George K. Karagiannidis

Michail Matthaiou, George K. Karagiannidis, Erik G. Larsson, Thomas L. Marzetta, Robert Schober: Guest EditorialLarge-Scale Multiple Antenna Wireless Systems. IEEE Journal on Selected Areas in Communications 31(2): 113-116 (2013)

Jiayi Zhang, Michail Matthaiou, George K. Karagiannidis, Haibo Wang, Zhenhui Tan: Gallager's Exponent Analysis of STBC MIMO Systems over η-μ and κ-μ Fading Channels. IEEE Transactions on Communications 61(3): 1028-1039 (2013)

Koralia N. Pappi, Nestor D. Chatzidiamantis, George K. Karagiannidis: Error Performance of Multidimensional Lattice Constellations - Part I: A Parallelotope Geometry Based Approach for the AWGN Channel. IEEE Transactions on Communications 61(3): 1088-1098 (2013)

Koralia N. Pappi, Nestor D. Chatzidiamantis, George K. Karagiannidis: Error Performance of Multidimensional Lattice Constellations - Part II: Evaluation over Fading Channels. IEEE Transactions on Communications 61(3): 1099-1110 (2013)

Diomidis S. Michalopoulos, Nestor D. Chatzidiamantis, Robert Schober, George K. Karagiannidis: The Diversity Potential of Relay Selection with Practical Channel Estimation. IEEE Transactions on Wireless Communications 12(2): 481-493 (2013)

Zoran Hadzi-Velkov, Diomidis S. Michalopoulos, George K. Karagiannidis, Robert Schober: On the Effect of Outdated Channel Estimation in Variable Gain Relaying: Error Performance and PAPR. IEEE Transactions on Wireless Communications 12(3): 1084-1097 (2013)

Diomidis S. Michalopoulos, Himal A. Suraweera, George K. Karagiannidis, Robert Schober: Amplify-and-Forward Relay Selection with Outdated Channel Estimates. IEEE Transactions on Communications 60(5): 1278-1290 (2012)

Hani Mehrpouyan, Ali A. Nasir, Steven D. Blostein, Thomas Eriksson, George K. Karagiannidis, Tommy Svensson: Joint Estimation of Channel and Oscillator Phase Noise in MIMO Systems. IEEE Transactions on Signal Processing 60(9): 4790-4807 (2012)

Yunfei Chen, George K. Karagiannidis, Hao Lu, Ning Cao: Novel Approximations to the Statistics of Products of Independent Random Variables and Their Applications in Wireless Communications. IEEE T. Vehicular Technology 61(2): 443-454 (2012)

Caijun Zhong, Michail Matthaiou, George K. Karagiannidis, Aiping Huang, Zhaoyang Zhang: Capacity Bounds for AF Dual-hop Relaying in G Fading Channels. IEEE T. Vehicular Technology 61(4): 1730-1740 (2012)

Bojana Z. Nikolic, Goran T. Djordjevic, George K. Karagiannidis: On the Effect of Imperfect Cophasing in MRC and EGC Receivers Over Correlated Weibull Fading. Wireless Personal Communications 62(1): 31-39 (2012)

Aimilia P. Doukeli, Athanasios S. Lioumpas, George K. Karagiannidis, Panayiotis Frangos: Increasing the Efficiency of Rake Receivers for Ultra-Wideband Applications. Wireless Personal Communications 62(3): 715-728 (2012)

Goran T. Djordjevic, Ivan B. Djordjevic, George K. Karagiannidis: Partially Coherent EGC Reception of Uncoded and LDPC-Coded Signals over Generalized Fading Channels. Wireless Personal Communications 66(1): 25-39 (2012)

Zoran Hadzi-Velkov, Diomidis S. Michalopoulos, George K. Karagiannidis, Robert Schober: Dual-hop amplify-and-forward transmission with imperfect channel estimates at the relay. ICC 2012: 4110-4115

Theofilos Chrysikos, Stavros Kotsopoulos, George K. Karagiannidis: Attenuation over distance and excess path loss for a large-area indoor commercial topology at 2.4 GHz. ICT 2012: 1-6

Yunfei Chen, George K. Karagiannidis, Hao Lu, Ning Cao: New analytical framework for the products of independent RVs with wireless applications. WCNC 2012: 103-108

Koralia N. Pappi, Nestor D. Chatzidiamantis, George K. Karagiannidis: A combinatorial geometrical approach to the error performance of multidimensional finite lattice constellations. WCNC 2012: 581-586

Vasilios M. Kapinas, George K. Karagiannidis: A universal MIMO approach for 3GPP wireless standards. WCNC 2012: 1936-1941

