Open AccessMitigating shadowing effects through cluster‐head cooperation techniques
Author(s) -
Bithas Petros S.,
Lioumpas Athanasios S.,
Alexiou Angeliki
Publication year - 2013
Publication title -
iet networks
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 21
ISSN - 2047-4962
DOI - 10.1049/iet-net.2012.0136
Subject(s) - fading , multipath propagation , shadow mapping , computer science , nakagami distribution , fading distribution , algorithm , energy (signal processing) , gamma distribution , cluster (spacecraft) , wireless , electronic engineering , telecommunications , statistics , channel (broadcasting) , mathematics , computer network , artificial intelligence , rayleigh fading , engineering , decoding methods
In many situations the performance of wireless communication systems decreases especially when they operate over multipath fading channels subject also to shadowing. In this sense, cluster‐based networks have been introduced as an efficient solution, offering coverage extension and energy saving. In this study, the authors investigate new cluster‐head (CH) selection algorithms, where the nodes can select different CHs, according to the corresponding signal strength. In addition, it is shown that if CHs are equipped with multiple antennas, the negative consequences of fading/shadowing can be further reduced. The performance of this scheme is theoretically investigated over correlated Nakagami‐ m fading channels, which are also subject to shadow fading, modelled by gamma distribution. The derived statistical metrics are used to obtain numerical evaluated results for the outage and the average bit error probabilities. These results are complemented by computer simulated ones, which validate the accuracy of the proposed analysis.