visible light communication, IR links and sensor networks, with step-by-step guidelines to help reduce design time and cost.

Telecommunication Systems Second Edition (in Greek)

Το βιβλίο επιδιώκει να καλύψει τις βασικές αρχές που διέπουν την λειτουργία των τηλεπικοινωνιακών συστημάτων. Η ύλη του βιβλίου παρουσιάζεται σε συμπαγή μορφή δίνοντας ιδιαίτερο βάρος στην εμπέδωση των εννοιών και των τεχνικών, μέσω ενός μεγάλου αριθμού παραδειγμάτων, προσομοιώσεων και σχημάτων.

Απευθύνεται σε φοιτητές των τμημάτων Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, Μηχανικών Τηλεπικοινωνιών και Δικτύων, Πληροφορικής, καθώς και σε σπουδαστές των Τεχνολογικών Ιδρυμάτων των αντίστοιχων τμημάτων στα οποία διδάσκεται το μάθημα των τηλεπικοινωνιών.

S. A. Kotsopoulos and G. K. Karagiannidis, Mobile Communications, Book-Greek Edition, ISBN: 960-7510-43-7, Papasotiriou S.A Publication, 1997

Chapters in Books

1. S. Bouzouki, S. A. Kotsopoulos and G. K. Karagiannidis, “Optimization of cell-planning RF design parameters in complex geographic areas, Chapter in the Book: “3rd Generation Mobile Communications Systems”, SPRINGER Publications, April 2001.

2. G. K. Karagiannidis and S. A. Kotsopoulos, “Outage Performance Considerations in Mobile Cellular Networks,” Chapter in the Book: “Quality, Survivability and Reliability of Large Scale Systems: Case Studies—Olympic Games”, WILEY Publications, January 2003.

3. G. K. Karagiannidis, M. Bousquet, C. Caini, M. A. Vázquez Castro, S. Cioni, I. Frigyes, P. Horvath, T. Javornik, G. Kandus, M. Luglio, P. Salmi and D. A. Zogas, “Diversity Techniques and Fade Mitigation,” Chapter in the Book : “Digital Satellite Communications”, Kluwer Academic Publishers, to appear.

Journals

2012

[104] C. Zhong, M. Matthaiou, G. Karagiannidis, A. Huang, Z. Zhang, “Capacity Bounds for AF Dual-hop Relaying in $cal G$ Fading Channels”, In Vehicular Technology, IEEE Transactions on, vol. PP, no. 99, pp. 1, 2012. [bib] [pdf] [doi]

[103] Yunfei Chen, G.K. Karagiannidis, Hao Lu, Ning Cao, “Novel Approximations to the Statistics of Products of Independent Random Variables and Their Applications in Wireless Communications”, In Vehicular Technology, IEEE Transactions on, vol. 61, no. 2, pp. 443 -454, 2012. [bib] [pdf] [doi]

[102] J.-C.S. Filho, M.D. Yacoub, G.K. Karagiannidis, “Mean level signal crossing rate for an arbitrary stochastic process: comment”, In Journal of Optical Society of America, vol. 29, no. 2, pp. 1 -3, 2012. (pdf2) [bib] [pdf]

2011

[101] T. Hazim, G.K. Karagiannidis, T.A. Tsiftsis, “Probability of early detection of ultra-wideband positioning sensor networks”, In Wireless Sensor Systems, IET, vol. 1, no. 3, pp. 123 -128, 2011. [bib] [pdf] [doi]

[100] M. Matthaiou, N.D. Chatzidiamantis, G.K. Karagiannidis, J.A. Nossek, “ZF Detectors over Correlated K Fading MIMO Channels”, In Communications, IEEE Transactions on, vol. 59, no. 6, pp. 1591 -1603, 2011. [bib] [pdf] [doi]

[99] N.D. Chatzidiamantis, A.S. Lioumpas, G.K. Karagiannidis, S. Arnon, “Adaptive Subcarrier PSK Intensity Modulation in Free Space Optical Systems”, In Communications, IEEE Transactions on, vol. 59, no. 5, pp. 1368 -1377, 2011. [bib] [pdf] [doi]

[98] N.D. Chatzidiamantis, G.K. Karagiannidis, “On the Distribution of the Sum of Gamma-Gamma Variates and Applications in RF and Optical Wireless Communications”, In Communications, IEEE Transactions on, vol. 59, no. 5, pp. 1298 -1308, 2011. [bib] [pdf] [doi]

[97] S.D. Assimonis, M. Matthaiou, G.K. Karagiannidis, J.A. Nossek, “Improved parametric families of intersymbol interference-free Nyquist pulses using inner and outer functions”, In Signal Processing, IET, vol. 5, no. 2, pp. 157 -163, 2011. [bib] [pdf] [doi]

[96] M. Matthaiou, N.D. Chatzidiamantis, G.K. Karagiannidis, “A New Lower Bound on the Ergodic Capacity of Distributed MIMO Systems”, In Signal Processing Letters, IEEE, vol. 18, no. 4, pp. 227 -230, 2011. [bib] [pdf] [doi]

[95] H.A. Suraweera, T.A. Tsiftsis, G.K. Karagiannidis, A. Nallanathan, “Effect of Feedback Delay on Amplify-and-Forward Relay Networks With Beamforming”, In Vehicular Technology, IEEE Transactions on, vol. 60, no. 3, pp. 1265 -1271, 2011. [bib] [pdf] [doi]

[94] N.D. Chatzidiamantis, H.G. Sandalidis, G.K. Karagiannidis, M. Matthaiou, “Inverse Gaussian Modeling of Turbulence-Induced Fading in Free-Space Optical Systems”, In Lightwave Technology, Journal of, vol. 29, no. 10, pp. 1590 -1596, 2011. [bib] [pdf] [doi]

[93] Caijun Zhong, M. Matthaiou, G.K. Karagiannidis, T. Ratnarajah, “Generic Ergodic Capacity Bounds for Fixed-Gain AF Dual-Hop Relaying Systems”, In Vehicular Technology, IEEE Transactions on, vol. 60, no. 8, pp. 3814 -3824, 2011. [bib] [pdf] [doi]

[92] N. Zlatanov, Z. Hadzi-Velkov, G.K. Karagiannidis, R. Schober, “Cooperative Diversity With Mobile Nodes: Capacity Outage Rate and Duration”, In Information Theory, IEEE Transactions on, vol. 57, no. 10, pp. 6555 -6568, 2011. [bib] [pdf] [doi]

2010

[91] N.D. Chatzidiamantis, G.K. Karagiannidis, M. Uysal, “Generalized Maximum-Likelihood Sequence Detection for Photon-Counting Free Space Optical Systems”, In Communications, IEEE Transactions on, vol. 58, no. 12, pp. 3381 -3385, 2010. [bib] [pdf] [doi]

[90] M. Matthaiou, P. de Kerret, G.K. Karagiannidis, J.A. Nossek, “Mutual Information Statistics and Beamforming Performance Analysis of Optimized LoS MIMO Systems”, In Communications, IEEE Transactions on, vol. 58, no. 11, pp. 3316 -3329, 2010. [bib] [pdf] [doi]

[89] D.S. Michalopoulos, G.K. Karagiannidis, “Bypassing Orthogonal Relaying Transmissions via Spatial Signal Separation”, In Communications, IEEE Transactions on, vol. 58, no. 10, pp. 3028 -3038, 2010. [bib] [pdf] [doi]

[88] D.S. Michalopoulos, A.S. Lioumpas, G.K. Karagiannidis, R. Schober, “Selective Cooperative Relaying over Time-Varying Channels”, In Communications, IEEE Transactions on, vol. 58, no. 8, pp. 2402 -2412, 2010. [bib] [pdf] [doi]

[87] A.S. Lioumpas, G.K. Karagiannidis, “Variable-rate M-PSK communications without channel amplitude estimation”, In Communications, IEEE Transactions on, vol. 58, no. 5, pp. 1477 -1484, 2010. [bib] [pdf] [doi]