Koralia N. Pappi, Nestor D. Chatzidiamantis, Theodore N. Chronis, George K. Karagiannidis: Error Performance of . CoRR abs/1202.0296 (2012)

Koralia N. Pappi, Nestor D. Chatzidiamantis, Theodore N. Chronis, George K. Karagiannidis: Error Performance of Multidimensional Lattice Constellations-Part II: Evaluation over Fading Channels. CoRR abs/1202.0298 (2012)

Fotis Foukalas, George T. Karetsos, George K. Karagiannidis: Adaptive Modulation in OSA-based Cognitive Radio Networks. CoRR abs/1210.6910 (2012)

T. Hazim, George K. Karagiannidis, Theodoros A. Tsiftsis: Probability of early detection of ultra-wideband positioning sensor networks. IET Wireless Sensor Systems 1(3): 123-128 (2011)

Michail Matthaiou, Nestor D. Chatzidiamantis, George K. Karagiannidis: A New Lower Bound on the Ergodic Capacity of Distributed MIMO Systems. IEEE Signal Process. Lett. 18(4): 227-230 (2011)

Nestor D. Chatzidiamantis, George K. Karagiannidis: On the Distribution of the Sum of Gamma-Gamma Variates and Applications in RF and Optical Wireless Communications. IEEE Transactions on Communications 59(5): 1298-1308 (2011)

Nestor D. Chatzidiamantis, Athanasios S. Lioumpas, George K. Karagiannidis, Shlomi Arnon: Adaptive Subcarrier PSK Intensity Modulation in Free Space Optical Systems. IEEE Transactions on Communications 59(5): 1368-1377 (2011)

Michail Matthaiou, Nestor D. Chatzidiamantis, George K. Karagiannidis, Josef A. Nossek: ZF Detectors over Correlated K Fading MIMO Channels. IEEE Transactions on Communications 59(6): 1591-1603 (2011)

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis, Robert Schober: Cooperative Diversity With Mobile Nodes: Capacity Outage Rate and Duration. IEEE Transactions on Information Theory 57(10): 6555-6568 (2011)

Himal A. Suraweera, Theodoros A. Tsiftsis, George K. Karagiannidis, Arumugam Nallanathan: Effect of Feedback Delay on Amplify-and-Forward Relay Networks With Beamforming. IEEE T. Vehicular Technology 60(3): 1265-1271 (2011)

Caijun Zhong, Michail Matthaiou, George K. Karagiannidis, Tharm Ratnarajah: Generic Ergodic Capacity Bounds for Fixed-Gain AF Dual-Hop Relaying Systems. IEEE T. Vehicular Technology 60(8): 3814-3824 (2011)

Nestor D. Chatzidiamantis, Diomidis S. Michalopoulos, Emmanouil E. Kriezis, George K. Karagiannidis, Robert Schober: Relay Selection in Relay-Assisted Free Space Optical Systems. GLOBECOM 2011: 1-6

Diomidis S. Michalopoulos, Nestor D. Chatzidiamantis, Robert Schober, George K. Karagiannidis: Diversity Loss Due to Suboptimal Relay Selection. GLOBECOM 2011: 1-6

Michail Matthaiou, Nestor D. Chatzidiamantis, George K. Karagiannidis: On the sum rate of ZF detectors over correlated K fading MIMO channels. ICASSP 2011: 3244-3247

Nestor D. Chatzidiamantis, George K. Karagiannidis, Emmanouil E. Kriezis, Michail Matthaiou: Diversity Combining in Hybrid RF/FSO Systems with PSK Modulation. ICC 2011: 1-6

Diomidis S. Michalopoulos, Nestor D. Chatzidiamantis, Robert Schober, George K. Karagiannidis: Relay Selection with Outdated Channel Estimates in Nakagami-m Fading. ICC 2011: 1-6

Himal A. Suraweera, Diomidis S. Michalopoulos, Robert Schober, George K. Karagiannidis, Arumugam Nallanathan: Fixed Gain Amplify-and-Forward Relaying with Co-Channel Interference. ICC 2011: 1-6

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis, Robert Schober: Outage Rate and Outage Duration of Decode-and-Forward Cooperative Diversity Systems. ICC 2011: 1-6

Dimitrios S. Karas, George K. Karagiannidis, Robert Schober: Neural network based PHY-layer key exchange for wireless communications. PIMRC 2011: 1233-1238

Nestor D. Chatzidiamantis, Diomidis S. Michalopoulos, Emmanouil E. Kriezis, George K. Karagiannidis, Robert Schober: Protocols for Relay-Assisted Free-Space Optical Systems. CoRR abs/1105.3835 (2011)

