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Heterogeneous cooperative relay selection with maximal‐ratio combining for multi‐radio access networks
Author(s) -
Peng MuGen,
Zhang Jie,
Wang WenBo,
Chen HsiaoHwa
Publication year - 2009
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.1069
Subject(s) - diversity gain , computer science , cooperative diversity , relay , node (physics) , array gain , computer network , mimo , antenna (radio) , fading , base station , selection (genetic algorithm) , maximal ratio combining , antenna diversity , telecommunications , topology (electrical circuits) , antenna array , power (physics) , decoding methods , electrical engineering , engineering , physics , channel (broadcasting) , structural engineering , quantum mechanics , artificial intelligence
Abstract In this paper, we present a hierarchical convergence scheme for multi‐radio access networks via heterogeneous cooperative relaying technique, where heterogeneous cooperative relay node (HCRN) acts as the convergence gateway and provides cooperative diversity and antenna array gains. The multiple antennas are configured on base station (BS), HCRN, and destination node (DS) to achieve the antenna array gain. Considering the power consumption and implementing complexity at HCRN, only a single antenna is configured at HCRN to transmit decoded packages to the destination node (DS). A joint heterogeneous cooperative relay selection and maximal‐ratio combining scheme is proposed to maximize both cooperative and multi‐user diversity (MUD) gains. Tight closed‐form expressions for the outage probability and average symbol error rate are derived to evaluate performances, which are related strictly to the cooperative relay selection scheme, multiple antenna configurations, and fading channels. The analytical and simulation results show that the numbers of HCRNs and DSs play identical roles in the performance improvement, while the antenna number of DS provides a more significant diversity gain. Thus, in a practical application, we should aim to achieve a high MUD gain, instead of approaching the cooperative diversity gain via deploying too many HCRNs. In addition, the antenna array gain via configuring multiple antennas in DSs is preferred because it is bigger than the MUD gain or the cooperative diversity gain. Copyright © 2009 John Wiley & Sons, Ltd.