[86] K.N. Pappi, A.S. Lioumpas, G.K. Karagiannidis, “x003B8;-QAM: A parametric quadrature amplitude modulation family and its performance in AWGN and fading channels”, In Communications, IEEE Transactions on, vol. 58, no. 4, pp. 1014 -1019, 2010. [bib] [pdf] [doi]

[85] Aimilia P. Doukeli, Athanasios S. Lioumpas, George K. Karagiannidis, Panayiotis V. Frangos, “Increasing the Efficiency of Rake Receivers for Ultra-Wideband Applications”, In Wirel. Pers. Commun., Kluwer Academic Publishers, vol. 62, no. 3, Hingham, MA, USA, pp. 715-728, 2010. [bib] [pdf] [doi]

[84] N. Zlatanov, Z. Hadzi-Velkov, G. Karagiannidis, “An efficient approximation to the correlated Nakagami-m sums and its application in equal gain diversity receivers”, In Wireless Communications, IEEE Transactions on, vol. 9, no. 1, pp. 302 -310, 2010. [bib] [pdf] [doi]

[83] M. Matthaiou, N.D. Chatzidiamantis, G.K. Karagiannidis, J.A. Nossek, “On the Capacity of Generalized-Fading MIMO Channels”, In Signal Processing, IEEE Transactions on, vol. 58, no. 11, pp. 5939 -5944, 2010. [bib] [pdf] [doi]

[82] N.D. Chatzidiamantis, M. Uysal, T.A. Tsiftsis, G.K. Karagiannidis, “Iterative Near Maximum-Likelihood Sequence Detection for MIMO Optical Wireless Systems”, In Lightwave Technology, Journal of, vol. 28, no. 7, pp. 1064 -1070, 2010. [bib] [pdf] [doi]

[81] Enis Kocan, Milica Pejanovic-Djurisic, Diomidis S. Michalopoulos, George K. Karagiannidis, “Performance Evaluation of OFDM Amplify-and-Forward Relay System with Subcarrier Permutation”, In IEICE Transactions on Communications, vol. E93.B, no. 5, pp. 1216-1223, 2010. [bib] [pdf]

2009

[80] H. Suraweera, G. Karagiannidis, P. Smith, “Performance analysis of the dual-hop asymmetric fading channel”, In Wireless Communications, IEEE Transactions on, vol. 8, no. 6, pp. 2783 -2788, 2009. [bib] [pdf] [doi]

[79] Z. Hadzi-Velkov, N. Zlatanov, G. Karagiannidis, “On the second order statistics of the multihop rayleigh fading channel”, In Communications, IEEE Transactions on, vol. 57, no. 6, pp. 1815 -1823, 2009. [bib] [pdf] [doi]

[78] H.A. Suraweera, D.S. Michalopoulos, G.K. Karagiannidis, “Performance of Distributed Diversity Systems With a Single Amplify-and-Forward Relay”, In Vehicular Technology, IEEE Transactions on, vol. 58, no. 5, pp. 2603 -2608, 2009. [bib] [pdf] [doi]

[77] H.A. Suraweera, R.H.Y. Louie, Yonghui Li, G.K. Karagiannidis, B. Vucetic, “Two hop amplify-and-forward transmission in mixed rayleigh and rician fading channels”, In Communications Letters, IEEE, vol. 13, no. 4, pp. 227 -229, 2009. [bib] [pdf] [doi]

[76] V.M. Kapinas, S.K. Mihos, G.K. Karagiannidis, “On the Monotonicity of the Generalized Marcum and Nuttall Q-Functions”, In Information Theory, IEEE Transactions on, vol. 55, no. 8, pp. 3701 -3710, 2009. [bib] [pdf] [doi]

[75] T.A. Tsiftsis, H.G. Sandalidis, G.K. Karagiannidis, M. Uysal, “Optical wireless links with spatial diversity over strong atmospheric turbulence channels”, In Wireless Communications, IEEE Transactions on, vol. 8, no. 2, pp. 951 -957, 2009. [bib] [pdf] [doi]

[74] H.G. Sandalidis, T.A. Tsiftsis, G.K. Karagiannidis, “Optical Wireless Communications With Heterodyne Detection Over Turbulence Channels With Pointing Errors”, In Lightwave Technology, Journal of, vol. 27, no. 20, pp. 4440 -4445, 2009. [bib] [pdf] [doi]

[73] H.A. Suraweera, D.S. Michalopoulos, G.K. Karagiannidis, “Semi-blind amplify-and-forward with partial relay selection”, In Electronics Letters, vol. 45, no. 6, pp. 317 -319, 2009. [bib] [pdf] [doi]

2008

[72] D.S. Michalopoulos, A.S. Lioumpas, G.K. Karagiannidis, “Increasing power efficiency in transmitter diversity systems under error performance constraints”, In Communications, IEEE Transactions on, vol. 56, no. 12, pp. 2025 -2029, 2008. [bib] [pdf] [doi]

[71] P. Katsis, G. Karagiannidis, F.-n. Pavlidou, “Multi-user selection diversity for spread-spectrum multi-carrier multiple-access systems”, In Communications, IEEE Transactions on, vol. 56, no. 12, pp. 2166 -2177, 2008. [bib] [pdf] [doi]

[70] A. Lioumpas, G. Karagiannidis, T. Tsiftsis, “Adaptive generalized selection combining (A-GSC) receivers”, In Wireless Communications, IEEE Transactions on, vol. 7, no. 12, pp. 5214 -5219, 2008. [bib] [pdf] [doi]

[69] N. Zlatanov, Z. Hadzi-Velkov, G. Karagiannidis, “Level crossing rate and average fade duration of the double Nakagami-m random process and application in MIMO keyhole fading channels”, In Communications Letters, IEEE, vol. 12, no. 11, pp. 822 -824, 2008. [bib] [pdf] [doi]

[68] D. Michalopoulos, G. Karagiannidis, “Two-relay distributed switch and stay combining”, In Communications, IEEE Transactions on, vol. 56, no. 11, pp. 1790 -1794, 2008. [bib] [pdf] [doi]

[67] S.D. Assimonis, M. Matthaiou, G.K. Karagiannidis, “Two-parameter nyquist pulses with better performance”, In Communications Letters, IEEE, vol. 12, no. 11, pp. 807 -809, 2008. [bib] [pdf] [doi]

[66] D. Michalopoulos, G. Karagiannidis, “Performance analysis of single relay selection in rayleigh fading”, In Wireless Communications, IEEE Transactions on, vol. 7, no. 10, pp. 3718 -3724, 2008. [bib] [pdf] [doi]

[65] D.S. Michalopoulos, G.K. Karagiannidis, T.A. Tsiftsis, R.K. Mallik, “Distributed Transmit Antenna Selection (DTAS) Under Performance or Energy Consumption Constraints”, In Wireless Communications, IEEE Transactions on, vol. 7, no. 4, pp. 1168 -1173, 2008. [bib] [pdf] [doi]

[64] H.A. Suraweera, G.K. Karagiannidis, “Closed-form error analysis of the non-identical Nakagami-m relay fading channel”, In Communications Letters, IEEE, vol. 12, no. 4, pp. 259 -261, 2008. [bib] [pdf] [doi]

[63] D.S. Michalopoulos, G.K. Karagiannidis, “PHY-layer Fairness in Amplify and Forward Cooperative Diversity Systems”, In Wireless Communications, IEEE Transactions on, vol. 7, no. 3, pp. 1073 -1082, 2008. [bib] [pdf] [doi]

[62] H.G. Sandalidis, T.A. Tsiftsis, G.K. Karagiannidis, M. Uysal, “BER Performance of FSO Links over Strong Atmospheric Turbulence Channels with Pointing Errors”, In Communications Letters, IEEE, vol. 12, no. 1, pp. 44 -46, 2008. [bib] [pdf] [doi]

[61] Georgios S. Paschos, Ioannis G. Tsoulos, Efstathios D. Vagenas, Stavros A. Kotsopoulos, George K. Karagiannidis, “A deterministic simulation model for sojourn time in urban cells with square street geometry”, In Int. J. Veh. Technol., Hindawi Publishing Corp., vol. 2008, no. 1, New York, NY, United States, pp. 1:1-1:6, 2008. [bib] [pdf] [doi]