Diomidis S. Michalopoulos, Nestor D. Chatzidiamantis, Robert Schober, George K. Karagiannidis: The Diversity Potential of Relay Selection with Practical Channel Estimation. CoRR abs/1108.3873 (2011)

Enis Kocan, Milica Pejanovic-Djurisic, Diomidis S. Michalopoulos, George K. Karagiannidis: Performance Evaluation of OFDM Amplify-and-Forward Relay System with Subcarrier Permutation. IEICE Transactions 93-B(5): 1216-1223 (2010)

Koralia N. Pappi, Athanasios S. Lioumpas, George K. Karagiannidis: theta-QAM: A parametric quadrature amplitude modulation family and its performance in AWGN and fading channels. IEEE Transactions on Communications 58(4): 1014-1019 (2010)

Athanasios S. Lioumpas, George K. Karagiannidis: Variable-rate M-PSK communications without channel amplitude estimation. IEEE Transactions on Communications 58(5): 1477-1484 (2010)

Diomidis S. Michalopoulos, Athanasios S. Lioumpas, George K. Karagiannidis, Robert Schober: Selective Cooperative Relaying over Time-Varying Channels. IEEE Transactions on Communications 58(8): 2402-2412 (2010)

Diomidis S. Michalopoulos, George K. Karagiannidis: Bypassing Orthogonal Relaying Transmissions via Spatial Signal Separation. IEEE Transactions on Communications 58(10): 3028-3038 (2010)

Michail Matthaiou, Paul de Kerret, George K. Karagiannidis, Josef A. Nossek: Mutual Information Statistics and Beamforming Performance Analysis of Optimized LoS MIMO Systems. IEEE Transactions on Communications 58(11): 3316-3329 (2010)

Nestor D. Chatzidiamantis, George K. Karagiannidis, Murat Uysal: Generalized Maximum-Likelihood Sequence Detection for Photon-Counting Free Space Optical Systems. IEEE Transactions on Communications 58(12): 3381-3385 (2010)

Michail Matthaiou, Nestor D. Chatzidiamantis, George K. Karagiannidis, Josef A. Nossek: On the capacity of generalized-K fading MIMO channels. IEEE Transactions on Signal Processing 58(11): 5939-5944 (2010)

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis: An efficient approximation to the correlated Nakagami-m sums and its application in equal gain diversity receivers. IEEE Transactions on Wireless Communications 9(1): 302-310 (2010)

Nestor D. Chatzidiamantis, Athanasios S. Lioumpas, George K. Karagiannidis, Shlomi Arnon: Optical Wireless Communications with Adaptive Subcarrier PSK Intensity Modulation. GLOBECOM 2010: 1-6

Kyeong Jin Kim, Theodoros A. Tsiftsis, George K. Karagiannidis: Average Spectral Efficiency of Opportunistic QRD-Based Cyclic Prefixed Single-Carrier Cooperative Diversity Systems with Power Allocation. GLOBECOM 2010: 1-5

Diomidis S. Michalopoulos, Himal A. Suraweera, George K. Karagiannidis, Robert Schober: Amplify-and-Forward Relay Selection with Outdated Channel State Information. GLOBECOM 2010: 1-6

Nestor D. Chatzidiamantis, Harilaos G. Sandalidis, George K. Karagiannidis, Michail Matthaiou: A Simple Statistical Model for Turbulence-Induced Fading in Free-Space Optical Systems. ICC 2010: 1-5

Vasilios M. Kapinas, Vasiliki K. Paraforou, Christos A. Liondas, George K. Karagiannidis: Power Allocation for Quasi-Orthogonal Space-Time Block Codes with 1 or 2 Bits Feedback. ICC 2010: 1-6

Kyeong Jin Kim, Theodoros A. Tsiftsis, George K. Karagiannidis: Average rate and outage probability of cyclic prefixed single-carrier opportunistic cooperative diversity systems. PIMRC 2010: 2117-2122

Diomidis S. Michalopoulos, Athanasios S. Lioumpas, George K. Karagiannidis, Robert Schober: Switching Rate in Selective Cooperative Relaying. WCNC 2010: 1-6

Himal A. Suraweera, George K. Karagiannidis, Yonghui Li, Hari Krishna Garg, Arumugam Nallanathan, Branka Vucetic: Amplify-and-Forward Relay Transmission with End-to-End Antenna Selection. WCNC 2010: 1-6

