Performance Analysis of Dual-Hop AF Relaying Systems over Mixed \eta\mu and \kappa \mu Fading Channels

• Published in: IEEE transactions on vehicular technology Vol. 62; no. 7; pp. 3149 - 3163
• Main Authors: Peppas, Kostas P., Alexandropoulos, George C., Mathiopoulos, P. Takis
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2013; Institute of Electrical and Electronics Engineers
• Subjects: Access methods and protocols, osi model; Amplification; Applied sciences; Approximation methods; Channels; Computer simulation; Connection and protection apparatus; Detection, estimation, filtering, equalization, prediction; Dual-hop systems; Electrical engineering. Electrical power engineering; error rate performance; eta - mu distribution; Exact sciences and technology; Exact solutions; Fading; fading channels; generalized Marcum- Q function; Information, signal and communications theory; kappa - mu distribution; Mathematical analysis; Mathematical models; Modulation; outage probability (OP); Performance analysis; Rayleigh channels; relay communications; Relaying; Relays; Signal and communications theory; Signal to noise ratio; Signal, noise; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Transmission and modulation (techniques and equipments); Performance evaluation; Line of sight propagation; Relaying; κ―μ distribution; Parameter estimation; Relay; Error probability; Current source converter; Dual-hop systems; Wireless telecommunication; Satellite telecommunication; Power system stability; Rice fading; Micromachine; Kappa mu distribution; error rate performance; Modeling; outage probability (OP); Channel estimation; Routing protocols; Fading channels; generalized function; Outage; Transmission protocol; Transmission channel; relay communications; Multihop network; Relay channel; Telecommunication system; Analytical method; μ―η distribution; Numerical simulation; Gain
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2013.2251026

This paper investigates the end-to-end performance of a dual-hop amplify-and-forward (AF) relaying communication system where the source-to-relay and the relay-to-destination channels are subject to different fading conditions. The relay is assumed to either possess perfect channel state information (CSI) or have a fixed gain. We consider the case where the one hop's channel is subject to η - μ fading, whereas the other hop's channel is subject to κ- μ fading. This mixed fading propagation channel is capable of accurately modeling various practical dual-hop transmissions. Examples of such environments are encountered in micro-/macrocellular systems and/or hybrid satellite/terrestrial wireless communication systems, where typically, only the one hop's channel has a line-of-sight (LOS) component. For both CSI-assisted and fixed-gain relaying and for integer-valued fading parameters, exact analytical expressions in the form of rapidly convergent infinite series for the outage probability (OP) and average bit error probability (ABEP) of several modulation schemes are derived. Moreover, for CSI-assisted relaying and arbitrary-valued fading parameters, closed-form lower bounds [tight for high values of the signal-to-noise ratio (SNR)] for the OP and ABEP performance are obtained. The analysis is also substantiated by obtaining previously published equivalent performance expressions as special cases of our generic fading models, namely, those available for Nakagami- m and Rice fading channels. In addition, the derived analytical expressions have been numerically evaluated, and the performance evaluation results have been further validated by comparing them with equivalent results that have been obtained by means of Monte Carlo computer simulations.