2007

[60] A.S. Lioumpas, G.K. Karagiannidis, A.C. Iossifides, “Channel Quality Estimation Index (CQEI): A Long-Term Performance Metric for Fading Channels and an Application in EGC Receivers”, In Wireless Communications, IEEE Transactions on, vol. 6, no. 9, pp. 3315 -3323, 2007. [bib] [pdf] [doi]

[59] G.K. Karagiannidis, A.S. Lioumpas, “An Improved Approximation for the Gaussian Q-Function”, In Communications Letters, IEEE, vol. 11, no. 8, pp. 644 -646, 2007. [bib] [pdf] [doi]

[58] D.S. Michalopoulos, G.K. Karagiannidis, “Distributed Switch and Stay Combining (DSSC) with a Single Decode and Forward Relay”, In Communications Letters, IEEE, vol. 11, no. 5, pp. 408 -410, 2007. [bib] [pdf] [doi]

[57] A.S. Lioumpas, A.P. Doukeli, G.K. Karagiannidis, “Another Look at Multibranch Switched Diversity Systems”, In Communications Letters, IEEE, vol. 11, no. 4, pp. 325 -327, 2007. [bib] [pdf] [doi]

[56] R.K. Mallik, G.K. Karagiannidis, “Equal-Gain Combining with Unequal Energy Constellations”, In Wireless Communications, IEEE Transactions on, vol. 6, no. 3, pp. 1125 -1132, 2007. [bib] [pdf] [doi]

[55] G.D. Papadopoulos, G.K. Karagiannidis, F.N. Pavlidou, “Performance bounds of space-time block coding in rician and log-normal fading channels”, In Communications, IET, vol. 1, no. 1, pp. 86 -91, 2007. [bib] [pdf] [doi]

[54] Péter Horváth, George K. Karagiannidis, Peter R. King, Stavros Stavrou, István Frigyes, “Investigations in satellite MIMO channel modeling: accent on polarization”, In EURASIP J. Wirel. Commun. Netw., Hindawi Publishing Corp., vol. 2007, no. 1, New York, NY, United States, pp. 55-55, 2007. [bib] [pdf]

[53] A.S. Lioumpas, G.K. Karagiannidis, “Blind Ratio Combining (BRC): An Optimum Diversity Receiver for Coherent Detection With Unknown Fading Amplitudes”, In Communications, IEEE Transactions on, vol. 55, no. 9, pp. 1725 -1735, 2007. [bib] [pdf] [doi]

[52] G.K. Karagiannidis, N.C. Sagias, P.T. Mathiopoulos, “N Nakagami: A Novel Stochastic Model for Cascaded Fading Channels”, In Communications, IEEE Transactions on, vol. 55, no. 8, pp. 1453 -1458, 2007. [bib] [pdf] [doi]

[51] M.A. Gatzianas, L.G. Georgiadis, G.K. Karagiannidis, “Gain Adaptation Policies for Dual-Hop Nonregenerative Relayed Systems”, In Communications, IEEE Transactions on, vol. 55, no. 8, pp. 1472 -1477, 2007. [bib] [pdf] [doi]

2006

[50] George K. Karagiannidis, “A closed-form solution for the distribution of the sum of Nakagami-m random phase vectors”, In Communications Letters, IEEE, vol. 10, no. 12, pp. 828 -830, 2006. [bib] [pdf] [doi]

[49] G.K. Karagiannidis, “On the symbol error probability of general order rectangular qam in nakagami-m fading”, In Communications Letters, IEEE, vol. 10, no. 11, pp. 745 -747, 2006. [bib] [pdf] [doi]

[48] Hong Nie, P. Takis Mathiopoulos, G.K. Karagiannidis, “Reverse link capacity analysis of cellular CDMA systems with controlled power disparities and successive interference cancellation”, In Wireless Communications, IEEE Transactions on, vol. 5, no. 9, pp. 2447 -2457, 2006. [bib] [pdf] [doi]

[47] P.S. Bithas, N.C. Sagias, P.T. Mathiopoulos, G.K. Karagiannidis, A.A. Rontogiannis, “On the performance analysis of digital communications over generalized-K fading channels”, In Communications Letters, IEEE, vol. 10, no. 5, pp. 353 – 355, 2006. [bib] [pdf] [doi]

[46] N.V. Kokkalis, P.T. Mathiopoulos, G.K. Karagiannidis, C.S. Koukourlis, “Performance analysis of M-ary PPM TH-UWB systems in the presence of MUI and timing jitter”, In Selected Areas in Communications, IEEE Journal on, vol. 24, no. 4, pp. 822 – 828, 2006. [bib] [pdf] [doi]

[45] Theodoros A. Tsiftsis, George K. Karagiannidis, P. Takis Mathiopoulos, Stavros A. Kotsopoulos, “Nonregenerative dual-hop cooperative links with selection diversity”, In URASIP Journal on Wireless Communications and Networking, Hindawi Publishing Corp., vol. 2006, no. 2, New York, NY, United States, pp. 34-34, 2006. [bib] [pdf] [doi]

[44] G.K. Karagiannidis, “Performance bounds of multihop wireless communications with blind relays over generalized fading channels”, In Wireless Communications, IEEE Transactions on, vol. 5, no. 3, pp. 498 – 503, 2006. [bib] [pdf] [doi]

[43] G.K. Karagiannidis, T.A. Tsiftsis, R.K. Mallik, “Bounds for multihop relayed communications in nakagami-m fading”, In Communications, IEEE Transactions on, vol. 54, no. 1, pp. 18 – 22, 2006. [bib] [pdf] [doi]

[42] N.C. Sagias, G.K. Karagiannidis, P.T. Mathiopoulos, T.A. Tsiftsis, “On the performance analysis of equal-gain diversity receivers over generalized gamma fading channels”, In Wireless Communications, IEEE Transactions on, vol. 5, no. 10, pp. 2967 -2975, 2006. [bib] [pdf] [doi]

[41] G.K. Karagiannidis, N.C. Sagias, T.A. Tsiftsis, “Closed-form statistics for the sum of squared Nakagami-m variates and its applications”, In Communications, IEEE Transactions on, vol. 54, no. 8, pp. 1353 -1359, 2006. [bib] [pdf] [doi]

[40] G.K. Karagiannidis, D.A. Zogas, “Authors’ reply [to comments on ‘Infinite-series representations associated with the bivariate Rician distribution and their applications’]”, In Communications, IEEE Transactions on, vol. 54, no. 8, pp. 1512 -1513, 2006. [bib] [pdf] [doi]

[39] G.K. Karagiannidis, T.A. Tsiftsis, H.G. Sandalidis, “Outage probability of relayed free space optical communication systems”, In Electronics Letters, vol. 42, no. 17, pp. 994 – 995, 2006. [bib] [pdf] [doi]

2005

[38] G.K. Karagiannidis, T.A. Tsiftsis, N.C. Sagias, “A closed-form upper-bound for the distribution of the weighted sum of Rayleigh variates”, In Communications Letters, IEEE, vol. 9, no. 7, pp. 589 – 591, 2005. [bib] [pdf] [doi]

[37] N.C. Sagias, G.K. Karagiannidis, D.A. Zogas, G.S. Tombras, S.A. Kotsopoulos, “Average output SINR of equal-gain diversity in correlated Nakagami-m fading with cochannel interference”, In Wireless Communications, IEEE Transactions on, vol. 4, no. 4, pp. 1407 – 1411, 2005. [bib] [pdf] [doi]

[36] N.C. Sagias, G.K. Karagiannidis, “Effects of carrier phase error on EGC receivers in correlated Nakagami-m fading”, In Communications Letters, IEEE, vol. 9, no. 7, pp. 580 – 582, 2005. [bib] [pdf] [doi]

[35] G.K. Karagiannidis, D.A. Zogas, N.C. Sagias, S.A. Kotsopoulos, G.S. Tombras, “Equal-gain and maximal-ratio combining over nonidentical Weibull fading channels”, In Wireless Communications, IEEE Transactions on, vol. 4, no. 3, pp. 841 – 846, 2005. [bib] [pdf] [doi]