Nestor D. Chatzidiamantis, Athanasios S. Lioumpas, George K. Karagiannidis, Shlomi Arnon: Adaptive Subcarrier PSK Intensity Modulation in Free Space Optical Systems. CoRR abs/1002.1897 (2010)

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis: An efficient approximation to the correlated Nakagami-m sums and its application in equal gain diversity receivers. CoRR abs/1005.0734 (2010)

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis, Robert Schober: Cooperative Diversity with Mobile Nodes: Outage Capacity Rates and Durations. CoRR abs/1005.2061 (2010)

Himal A. Suraweera, Raymond H. Y. Louie, Yonghui Li, George K. Karagiannidis, Branka Vucetic: Two hop amplify-and-forward transmission in mixed rayleigh and rician fading channels. IEEE Communications Letters 13(4): 227-229 (2009)

George K. Karagiannidis, Shlomi Arnon, John R. Barry, Robert Schober, Murat Uysal: Guest editorial: optical wireless communications. IEEE Journal on Selected Areas in Communications 27(9): 1521-1525 (2009)

Zoran Hadzi-Velkov, Nikola Zlatanov, George K. Karagiannidis: On the second order statistics of the multihop rayleigh fading channel. IEEE Transactions on Communications 57(6): 1815-1823 (2009)

Vasilios M. Kapinas, Sotirios K. Mihos, George K. Karagiannidis: On the monotonicity of the generalized Marcum and Nuttall Q-functions. IEEE Transactions on Information Theory 55(8): 3701-3710 (2009)

Himal A. Suraweera, Diomidis S. Michalopoulos, George K. Karagiannidis: Performance of Distributed Diversity Systems With a Single Amplify-and-Forward Relay. IEEE T. Vehicular Technology 58(5): 2603-2608 (2009)

Theodoros A. Tsiftsis, Harilaos G. Sandalidis, George K. Karagiannidis, Murat Uysal: Optical wireless links with spatial diversity over strong atmospheric turbulence channels. IEEE Transactions on Wireless Communications 8(2): 951-957 (2009)

Himal A. Suraweera, George K. Karagiannidis, Peter J. Smith: Performance analysis of the dual-hop asymmetric fading channel. IEEE Transactions on Wireless Communications 8(6): 2783-2788 (2009)

Nestor D. Chatzidiamantis, George K. Karagiannidis, Diomidis S. Michalopoulos: On the Distribution of the Sum of Gamma-Gamma Variates and Application in MIMO Optical Wireless Systems. GLOBECOM 2009: 1-6

Athanasios S. Lioumpas, George K. Karagiannidis, Diomidis S. Michalopoulos: Adaptive M-PSK Communications in the Absence of Channel Gain Estimation. GLOBECOM 2009: 1-6

Himal A. Suraweera, Theodoros A. Tsiftsis, George K. Karagiannidis, Michael Faulkner: Effect of Feedback Delay on Downlink Amplify-and-Forward Relaying with Beamforming. GLOBECOM 2009: 1-6

Stylianos D. Assimonis, Michail Matthaiou, George K. Karagiannidis, Josef A. Nossek: Parametric Construction of Improved Nyquist Filters Based on Inner and Outer Functions. ICC 2009: 1-5

Nestor D. Chatzidiamantis, Murat Uysal, Theodoros A. Tsiftsis, George K. Karagiannidis: EM-Based Maximum-Likelihood Sequence Detection for MIMO Optical Wireless Systems. ICC 2009: 1-5

Zoran Hadzi-Velkov, Nikola Zlatanov, George 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. ICC 2009: 1-5

Goran T. Djordjevic, Ivan B. Djordjevic, George K. Karagiannidis: On the impact of imperfect cophasing in uncoded and LDPC-coded EGC receivers over generalized fading channels. WCNC 2009: 77-82

Koralia N. Pappi, Athanasios S. Lioumpas, George K. Karagiannidis, Stavros A. Kotsopoulos: Performance Analysis of Variable-Angle Quadrature Amplitude Constellations. WiMob 2009: 314-319

Athanasios S. Lioumpas, George K. Karagiannidis: Variable-Rate M-PSK Communications without Channel Amplitude Estimation. CoRR abs/0904.4926 (2009)

Diomidis S. Michalopoulos, Athanasios S. Lioumpas, George K. Karagiannidis, Robert Schober: Selective Cooperative Relaying over Time-Varying Channels. CoRR abs/0905.0564 (2009)

Nestor D. Chatzidiamantis, George K. Karagiannidis: On the Distribution of the Sum of Gamma-Gamma Variates and Applications in RF and Optical Wireless Communications. CoRR abs/0905.1305 (2009)

