Search Results - "Peppas, K"

Improving the availability of terrestrial FSO links over log normal atmospheric turbulence channels using dispersive chirped Gaussian pulses by Stassinakis, A.N., Nistazakis, H.E., Peppas, K.P., Tombras, G.S.

“…In this work, the influence of group velocity dispersion on the availability of a turbulent free space optical channel modeled with the log normal distribution…”
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A trivariate nakagami-m distribution with arbitrary covariance matrix and applications to generalized-selection diversity receivers by Peppas, K., Sagias, N.C.

“…This paper deals with a trivariate Nakagami-m distribution derived from the diagonal elements of a Wishart matrix. For this distribution, infinite series…”
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Probability of fade estimation for FSO links with time dispersion and turbulence modeled with the gamma–gamma or the I-K distribution by Varotsos, G.K., Stassinakis, A.N., Nistazakis, H.E., Tsigopoulos, A.D., Peppas, K.P., Aidinis, C.J., Tombras, G.S.

“…In this work, we study the influence of the time dispersion and atmospheric turbulence effects on the performance of a free space optical communication system,…”
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Radiological and instrumental neutron activation analysis determined characteristics of size-fractionated fly ash by Peppas, T.K., Karfopoulos, K.L., Karangelos, D.J., Rouni, P.K., Anagnostakis, M.J., Simopoulos, S.E.

“…The concentration of trace elements and radionuclides in fly ash particles of different size can exhibit significant variation, due to the various processes…”
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System level performance evaluation of MIMO and SISO OFDM-based WLANs by Peppas, K., Lazarakis, F., Axiotis, D. I., Al-Gizawi, T., Alexandridis, A. A.

“…In this paper we investigate the system level performance of an Orthogonal Frequency Division Multiplexing (OFDM) Wireless LAN network enhanced through…”
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Error rate analysis of threshold-based hybrid selection/maximal-ratio diversity over correlated nakagami-m fading channels by Sagias, N.C., Peppas, K.

“…An exact performance analysis of triple-branch threshold-based hybrid selection/maximal-ratio combining (T-HS/MRC) receivers over correlated Nakagami-m fading…”
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Services in interworking 3G and WLAN environments by Axiotis, D.I., Al-Gizawi, T., Peppas, K., Protonotarios, E.N., Lazarakis, F.I., Papadias, C., Philippopoulos, P.I.

“…Interworking WLANs and 3G mobile networks are expected to provide ubiquitous wireless communications at high data rates and a large variety of services with…”
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A New Formula for the Average Bit Error Probability of Dual-Hop Amplify-and-Forward Relaying Systems over Generalized Shadowed Fading Channels by Peppas, K. P.

“…In this letter we propose a unified analytical expression for the average bit error probability of dual-hop amplify- and-forward relaying systems operating in…”
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Interoperability criteria, mechanisms, and evaluation of system performance for transparently interoperating WLAN and UMTS-HSDPA networks by Al-Gizawi, T., Peppas, K., Axiotis, D.I., Protonotarios, E.N., Lazarakis, F.

“…The main challenge in the development of future wireless communication systems is to provide users with a wide range of services across different radio access…”
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A Simple, Accurate Approximation to the Sum of Gamma-Gamma Variates and Applications in MIMO Free-Space Optical Systems by Peppas, K P

“…In this letter, we propose a simple accurate closed-form approximation to the probability density function (pdf) of the sum of independent, identically…”
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Moments generating function of the harmonic mean of two non-identical gamma random variables and its applications in wireless communications by Peppas, Kostas

“…In this paper, a closed-form expression for the moments generating function of the half-harmonic mean of two independent, not necessarily identically…”
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Sum of Nonidentical Squared \kappa \mu Variates and Applications in the Performance Analysis of Diversity Receivers by Peppas, K. P.

“…In this paper, a generalized Laguerre polynomial expansion for the probability density function and the cumulative distribution function of the sum of…”
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Design and control of the interconnecting network of the access segment of mobile communications systems by Sarantinopoulos, C., Karagiannis, D., Peppas, K., Demestichas, P., Tzifa, E., Demesticha, V., Theologou, M.

“…In mobile communication systems, the network segment interconnecting the Base Station (BS) layout with the Base Station Controllers (BSCs) and the BSCs with…”
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Error performance of digital modulation schemes with MRC diversity reception over [eta]-[mu] fading channels by Peppas, K, Lazarakis, F, Alexandridis, A, Dangakis, K

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Error performance of digital modulation schemes with MRC diversity reception over η-μ fading channels by Peppas, K., Lazarakis, F., Alexandridis, A., Dangakis, K.

“…This paper provides exact-form expressions for the average symbol error probability (ASEP) of various digital modulation schemes with maximal ratio combining…”
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Statistical Analysis for On-Body Spatial Diversity Communications at 2.45 GHz by Michalopoulou, A., Alexandridis, A. A., Peppas, K., Zervos, T., Lazarakis, F., Dangakis, K., Kaklamani, D. I.

“…An investigation of the fading experienced by on-body diversity channels at 2.45 GHz is presented by focusing on the effects of the receive antennas position…”
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Evaluation of interoperability mechanisms for coexisting HSDPA and WLAN enhanced with MTMR techniques by Pintenet, R., Gosteau, J., Al-Gizawi, T., Lazarakis, F., Peppas, K., Alexiou, A.

“…Concept for 4G systems can be seen as the seamless inter-working between existing and 3G radio networks providing the user with a wide variety of services,…”
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Average capacity of optical wireless communication systems over I-K atmospheric turbulence channels by Peppas, K. P., Stassinakis, A. N., Topalis, G. K., Nistazakis, H. E., Tombras, G. S.

“…In this paper, we derive mathematical expressions for the evaluation of the average (ergodic) capacity of free-space optical (FSO) communication systems…”
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Performance evaluation of triple-branch GSC diversity receivers over generalized-K fading channels by Peppas, K.P.

“…In this letter, a detailed performance analysis of generalized selection combining GSC(2,3) receivers operating over independent but not necessarily…”
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On-body channel modelling: Measurements and statistical analysis by Michalopoulou, A, Alexandridis, A A, Peppas, K, Zervos, T, Lazarakis, F, Dangakis, K, Kaklamani, D I

“…This paper investigates the propagation phenomena and the fading experienced by on-body channels at 2.45 GHz, focusing on the effect of the human body. This…”
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