[34] D.A. Zogas, G.K. Karagiannidis, S.A. Kotsopoulos, “Equal gain combining over Nakagami-n (rice) and Nakagami-q (Hoyt) generalized fading channels”, In Wireless Communications, IEEE Transactions on, vol. 4, no. 2, pp. 374 – 379, 2005. [bib] [pdf] [doi]

[33] N.C. Sagias, D.A. Zogas, G.K. Karagiannidis, “Selection diversity receivers over nonidentical Weibull fading channels”, In Vehicular Technology, IEEE Transactions on, vol. 54, no. 6, pp. 2146 – 2151, 2005. [bib] [pdf] [doi]

[32] D.A. Zogas, G.K. Karagiannidis, “Infinite-series representations associated with the bivariate rician distribution and their applications”, In Communications, IEEE Transactions on, vol. 53, no. 11, pp. 1790 – 1794, 2005. [bib] [pdf] [doi]

[31] G.K. Karagiannidis, N.C. Sagias, D.A. Zogas, “Error analysis of M-QAM with equal-gain diversity over generalised fading channels”, In Communications, IEE Proceedings-, vol. 152, no. 1, pp. 69 – 74, 2005. [bib] [pdf] [doi]

[30] N.C. Sagias, G.K. Karagiannidis, “Gaussian class multivariate Weibull distributions: theory and applications in fading channels”, In Information Theory, IEEE Transactions on, vol. 51, no. 10, pp. 3608 – 3619, 2005. [bib] [pdf] [doi]

[29] P.S. Bithas, G.K. Karagiannidis, N.C. Sagias, P.T. Mathiopoulos, S.A. Kotsopoulos, G.E. Corazza, “Performance analysis of a class of GSC receivers over nonidentical Weibull fading channels”, In Vehicular Technology, IEEE Transactions on, vol. 54, no. 6, pp. 1963 – 1970, 2005. [bib] [pdf] [doi]

[28] T.A. Tsiftsis, G.K. Karagiannidis, S.A. Kotsopoulos, “Dual-hop wireless communications with combined gain relays”, In Communications, IEE Proceedings-, vol. 152, no. 5, pp. 528 – 532, 2005. [bib] [pdf] [doi]

[27] N.C. Sagias, P. Varzakas, G.S. Tombras, G.K. Karagiannidis, “Spectral efficiency for selection combining RAKE receivers over Weibull fading channels”, In Journal of the Franklin Institute, vol. 342, no. 1, pp. 7 – 13, 2005. [bib] [pdf] [doi]

[26] Dimitris A. Zogas, Nikos C. Sagias, George S. Tombras, George K. Karagiannidis, “Average output SNR of equal-gain diversity receivers over correlative Weibull fading channels”, In European Transactions on Telecommunications, John Wiley & Sons, Ltd., vol. 16, no. 6, pp. 521-525, 2005. [bib] [pdf] [doi]

2004

[25] N.C. Sagias, G.K. Karagiannidis, D.A. Zogas, P.T. Mathiopoulos, G.S. Tombras, “Performance analysis of dual selection diversity in correlated Weibull fading channels”, In Communications, IEEE Transactions on, vol. 52, no. 7, pp. 1063 – 1067, 2004. [bib] [pdf] [doi]

[24] N.C. Sagias, D.A. Zogas, G.K. Karagiannidis, G.S. Tombras, “Channel capacity and second-order statistics in Weibull fading”, In Communications Letters, IEEE, vol. 8, no. 6, pp. 377 – 379, 2004. [bib] [pdf] [doi]

[23] G.K. Karagiannidis, “Moments-based approach to the performance analysis of equal gain diversity in Nakagami-m fading”, In Communications, IEEE Transactions on, vol. 52, no. 5, pp. 685 – 690, 2004. [bib] [pdf] [doi]

[22] N.C. Sagias, G.K. Karagiannidis, G.S. Tombras, “Error-rate analysis of switched diversity receivers in Weibull fading”, In Electronics Letters, vol. 40, no. 11, pp. 681 – 682, 2004. [bib] [pdf] [doi]

[21] T.A. Tsiftsis, G.K. Karagiannidis, S.A. Kotsopoulos, F.-N. Pavlidou, “BER analysis of collaborative dual-hop wireless transmissions”, In Electronics Letters, vol. 40, no. 11, pp. 679 – 681, 2004. [bib] [pdf] [doi]

[20] P.T. Mathiopoulos, G.K. Karagiannidis, J.S. Toor, “Effects of ACI and nonlinearities on the performance of differentially detected GMSK signals”, In Communications, IEE Proceedings-, vol. 151, no. 2, pp. 163 – 169, 2004. [bib] [pdf] [doi]

[19] S. Louvros, A.C. Iossifides, G. Economou, G.K. Karagiannidis, S.A. Kotsopoulos, D. Zevgolis, “Time domain modeling and characterization of polymer optical fibers”, In Photonics Technology Letters, IEEE, vol. 16, no. 2, pp. 455 -457, 2004. [bib] [pdf] [doi]

[18] G.K. Karagiannidis, D.A. Zogas, S.A. Kotsopoulos, “Statistical properties of the EGC output SNR over correlated Nakagami-m fading channels”, In Wireless Communications, IEEE Transactions on, vol. 3, no. 5, pp. 1764 – 1769, 2004. [bib] [pdf] [doi]

[17] G.K. Karagiannidis, D.A. Zogas, S.A. Kotsopoulos, “BER performance of dual predetection EGC in correlative Nakagami-m fading”, In Communications, IEEE Transactions on, vol. 52, no. 1, pp. 50 – 53, 2004. [bib] [pdf] [doi]

[16] D.A. Zogas, G.K. Karagiannidis, S.A. Kotsopoulos, “On the average output SNR in selection combining with three correlated branches over Nakagami-m fading channels”, In Wireless Communications, IEEE Transactions on, vol. 3, no. 1, pp. 25 – 28, 2004. [bib] [pdf] [doi]

[15] Nikos C. Sagias, Panagiotis Varzakas, George S. Tombras, George K. Karagiannidis, “Average channel capacity for generalized-selection combining RAKE receivers”, In European Transactions on Telecommunications, John Wiley & Sons, Ltd., vol. 15, no. 5, pp. 497-500, 2004. [bib] [pdf] [doi]

2003

[14] N.C. Sagias, D.A. Zogas, G.K. Karagiannidis, G.S. Tombras, “Performance analysis of switched diversity receivers in Weibull fading”, In Electronics Letters, vol. 39, no. 20, pp. 1472 – 1474, 2003. [bib] [pdf] [doi]

[13] G.K. Karagiannidis, “Performance analysis of SIR-based dual selection diversity over correlated Nakagami-m fading channels”, In Vehicular Technology, IEEE Transactions on, vol. 52, no. 5, pp. 1207 – 1216, 2003. [bib] [pdf] [doi]

[12] G.K. Karagiannidis, D.A. Zogas, S.A. Kotsopoulos, “Performance analysis of triple selection diversity over exponentially correlated Nakagami-m fading channels”, In Communications, IEEE Transactions on, vol. 51, no. 8, pp. 1245 – 1248, 2003. [bib] [pdf] [doi]

[11] G.K. Karagiannidis, D.A. Zogas, S.A. Kotsopoulos, “On the multivariate Nakagami-m distribution with exponential correlation”, In Communications, IEEE Transactions on, vol. 51, no. 8, pp. 1240 – 1244, 2003. [bib] [pdf] [doi]

[10] G.K. Karagiannidis, D.A. Zogas, S.A. Kotsopoulos, “An efficient approach to multivariate Nakagami-m distribution using Green’s matrix approximation”, In Wireless Communications, IEEE Transactions on, vol. 2, no. 5, pp. 883 – 889, 2003. [bib] [pdf] [doi]

2002

[9] G.K. Karagiannidis, S.A. Kotsopoulos, P.T. Mathiopoulos, “Generalised approach for evaluation of outage performance in micro- and pico-cellular networks”, In Communications, IEE Proceedings-, vol. 149, no. 2, pp. 123 – 128, 2002. [bib] [pdf] [doi]