Zoran Hadzi-Velkov, Nikola Zlatanov, George 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. CoRR abs/0908.3539 (2009)

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis: Level Crossing Rate and Average Fade Duration of the Double Nakagami-m Random Process and Application in MIMO Keyhole Fading Channels. CoRR abs/0908.3541 (2009)

Zoran Hadzi-Velkov, Nikola Zlatanov, George K. Karagiannidis: On the Second Order Statistics of the Multihop Rayleigh Fading Channel. CoRR abs/0908.3544 (2009)

Zoran Hadzi-Velkov, Nikola Zlatanov, George K. Karagiannidis: Level Crossing Rate and Average Fade Duration of the Multihop Rayleigh Fading Channel. CoRR abs/0908.3549 (2009)

Aimilia P. Doukeli, Athanasios S. Lioumpas, George K. Karagiannidis, Panayiotis Frangos: Self-Reference Ultra-Wideband Systems. CoRR abs/0911.5153 (2009)

Ranjan K. Mallik, Arogyaswami Paulraj, Mrityunjoy Chakraborty, Keith Q. T. Zhang, George K. Karagiannidis: Distributed Space-Time Systems. EURASIP J. Adv. Sig. Proc. 2008 (2008)

Harilaos G. Sandalidis, Theodoros A. Tsiftsis, George K. Karagiannidis, Murat Uysal: BER Performance of FSO Links over Strong Atmospheric Turbulence Channels with Pointing Errors. IEEE Communications Letters 12(1): 44-46 (2008)

Himal A. Suraweera, George K. Karagiannidis: Closed-form error analysis of the non-identical Nakagami-m relay fading channel. IEEE Communications Letters 12(4): 259-261 (2008)

Stylianos D. Assimonis, Michail Matthaiou, George K. Karagiannidis: Two-parameter nyquist pulses with better performance. IEEE Communications Letters 12(11): 807-809 (2008)

Nikola Zlatanov, Zoran Hadzi-Velkov, George K. Karagiannidis: Level crossing rate and average fade duration of the double nakagami-m random process and application in MIMO keyhole fading channels. IEEE Communications Letters 12(11): 822-824 (2008)

Diomidis S. Michalopoulos, George K. Karagiannidis: Two-relay distributed switch and stay combining. IEEE Transactions on Communications 56(11): 1790-1794 (2008)

Diomidis S. Michalopoulos, Athanasios S. Lioumpas, George K. Karagiannidis: Increasing power efficiency in transmitter diversity systems under error performance constraints. IEEE Transactions on Communications 56(12): 2025-2029 (2008)

Petros L. Katsis, George K. Karagiannidis, Fotini-Niovi Pavlidou: Multi-user selection diversity for spread-spectrum multi-carrier multiple-access systems. IEEE Transactions on Communications 56(12): 2166-2177 (2008)

Diomidis S. Michalopoulos, George K. Karagiannidis: PHY-layer Fairness in Amplify and Forward Cooperative Diversity Systems. IEEE Transactions on Wireless Communications 7(3): 1073-1082 (2008)

Diomidis S. Michalopoulos, George K. Karagiannidis, Theodoros A. Tsiftsis, Ranjan K. Mallik: Distributed Transmit Antenna Selection (DTAS) Under Performance or Energy Consumption Constraints. IEEE Transactions on Wireless Communications 7(4): 1168-1173 (2008)

Diomidis S. Michalopoulos, George K. Karagiannidis: Performance analysis of single relay selection in rayleigh fading. IEEE Transactions on Wireless Communications 7(10): 3718-3724 (2008)

Athanasios S. Lioumpas, George K. Karagiannidis, Theodoros A. Tsiftsis: Adaptive generalized selection combining (A-GSC) receivers. IEEE Transactions on Wireless Communications 7(12-2): 5214-5219 (2008)

Diomidis S. Michalopoulos, George K. Karagiannidis: Spectral Efficient Cooperative Communications via Spatial Signal Separation. ICC 2008: 1039-1043

Diomidis S. Michalopoulos, Athanasios S. Lioumpas, George K. Karagiannidis: Low Complexity Amplify and Forward Relaying without Channel Amplitude Estimation. ICC 2008: 4295-4299

Zoran Hadzi-Velkov, Nikola Zlatanov, George K. Karagiannidis: Level Crossing Rate and Average Fade Duration of the Multihop Rayleigh Fading Channel. ICC 2008: 4451-4455

Theodoros A. Tsiftsis, Harilaos G. Sandalidis, George K. Karagiannidis, Murat Uysal: FSO Links with Spatial Diversity over Strong Atmospheric Turbulence Channels. ICC 2008: 5379-5384

Péter Horváth, George K. Karagiannidis, Peter R. King, Stavros Stavrou, István Frigyes: Investigations in Satellite MIMO Channel Modeling: Accent on Polarization. EURASIP J. Wireless Comm. and Networking 2007 (2007)

Athanasios S. Lioumpas, Aimilia P. Doukeli, George K. Karagiannidis: Another Look at Multibranch Switched Diversity Systems. IEEE Communications Letters 11(4): 325-327 (2007)

Diomidis S. Michalopoulos, George K. Karagiannidis: Distributed Switch and Stay Combining (DSSC) with a Single Decode and Forward Relay. IEEE Communications Letters 11(5): 408-410 (2007)

George K. Karagiannidis, Athanasios S. Lioumpas: An Improved Approximation for the Gaussian Q-Function. IEEE Communications Letters 11(8): 644-646 (2007)

George K. Karagiannidis, Nikos C. Sagias, P. Takis Mathiopoulos: Nast Nakagami: A Novel Stochastic Model for Cascaded Fading Channels. IEEE Transactions on Communications 55(8): 1453-1458 (2007)

Marios Gatzianas, Leonidas Georgiadis, George K. Karagiannidis: Gain Adaptation Policies for Dual-Hop Nonregenerative Relayed Systems. IEEE Transactions on Communications 55(8): 1472-1477 (2007)

Athanasios S. Lioumpas, George K. Karagiannidis: Blind Ratio Combining (BRC): An Optimum Diversity Receiver for Coherent Detection With Unknown Fading Amplitudes. IEEE Transactions on Communications 55(8): 1645-1645 (2007)

Athanasios S. Lioumpas, George K. Karagiannidis: Blind Ratio Combining (BRC): An Optimum Diversity Receiver for Coherent Detection With Unknown Fading Amplitudes. IEEE Transactions on Communications 55(9): 1725-1735 (2007)

Ranjan K. Mallik, George K. Karagiannidis: Equal-Gain Combining with Unequal Energy Constellations. IEEE Transactions on Wireless Communications 6(3): 1125-1132 (2007)

Athanasios S. Lioumpas, George K. Karagiannidis, Athanasios C. Iossifides: Channel Quality Estimation Index (CQEI): A Long-Term Performance Metric for Fading Channels and an Application in EGC Receivers. IEEE Transactions on Wireless Communications 6(9): 3315-3323 (2007)

Nikos C. Sagias, George K. Karagiannidis: Comments on "Average LCR and AFD for SC diversity over correlated Weibull fading channels". Wireless Personal Communications 43(2): 699-701 (2007)

Diomidis S. Michalopoulos, George K. Karagiannidis, Theodoros A. Tsiftsis: Introducing PHY-Layer Fairness in Amplify and Forward Cooperative Diversity Systems. ICC 2007: 4040-4045

Diomidis S. Michalopoulos, Athanasios S. Lioumpas, George K. Karagiannidis: Increasing Power Efficiency in Transmitter Diversity Systems under Error Performance Constraints. ICC 2007: 4411-4415

Sotirios K. Mihos, Vasilios M. Kapinas, George K. Karagiannidis: On the Monotonicity of the Generalized Marcum and Nuttall Q-Functions. CoRR abs/0712.4103 (2007)

George K. Karagiannidis, Chintha Tellambura, Sayandev Mukherjee, Abraham O. Fapojuwo: Multiuser Cooperative Diversity for Wireless Networks. EURASIP J. Wireless Comm. and Networking 2006 (2006)

Georgios S. Paschos, Ioannis Papapanagiotou, Stavros A. Kotsopoulos, George K. Karagiannidis: A New MAC Protocol with Pseudo-TDMA Behavior for Supporting Quality of Service in 802.11 Wireless LANs. EURASIP J. Wireless Comm. and Networking 2006 (2006)

Theodoros A. Tsiftsis, George K. Karagiannidis, P. Takis Mathiopoulos, Stavros A. Kotsopoulos: Nonregenerative Dual-Hop Cooperative Links with Selection Diversity. EURASIP J. Wireless Comm. and Networking 2006 (2006)

Petros S. Bithas, Nikos C. Sagias, P. Takis Mathiopoulos, George K. Karagiannidis, Athanasios A. Rontogiannis: On the performance analysis of digital communications over generalized-K fading channels. IEEE Communications Letters 10(5): 353-355 (2006)

George K. Karagiannidis: On the symbol error probability of general order rectangular qam in nakagami-m fading. IEEE Communications Letters 10(11): 745-747 (2006)