[8] K. Ioannou, S. Louvros, I. Panoutsopoulos, S. Kotsopoulos, G.K. Karagiannidis, “Optimizing the handover call blocking probability in cellular networks with high speed moving terminals”, In Communications Letters, IEEE, vol. 6, no. 10, pp. 422 -424, 2002. [bib] [pdf] [doi]

2001

[7] G.K. Karagiannidis, S.A. Kotsopoulos, “Corrections and Clarifications to ”On the Distribution of the Weighted Sum of L Independent Rician and Nakagami Envelopes in the Presence of AWGN””, In KICS Journal of Communications and Networks, vol. 3, no. 4, pp. 396, 2001. [bib] [pdf]

[6] George K. Karagiannidis, Stavros A. Kotsopoulos, “On the distribution of the weighted sum of L independent Rician and Nakagami envelopes in the presence of AWGN”, In KICS Journal of Communications and Networks, vol. 3, no. 2, pp. 26-30, 2001. [bib] [pdf]

[5] George Karagiannidis, Chris Georgopoulos, Stavros Kotsopoulos, “Outage probability analysis for a nakagami signal in L nakagami interferers”, In European Transactions on Telecommunications, Wiley Subscription Services, Inc., A Wiley Company, vol. 12, no. 2, pp. 145-150, 2001. [bib] [pdf] [doi]

[4] Stavroula Bouzouki, Stavros Kotsopoulos, George Karagiannidis, Kostas Chassomeris, Dimitris Lymberopoulos, “On optimal cell planning: Case study for a DCS 1800 system”, In International Journal of Communication Systems, John Wiley & Sons, Ltd., vol. 14, no. 9, pp. 857-870, 2001. [bib] [pdf] [doi]

[3] G. Karagiannidis, S. Bouzouki, E. Karavatselou, S. Kotsopoulos, D. Lymberopoulos, “On the development of fully adaptive channel allocation strategies for usage in high-capacity cellular mobile radio systems”, In International Journal of Communication Systems, John Wiley & Sons, Ltd., vol. 14, no. 4, pp. 431-446, 2001. [bib] [pdf] [doi]

2000

[2] G.K. Karagiannidis, S.A. Kotsopoulos, “Exact evaluation of equal-gain diversity in the presence of Nakagami fading”, In Electronics Letters, vol. 36, no. 14, pp. 1229 -1231, 2000. [bib] [pdf] [doi]

[1] S.A. Kotsopoulos, G.K. Karagiannidis, “Error performance for equal-gain combiners over Rayleigh fading channels”, In Electronics Letters, vol. 36, no. 10, pp. 892 -894, 2000. [bib] [pdf] [doi]

Conference

2011

[87] D.S. Michalopoulos, N.D. Chatzidiamantis, R. Schober, G.K. Karagiannidis, “Relay Selection with Outdated Channel Estimates in Nakagami-m Fading”, In Communications (ICC), 2011 IEEE International Conference on, vol. , no. , pp. 1 -6, 2011. [bib] [pdf] [doi]

[86] N. Zlatanov, Z. Hadzi-Velkov, G.K. Karagiannidis, R. Schober, “Outage Rate and Outage Duration of Decode-and-Forward Cooperative Diversity Systems”, In Communications (ICC), 2011 IEEE International Conference on, vol. , no. , pp. 1 -6, 2011. [bib] [pdf] [doi]

[85] N.D. Chatzidiamantis, G.K. Karagiannidis, E.E. Kriezis, M. Matthaiou, “Diversity Combining in Hybrid RF/FSO Systems with PSK Modulation”, In Communications (ICC), 2011 IEEE International Conference on, vol. , no. , pp. 1 -6, 2011. [bib] [pdf] [doi]

[84] H.A. Suraweera, D.S. Michalopoulos, R. Schober, G.K. Karagiannidis, A. Nallanathan, “Fixed Gain Amplify-and-Forward Relaying with Co-Channel Interference”, In Communications (ICC), 2011 IEEE International Conference on, vol. , no. , pp. 1 -6, 2011. [bib] [pdf] [doi]

[83] N. Zlatanov, R. Schober, Z. Hadzi-Velkov, G. Karagiannidis, “Average outage and non-outage duration of selective decode-and-forward relaying”, In Information Theory (CWIT), 2011 12th Canadian Workshop on, vol. , no. , pp. 94 -97, 2011. [bib] [pdf] [doi]

[82] M. Matthaiou, N.D. Chatzidiamantis, G.K. Karagiannidis, “On the sum rate of ZF detectors over correlated K fading MIMO channels”, In Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on, vol. , no. , pp. 3244 -3247, 2011. [bib] [pdf] [doi]

[81] N.D. Chatzidiamantis, H.G. Sandalidis, G.K. Karagiannidis, S.A. Kotsopoulos, “On the inverse-Gaussian shadowing”, In Communications and Information Technology (ICCIT), 2011 International Conference on, vol. , no. , pp. 142 -146, 2011. [bib] [pdf] [doi]

[80] M. Matthaiou, N.D. Chatzidiamantis, H.A. Suraweera, G.K. Karagiannidis, “Performance analysis of space-time block codes over generalized-K fading MIMO channels”, In Communication Technologies Workshop (Swe-CTW), 2011 IEEE Swedish, vol. , no. , pp. 68 -73, 2011. [bib] [pdf] [doi]

[79] D.S. Karas, G.K. Karagiannidis, R. Schober, “Neural network based PHY-layer key exchange for wireless communications”, In Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on, vol. , no. , pp. 1233 -1238, 2011. [bib] [pdf] [doi]

[78] D.S. Michalopoulos, N.D. Chatzidiamantis, R. Schober, G.K. Karagiannidis, “Diversity Loss Due to Suboptimal Relay Selection”, In Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE, vol. , no. , pp. 1 -6, 2011. [bib] [pdf] [doi]

[77] N.D. Chatzidiamantis, D.S. Michalopoulos, E.E. Kriezis, G.K. Karagiannidis, R. Schober, “Relay Selection in Relay-Assisted Free Space Optical Systems”, In Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE, vol. , no. , pp. 1 -6, 2011. [bib] [pdf] [doi]

2010

[76] Theodoros A. Tsiftsis, Zoran Hadzi-Velkov, George K. Karagiannidis, Nikola Zlatanov, “Relaying utilization metrics of diamond cooperative diversity systems”, In Wireless Pervasive Computing (ISWPC), 2010 5th IEEE International Symposium on, vol. , no. , pp. 551 -555, 2010. [bib] [pdf] [doi]

[75] N.D. Chatzidiamantis, H.G. Sandalidis, G.K. Karagiannidis, M. Matthaiou, “A Simple Statistical Model for Turbulence-Induced Fading in Free-Space Optical Systems”, In Communications (ICC), 2010 IEEE International Conference on, vol. , no. , pp. 1 -5, 2010. [bib] [pdf] [doi]

[74] V.M. Kapinas, V.K. Paraforou, C.A. Liondas, G.K. Karagiannidis, “Power Allocation for Quasi-Orthogonal Space-Time Block Codes with 1 or 2 Bits Feedback”, In Communications (ICC), 2010 IEEE International Conference on, vol. , no. , pp. 1 -6, 2010. [bib] [pdf] [doi]

[73] N.D. Chatzidiamantis, H.G. Sandalidis, G.K. Karagiannidis, S.A. Kotsopoulos, M. Matthaiou, “New results on turbulence modeling for free-space optical systems”, In Telecommunications (ICT), 2010 IEEE 17th International Conference on, vol. , no. , pp. 487 -492, 2010. [bib] [pdf] [doi]

[72] D. Michalopoulos, A.S. Lioumpas, G.K. Karagiannidis, R. Schober, “Switching Rate in Selective Cooperative Relaying”, In Wireless Communications and Networking Conference (WCNC), 2010 IEEE, vol. , no. , pp. 1 -6, 2010. [bib] [pdf] [doi]