George K. Karagiannidis: A closed-form solution for the distribution of the sum of Nakagami-m random phase vectors. IEEE Communications Letters 10(12): 828-830 (2006)

N. V. Kokkalis, P. Takis Mathiopoulos, George K. Karagiannidis, Christos S. Koukourlis: Performance analysis of M-ary PPM TH-UWB systems in the presence of MUI and timing jitter. IEEE Journal on Selected Areas in Communications 24(4): 822-828 (2006)

George K. Karagiannidis, Theodoros A. Tsiftsis, Ranjan K. Mallik: Bounds for multihop relayed communications in nakagami-m fading. IEEE Transactions on Communications 54(1): 18-22 (2006)

George K. Karagiannidis, Nikos C. Sagias, Theodoros A. Tsiftsis: Closed-form statistics for the sum of squared Nakagami-m variates and its applications. IEEE Transactions on Communications 54(8): 1353-1359 (2006)

George K. Karagiannidis, Dimitris A. Zogas: Authors' reply [to comments on 'Infinite-series representations associated with the bivariate Rician distribution and their applications']. IEEE Transactions on Communications 54(8): 1512-1513 (2006)

George K. Karagiannidis: Performance bounds of multihop wireless communications with blind relays over generalized fading channels. IEEE Transactions on Wireless Communications 5(3): 498-503 (2006)

Nikos C. Sagias, George K. Karagiannidis, P. Takis Mathiopoulos, Theodoros A. Tsiftsis: On the performance analysis of equal-gain diversity receivers over generalized gamma fading channels. IEEE Transactions on Wireless Communications 5(10): 2967-2975 (2006)

Diomidis S. Michalopoulos, George K. Karagiannidis, Theodoros A. Tsiftsis, Ranjan K. Mallik: An Optimized User Selection Method for Cooperative Diversity Systems. GLOBECOM 2006

Theodoros A. Tsiftsis, Harilaos G. Sandalidis, George K. Karagiannidis, Nikos C. Sagias: Multihop Free-Space Optical Communications Over Strong Turbulence Channels. ICC 2006: 2755-2759

Marios Gatzianas, Leonidas Georgiadis, George K. Karagiannidis: Optimal Relay Control in Power-Constrained Dual-Hop Transmissions over Arbitrary Fading Channels. ICC 2006: 4543-4548

Theodoros A. Tsiftsis, George K. Karagiannidis, P. Takis Mathiopoulos: New Results on the Performance Evaluation of the Relay Fading Channel. VTC Spring 2006: 1630-1634

Dimitris A. Zogas, Nikos C. Sagias, George S. Tombras, George K. Karagiannidis: Communication Theory Average output SNR of equal-gain diversity receivers over correlative Weibull fading channels. European Transactions on Telecommunications 16(6): 521-525 (2005)

Nikos C. Sagias, George S. Tombras, George K. Karagiannidis: New results for the Shannon channel capacity in generalized fading channels. IEEE Communications Letters 9(2): 97-99 (2005)

Nikos C. Sagias, George K. Karagiannidis: Effects of carrier phase error on EGC receivers in correlated Nakagami-m fading. IEEE Communications Letters 9(7): 580-582 (2005)

George K. Karagiannidis, Theodoros A. Tsiftsis, Nikos C. Sagias: A closed-form upper-bound for the distribution of the weighted sum of Rayleigh variates. IEEE Communications Letters 9(7): 589-591 (2005)

Dimitris A. Zogas, George K. Karagiannidis: Infinite-series representations associated with the bivariate rician distribution and their applications. IEEE Transactions on Communications 53(11): 1790-1794 (2005)

Nikos C. Sagias, George K. Karagiannidis: Gaussian class multivariate Weibull distributions: theory and applications in fading channels. IEEE Transactions on Information Theory 51(10): 3608-3619 (2005)

Dimitris A. Zogas, George K. Karagiannidis, Stavros A. Kotsopoulos: Equal gain combining over Nakagami-n (rice) and Nakagami-q (Hoyt) generalized fading channels. IEEE Transactions on Wireless Communications 4(2): 374-379 (2005)

George K. Karagiannidis, Dimitris A. Zogas, Nikos C. Sagias, Stavros A. Kotsopoulos, George S. Tombras: Equal-gain and maximal-ratio combining over nonidentical Weibull fading channels. IEEE Transactions on Wireless Communications 4(3): 841-846 (2005)

Nikos C. Sagias, George K. Karagiannidis, Dimitris A. Zogas, George S. Tombras, Stavros A. Kotsopoulos: Average output SINR of equal-gain diversity in correlated Nakagami-m fading with cochannel interference. IEEE Transactions on Wireless Communications 4(4): 1407-1411 (2005)