[71] S.D. Assimonis, M. Matthaiou, G.K. Karagiannidis, J.A. Nossek, “Optimized x201C;better than x201D; raised-cosine pulse for reduced ICI in OFDM systems”, In Telecommunications (ICT), 2010 IEEE 17th International Conference on, vol. , no. , pp. 249 -252, 2010. [bib] [pdf] [doi]

[70] H.A. Suraweera, G.K. Karagiannidis, Yonghui Li, H.K. Garg, A. Nallanathan, B. Vucetic, “Amplify-and-Forward Relay Transmission with End-to-End Antenna Selection”, In Wireless Communications and Networking Conference (WCNC), 2010 IEEE, vol. , no. , pp. 1 -6, 2010. [bib] [pdf] [doi]

[69] D.S. Michalopoulos, H.A. Suraweera, G.K. Karagiannidis, R. Schober, “Amplify-and-Forward Relay Selection with Outdated Channel State Information”, In Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE, vol. , no. , pp. 1 -6, 2010. [bib] [pdf] [doi]

[68] Kyeong Jin Kim, T.A. Tsiftsis, G.K. Karagiannidis, “Average rate and outage probability of cyclic prefixed single-carrier opportunistic cooperative diversity systems”, In Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on, vol. , no. , pp. 2117 -2122, 2010. [bib] [pdf] [doi]

[67] N.D. Chatzidiamantis, A.S. Lioumpas, G.K. Karagiannidis, S. Arnon, “Optical Wireless Communications with Adaptive Subcarrier PSK Intensity Modulation”, In Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE, vol. , no. , pp. 1 -6, 2010. [bib] [pdf] [doi]

[66] Kyeong Jin Kim, T.A. Tsiftsis, G.K. Karagiannidis, “Average Spectral Efficiency of Opportunistic QRD-Based Cyclic Prefixed Single-Carrier Cooperative Diversity Systems with Power Allocation”, In Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE, vol. , no. , pp. 1 -5, 2010. [bib] [pdf] [doi]

2009

[65] Z. Hadzi-Velkov, N. Zlatanov, G.K. Karagiannidis, “An Accurate Approximation to the Distribution of the Sum of Equally Correlated Nakagami-m Envelopes and Its Application in Equal Gain Diversity Receivers”, In Communications, 2009. ICC ’09. IEEE International Conference on, vol. , no. , pp. 1 -5, 2009. [bib] [pdf] [doi]

[64] S.D. Assimonis, M. Matthaiou, G.K. Karagiannidis, J.A. Nossek, “Parametric Construction of Improved Nyquist Filters Based on Inner and Outer Functions”, In Communications, 2009. ICC ’09. IEEE International Conference on, vol. , no. , pp. 1 -5, 2009. [bib] [pdf] [doi]

[63] N.D. Chatzidiamantis, M. Uysal, T.A. Tsiftsis, G.K. Karagiannidis, “EM-Based Maximum-Likelihood Sequence Detection for MIMO Optical Wireless Systems”, In Communications, 2009. ICC ’09. IEEE International Conference on, vol. , no. , pp. 1 -5, 2009. [bib] [pdf] [doi]

[62] G.T. Djordjevic, I.B. Djordjevic, G.K. Karagiannidis, “On the Impact of Imperfect Cophasing in Uncoded and LDPC-Coded EGC Receivers over Generalized Fading Channels”, In Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE, vol. , no. , pp. 1 -6, 2009. [bib] [pdf] [doi]

[61] H.A. Suraweera, T.A. Tsiftsis, G.K. Karagiannidis, M. Faulkner, “Effect of Feedback Delay on Downlink Amplify-and-Forward Relaying with Beamforming”, In Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE, vol. , no. , pp. 1 -6, 2009. [bib] [pdf] [doi]

[60] N.D. Chatzidiamantis, G.K. Karagiannidis, D.S. Michalopoulos, “On the Distribution of the Sum of Gamma-Gamma Variates and Application in MIMO Optical Wireless Systems”, In Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE, vol. , no. , pp. 1 -6, 2009. [bib] [pdf] [doi]

[59] K.N. Pappi, A.S. Lioumpas, G.K. Karagiannidis, S.A. Kotsopoulos, “Performance Analysis of Variable-Angle Quadrature Amplitude Constellations”, In Wireless and Mobile Computing, Networking and Communications, 2009. WIMOB 2009. IEEE International Conference on, vol. , no. , pp. 314 -319, 2009. [bib] [pdf] [doi]

[58] A.S. Lioumpas, G.K. Karagiannidis, D.S. Michalopoulos, “Adaptive M-PSK Communications in the Absence of Channel Gain Estimation”, In Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE, vol. , no. , pp. 1 -6, 2009. [bib] [pdf] [doi]

2008

[57] D.S. Michalopoulos, A.S. Lioumpas, G.K. Karagiannidis, “Low Complexity Amplify and Forward Relaying without Channel Amplitude Estimation”, In Communications, 2008. ICC ’08. IEEE International Conference on, vol. , no. , pp. 4295 -4299, 2008. [bib] [pdf] [doi]

[56] T.A. Tsiftsis, H.G. Sandalidis, G.K. Karagiannidis, M. Uysal, “FSO Links with Spatial Diversity over Strong Atmospheric Turbulence Channels”, In Communications, 2008. ICC ’08. IEEE International Conference on, vol. , no. , pp. 5379 -5384, 2008. [bib] [pdf] [doi]

[55] Z. Hadzi-Velkov, N. Zlatanov, G.K. Karagiannidis, “Level Crossing Rate and Average Fade Duration of the Multihop Rayleigh Fading Channel”, In Communications, 2008. ICC ’08. IEEE International Conference on, vol. , no. , pp. 4451 -4455, 2008. [bib] [pdf] [doi]

[54] D.S. Michalopoulos, G.K. Karagiannidis, “Spectral Efficient Cooperative Communications via Spatial Signal Separation”, In Communications, 2008. ICC ’08. IEEE International Conference on, vol. , no. , pp. 1039 -1043, 2008. [bib] [pdf] [doi]

[53] S.K. Mihos, V.M. Kapinas, G.K. Karagiannidis, “Lower and upper bounds for the generalized Marcum and Nuttall Q-functions”, In Wireless Pervasive Computing, 2008. ISWPC 2008. 3rd International Symposium on, vol. , no. , pp. 736 -739, 2008. [bib] [pdf] [doi]

2007

[52] V.M. Kapinas, G.K. Karagiannidis, “On Decoupling of Quasi-Orthogonal Space-Time Block Codes based on Inherent Structure”, In Mobile and Wireless Communications Summit, 2007. 16th IST, vol. , no. , pp. 1 -5, 2007. [bib] [pdf] [doi]

[51] D.S. Michalopoulos, A.S. Lioumpas, G.K. Karagiannidis, “Increasing Power Efficiency in Transmitter Diversity Systems under Error Performance Constraints”, In Communications, 2007. ICC ’07. IEEE International Conference on, vol. , no. , pp. 4411 -4415, 2007. [bib] [pdf] [doi]

[50] D.S. Michalopoulos, G.K. Karagiannidis, T.A. Tsiftsis, “Introducing PHY-Layer Fairness in Amplify and Forward Cooperative Diversity Systems”, In Communications, 2007. ICC ’07. IEEE International Conference on, vol. , no. , pp. 4040 -4045, 2007. [bib] [pdf] [doi]

[49] A. Vanelli-Coralli, G.E. Corazza, G.K. Karagiannidis, P.T. Mathiopoulos, D.S. Michalopoulos, C. Mosquera, S. Papaharalabos, S. Scalise, “Satellite Communications: Research Trends and Open Issues”, In Satellite and Space Communications, 2007. IWSSC ’07. International Workshop on, vol. , no. , pp. 71 -75, 2007. [bib] [pdf] [doi]

[48] V.M. Kapinas, P. Horvath, G.K. Karagiannidis, I. Frigyes, “Time Synchronization Issues for Quasi-Orthogonal Space-Time Block Codes”, In Satellite and Space Communications, 2007. IWSSC ’07. International Workshop on, vol. , no. , pp. 66 -70, 2007. [bib] [pdf] [doi]