George K. Karagiannidis, Theodoros A. Tsiftsis, Ranjan K. Mallik, Nikos C. Sagias, Stavros A. Kotsopoulos: Closed-form bounds for multihop relayed communications in Nakagami-m fading. ICC 2005: 2362-2366

Nikos C. Sagias, Panagiotis Varzakas, George S. Tombras, George K. Karagiannidis: Average channel capacity for generalized-selection combining RAKE receivers. European Transactions on Telecommunications 15(5): 497-500 (2004)

Nikos C. Sagias, Dimitris A. Zogas, George K. Karagiannidis, George S. Tombras: Channel capacity and second-order statistics in Weibull fading. IEEE Communications Letters 8(6): 377-379 (2004)

George K. Karagiannidis, Dimitris A. Zogas, Stavros A. Kotsopoulos: BER performance of dual predetection EGC in correlative Nakagami-m fading. IEEE Transactions on Communications 52(1): 50-53 (2004)

George K. Karagiannidis: Moments-based approach to the performance analysis of equal gain diversity in Nakagami-m fading. IEEE Transactions on Communications 52(5): 685-690 (2004)

Nikos C. Sagias, George K. Karagiannidis, Dimitris A. Zogas, P. Takis Mathiopoulos, George S. Tombras: Performance analysis of dual selection diversity in correlated Weibull fading channels. IEEE Transactions on Communications 52(7): 1063-1067 (2004)

Dimitris A. Zogas, George K. Karagiannidis, Stavros A. Kotsopoulos: On the average output SNR in selection combining with three correlated branches over Nakagami-m fading channels. IEEE Transactions on Wireless Communications 3(1): 25-28 (2004)

George K. Karagiannidis, Dimitris A. Zogas, Stavros A. Kotsopoulos: Statistical properties of the EGC output SNR over correlated Nakagami-m fading channels. IEEE Transactions on Wireless Communications 3(5): 1764-1769 (2004)

George K. Karagiannidis, Dimitris A. Zogas, Nikos C. Sagias, Theodoros A. Tsiftsis, P. Takis Mathiopoulos: Multihop communications with fixed-gain relays over generalized fading channels. GLOBECOM 2004: 36-40

Nikos C. Sagias, George K. Karagiannidis, Dimitris A. Zogas, P. Takis Mathiopoulos: Selection diversity for wireless communications with non-identical Weibull statistics. GLOBECOM 2004: 3690-3694

Nikos C. Sagias, George K. Karagiannidis, Dimitris A. Zogas, P. Takis Mathiopoulos, George S. Tombras, Stavros A. Kotsopoulos: Dual selection diversity over correlated Weibull fading channels. ICC 2004: 3384-3388

Nikos C. Sagias, George K. Karagiannidis, Dimitris A. Zogas, Panayiotis Takis Mathiopoulos, George S. Tombras, Fotini-Niovi Pavlidou: Second order statistics and channel spectral efficiency for selection diversity receivers in Weibull fading. PIMRC 2004: 2140-2145

George K. Karagiannidis, Dimitris A. Zogas, Stavros A. Kotsopoulos: On the multivariate Nakagami-m distribution with exponential correlation. IEEE Transactions on Communications 51(8): 1240-1244 (2003)

George K. Karagiannidis, Dimitris A. Zogas, Stavros A. Kotsopoulos: Performance analysis of triple selection diversity over exponentially correlated Nakagami-m fading channels. IEEE Transactions on Communications 51(8): 1245-1248 (2003)

George K. Karagiannidis, Dimitris A. Zogas, Stavros A. Kotsopoulos: An efficient approach to multivariate Nakagami-m distribution using Green's matrix approximation. IEEE Transactions on Wireless Communications 2(5): 883-889 (2003)

Dimitris A. Zogas, Stavros A. Kotsopoulos, George K. Karagiannidis, P. Takis Mathiopoulos: Properties of the EGC output SNR over correlated generalized-fading channels. GLOBECOM 2003: 1694-1698

Konstantinos Ioannou, Spiros Louvros, Ioannis C. Panoutsopoulos, Stavros Kotsopoulos, George K. Karagiannidis: Optimizing the handover call blocking probability in cellular networks with high speed moving terminals. IEEE Communications Letters 6(10): 422-424 (2002)

George K. Karagiannidis, Chris Georgopoulos, Stavros A. Kotsopoulos: Outage probability analysis for a nakagami signal in L nakagami interferers. European Transactions on Telecommunications 12(2): 145-150 (2001)