2006

[47] T.A. Tsiftsis, H.G. Sandalidis, G.K. Karagiannidis, N.C. Sagias, “Multihop Free-Space Optical Communications Over Strong Turbulence Channels”, In Communications, 2006. ICC ’06. IEEE International Conference on, vol. 6, no. , pp. 2755 -2759, 2006. [bib] [pdf] [doi]

[46] M.A. Gatzianas, L.G. Georgiadis, G.K. Karagiannidis, “Optimal Relay Control in Power-Constrained Dual-Hop Transmissions over Arbitrary Fading Channels”, In Communications, 2006. ICC ’06. IEEE International Conference on, vol. 10, no. , pp. 4543 -4548, 2006. [bib] [pdf] [doi]

[45] T.A. Tsiftsis, G.K. Karagiannidis, P.T. Mathiopoulos, “New Results on the Performance Evaluation of the Relay Fading Channel”, In Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd, vol. 4, no. , pp. 1630 -1634, 2006. [bib] [pdf] [doi]

[44] Diomidis S. Michalopoulos, George K. Karagiannidis, Theodoros A. Tsiftsis, “New Results for Wireless Multihop Diversity Systems”, In Wireless Conference 2006 – Enabling Technologies for Wireless Multimedia Communications (European Wireless), 12th European, vol. , no. , pp. 1 -7, 2006. [bib] [pdf] [doi]

[43] Athanasios S. Lioumpas, George K. Karagiannidis, Athanassios C. Iossifides, “Channel Quality Estimation Index (CQEI): An Improved Performance Criterion for Wireless Communications Systems Over Fading Channels”, In Wireless Conference 2006 – Enabling Technologies for Wireless Multimedia Communications (European Wireless), 12th European, vol. , no. , pp. 1 -6, 2006. [bib] [pdf] [doi]

[42] P.S. Bithas, P.T. Mathiopoulos, G.K. Karagiannidis, “Switched Diversity Receivers over Correlated Weibull Fading Channels”, In Satellite and Space Communications, 2006 International Workshop on, vol. , no. , pp. 143 -147, 2006. [bib] [pdf] [doi]

[41] D.S. Michalopoulos, G.K. Karagiannidis, T.A. Tsiftsis, R.K. Mallild, “WLC41-1: An Optimized User Selection Method for Cooperative Diversity Systems”, In Global Telecommunications Conference, 2006. GLOBECOM ’06. IEEE, vol. , no. , pp. 1 -6, 2006. [bib] [pdf] [doi]

2005

[40] G.K. Karagiannidis, T.A. Tsiftsis, R.K. Mallik, N.C. Sagias, S.A. Kotsopoulos, “Closed-form bounds for multihop relayed communications in Nakagami-m fading”, In Communications, 2005. ICC 2005. 2005 IEEE International Conference on, vol. 4, no. , pp. 2362 – 2366 Vol. 4, 2005. [bib] [pdf] [doi]

[39] N.C. Sagias, P.T. Mathiopoulos, P.S. Bithas, G.K. Karagiannidis, “On the Distribution of the Sum of Generalized Gamma Variates and Applications to Satellite Digital Communications”, In Wireless Communication Systems, 2005. 2nd International Symposium on, vol. , no. , pp. 785 -789, 2005. [bib] [pdf] [doi]

[38] P.S. Bithas, G.K. Karagiannidis, N.C. Sagias, D.A. Zogas, P.T. Mathiopoulos, “Dual-branch diversity receivers over correlated rician fading channels”, In Vehicular Technology Conference, 2005. VTC-2005-Fall. 2005 IEEE 62nd, vol. 4, no. , pp. 2642 – 2646, 2005. [bib] [pdf] [doi]

[37] G.K. Karagiannidis, N.C. Sagias, T. Mathiopoulos, “The N* Nakagami fading channel model”, In Wireless Communication Systems, 2005. 2nd International Symposium on, vol. , no. , pp. 185 – 189, 2005. [bib] [pdf] [doi]

[36] N.C. Sagias, G.K. Karagiannidis, P.S. Bithas, P.T. Mathiopoulos, “On the correlated weibull fading model and its applications”, In Vehicular Technology Conference, 2005. VTC-2005-Fall. 2005 IEEE 62nd, vol. 4, no. , pp. 2149 – 2153, 2005. [bib] [pdf] [doi]

[35] P.S. Bithas, N.C. Sagias, P.T. Mathiopoulos, G.K. Karagiannidis, A. Rontogiannis, “Digital Communications over Generalized-K Fading Channels”, In Wireless Communication Systems, 2005. 2nd International Symposium on, vol. , no. , pp. 684 -687, 2005. [bib] [pdf] [doi]

2004

[34] N.C. Sagias, G.K. Karagiannidis, D.A. Zogas, P.T. Mathiopoulos, G.S. Tombras, S.A. Kotsopoulos, “Dual selection diversity over correlated Weibull fading channels”, In Communications, 2004 IEEE International Conference on, vol. 6, no. , pp. 3384 – 3388 Vol.6, 2004. [bib] [pdf] [doi]

[33] D.A. Zogas, G.K. Karagiannidis, N.C. Sagias, T.A. Tsiftsis, P.T. Mathiopoulos, S.A. Kotsopoulos, “Dual hop wireless communications over Nakagami fading”, In Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, vol. 4, no. , pp. 2200 – 2204 Vol.4, 2004. [bib] [pdf] [doi]

[32] N.C. Sagias, G.K. Karagiannidis, D.A. Zogas, P.T. Mathiopoulos, S.A. Kotsopoulos, G.S. Tombras, “Performance of diversity receivers over non-identical Weibull fading channels”, In Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, vol. 1, no. , pp. 480 – 484 Vol.1, 2004. [bib] [pdf] [doi]

[31] N.C. Sagias, G.K. Karagiannidis, D.A. Zogas, P.T. Mathiopoulos, “Selection diversity for wireless communications with non-identical Weibull statistics”, In Global Telecommunications Conference, 2004. GLOBECOM ’04. IEEE, vol. 6, no. , pp. 3690 – 3694 Vol.6, 2004. [bib] [pdf] [doi]

[30] N.C. Sagias, G.K. Karagiannidis, D.A. Zogas, P.T. Mathiopoulos, G.S. Tombras, F.-N. Pavlidou, “Second order statistics and channel spectral efficiency for selection diversity receivers in Weibull fading”, In Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on, vol. 3, no. , pp. 2140 – 2145 Vol.3, 2004. [bib] [pdf] [doi]

[29] G.K. Karagiannidis, D.A. Zogas, N.C. Sagias, T.A. Tsiftsis, P.T. Mathiopoulos, “Multihop communications with fixed-gain relays over generalized fading channels”, In Global Telecommunications Conference, 2004. GLOBECOM ’04. IEEE, vol. 1, no. , pp. 36 – 40 Vol.1, 2004. [bib] [pdf] [doi]

2003

[28] D.A. Zogas, S.A. Kotsopoulos, G.K. Karagiannidis, P.T. Mathiopoulos, “Properties of the EGC output SNR over correlated generalized-fading channels”, In Global Telecommunications Conference, 2003. GLOBECOM ’03. IEEE, vol. 3, no. , pp. 1694 – 1698 vol.3, 2003. [bib] [pdf] [doi]

[27] D. A. Zogas, G. K. Karagiannidis, S. A. Kotsopoulos, “BER Analysis of Dual Equal Gain Diversity over Generalized Fading Channels”, In Proc. of IEEE Symposium on Computers and Communications (ISCC) 2003, Kemer-Antalya, Turkey, 2003. [bib]

[26] D. A. Zogas, G. K. Karagiannidis, S. A. Kotsopoulos, P. T. Mathiopoulos, “Properties of the EGC output SNR over Generalized-Fading Channels”, In Proc. of IEEE GLOBECOM 2003, San Francisco, USA, 2003. [bib]

2002

[25] D.A. Zogas, G.K. Karagiannidis, S.A. Kotsopoulos, P.T. Mathiopoulos, “An efficient approach to the exponentially correlated Rayleigh distribution”, In Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on, vol. 3, no. , pp. 1195 – 1199 vol.3, 2002. [bib] [pdf] [doi]

[24] D. A. Zogas, E. Dimopoulos, G. K. Karagiannidis, “Multi-Services Management Wireless Network with Bandwidth Optimization (MAMBO)”, In Proc. of International Conference on Telecommunications (ICT) 2002, Beijing, China, 2002. [bib]

[23] D. A. Zogas, K. G. Ioannou, S. A. Kotsopoulos, G. K. Karagiannidis, “Triple Diversity in Exponentially Correlated Nakagami-m Fading”, In Proc. of International Conference on Telecommunications (ICT) 2002, Beijing, China, 2002. [bib]

[22] D. A. Zogas, G. K. Karagiannidis, S. A. Kotsopoulos, P. T. Mathiopoulos, “New Results on the Exponentially Correlated Rayleigh Distribution”, In Proc. of IEEE Personal, Indoor and Mobile Radio Communications (PIMRC) 2002, Lisboa, Portugal, 2002. [bib]

2001

[21] K. Ioannou, S. Kotsopoulos, S. Bouzouki, G. Panoutsopoulos, G. K. Karagiannidis, “Blocking Probability Evaluation for Urban and Suburban Areas”, In 8th International Conference on Advances in Communication and Control, COMCON 8, Crete, Greece, 2001. [bib]

[20] G. K. Karagiannidis, S. A. Kotsopoulos, “On the Distribution of the Sum of L. m-Nakagami Independent Envelopes with Arbitrary Parameters”, In Proceedings of ICT 2001, Bucharest, Romania, 2001. [bib]

[19] S. Bouzouki, P. T. Mathiopoulos, G. K. Karagiannidis, “Service Availability and Capacity Improvement of Land Mobile Satellite-(LMSS) Using Diversity Techniques”, In Seventh International Workshop on Digital Signal Processing Techniques for Space Communications, Sesimbra, Portugal, 2001. [bib]

[18] K. Ioannou, S. Kotsopoulos, S. Bouzouki, I. Panoutsopoulos, G. K. Karagiannidis, “Hybrid Frequency Allocation Model based on Offered Traffic for G3G Systems”, In IASTED International Conference, Advances in Communications (AIC 2001), Rhodes, Greece, 2001. [bib]

[17] I. Panoutsopoulos, S. A. Kotsopoulos, S. Bouzouki, K. Ioannou, G. K. Karagiannidis, “On the Call Admission Policy Optimization for UMTS and IMT-2000 Systems”, In IASTED International Conference, Advances in Communications (AIC 2001), Rhodes, Greece, 2001. [bib]

[16] I. Panoutsopoulos, S. Kotsopoulos, S. Bouzouki, K. Ioannou, G. K. Karagiannidis, “On the Call Admission Policy Optimization for UMTS and IMT-2000 Systems”, In IASTED International Conference, Advances in Communications (AIC 2001), Rhodes, Greece, 2001. [bib]

2000

[15] G.K. Karagiannidis, S.A. Kotsopoulos, “Outage performance considerations in cellular systems: a comparative review”, In Vehicular Technology Conference, 2000. IEEE VTS-Fall VTC 2000. 52nd, vol. 2, no. , pp. 557 -564 vol.2, 2000. [bib] [pdf] [doi]

[14] G. K. Karagiannidis, C. Georgopoulos, S. A. Kotsopoulos, “On the Evaluation of Outage Performance in Micro- and Pico-cellular networks”, In 2000 International Workshop “Telecommunications: World Class Quality & Reliability for World Class Events”, IEEE ComSoc- CQR Technical Committee, Crete, Greece, 2000. [bib]

1999

[13] G. K. Karagiannidis, S. Bouzouki, C. Georgopoulos, S. Kotsopoulos, “Co-Channel Interference analysis for Rice desired signal in an environment of L Nakagami Interferers”, In International Workshop on Mobile Communications, Name of Publisher, Chania, Greece, 1999. [bib]

[12] G. K. Karagiannidis, S. Bouzouki, C. Georgopoulos, S. Kotsopoulos, “A Novel Master-Slave Based Architecture for Wireless Pico-cellular Communications”, In 7th International Conference on Advances in Communication and Control, COMCON 7, Athens, Greece, 1999. [bib]

[11] G. K. Karagiannidis, C. Georgopoulos, S. Kotsopoulos, “Outage Probability Analysis for Indoor Pico-cellular Communications Systems”, In 7th International Conference on Advances in Communication and Control, COMCON 7, Athens, Greece, 1999. [bib]

1998

[10] S. Bouzouki, G. K. Karagiannidis, S. Kotsopoulos, “On the optimum approximation of the Personal Communications Networks RF cell area”, In IEEE 49th Vehicular Technology Conference, Huston Texas, USA, 1998. [bib]

[9] G. K. Karagiannidis, C. Georgopoulos, S. Kotsopoulos, “On the performance evaluation issues of personal communications systems: An improved relation between co-channel interference probability and system’s capacity”, In International Conference on Telecommunications, Porto Carras, Greece, 1998. [bib]

[8] S. A. Kotsopoulos, D. Zevgolis, G. K. Karagiannidis, D. Karaboulas, A. Doukas, “H-DEC-TELNET: A new proposed wide-area Hybrid DECentralized TELecommunication NETworking Platform for the upgration of the ship-to-shore multi-servicing activities”, In International Conference on Naval Technology for the 21st Century, , 1998. [bib]

1997

[7] G. K. Karagiannidis, S. Kotsopoulos, “On the Development of a new Full Adaptive Channel Allocation Technique to Support High Capacity conditions of the Mobile Cellular Systems”, In 6th International Conference on Advances in Communication and Control, COMCON 6, Corfu, Greece, 1997. [bib]

[6] D. Karaboulas, G. K. Karagiannidis, A. Doukas, J. Katsenos, S. Kotsopoulos, “High Capacity Cellular Mobile Radio Communication Systems: The need of using fiber optics lines in order to support advanced teleworking services”, In 2nd International Conference on New Laser Technologies and Applications, Ancient Olympia, Greece, 1997. [bib]

[5] G. K. Karagiannidis, S. Kotsopoulos, “Determination of the Frequency Reuse Ratio and its dependence on the estimated interference probability in a cellular mobile radio communication system operating in a non-homogeneous cell size environment”, In International Conference of PhD Students, University of Miskolc, Hungary, 1997. [bib]

[4] G. K. Karagiannidis, A. Papatsoris, S. Bouzouki, S. Kotsopoulos, K. Pantazopoulos, G. Apostolopoulos, A. Doukas, D. Karaboulas, “On the RF indoor and open area propagation modelling at 900 MHz in Patras Area of Greece”, In International Conference of PhD Students, University of Miskolc, Hungary, 1997. [bib]

1996

[3] G. K. Karagiannidis, C. Georgopoulos, S. Kotsopoulos, D. Karaboulas, A. Doukas, “High Capacity Cellular Mobile Systems: On the Increase of Co-channel’s Interference Evaluation Accuracy”, In International Workshop on Mobile Communications, Thessaloniki, Greece, 1996. [bib]

1994

[2] G. Karagiannidis, C. Georgopoulos, “Transmission of Basic Rate ISDN signals in AWGN channels using GMSK modulation strategies”, In VITEL International Telecommunications Symposium, VITEL, Loubliana, Slovenia, 1994. [bib]

1992

[1] J. Gialelis, G. K. Karagiannidis, V. Kapsalis, L. Prentzas, C. Georgopoulos, “ISDN -to- Infrared Link”, In Intern. Symposium on Industrial Electronics, IEEE, Xian, P. R. China, 1992. [bib]

Patents

1. Apparatus, method and system for real-time satellite-aided localization of collapsed or damaged buildings after an earthquake or other disaster. GR Patent Pending, Application number: GR20080100797.

2. A technique for path selection and combining in wireless communication systems. GR Patent Pending, Application number:

3. Apparatus and method for combining signals without channel gain estimation in wireless communication systems. GR Patent Pending, Application number:

4. A method for spatially distributed switch-and-stay combining, using wireless relays. GR Patent Pending, Application number:

5. Apparatus and method for power allocation in multiple antennas wireless communication systems. GR Patent Pending, Application number: