Relay Selection Schemes for Cooperative Communications Systems Sensor Networks | Zendy

Sara Sahebdel | Zendy; Hamidreza Bakhshi | Zendy

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Relay Selection Schemes for Cooperative Communications Systems Sensor Networks

Author(s) -

Sara Sahebdel,

Hamidreza Bakhshi

Publication year - 2011

Publication title -

computer and information science

Language(s) - English

Resource type - Journals

eISSN - 1913-8997

pISSN - 1913-8989

DOI - 10.5539/cis.v4n2p88

Subject(s) - relay , computer science , bit error rate , selection (genetic algorithm) , power (physics) , wireless , fading , communications system , eigenvalues and eigenvectors , computer network , electronic engineering , telecommunications , channel (broadcasting) , artificial intelligence , engineering , physics , quantum mechanics

Due to being so effective to mitigate the fading effect of wireless channels relay networks have received so much attention recently. Especially because relays are typically small, power limited and low cost and also can remove the problem of attenuation of signal due to propagation loss. Moreover increasing the number of relays improves the system performance and also using more power. The system efficiency can be enhanced by selecting relays in better conditions. In this paper single and multiple relay selection schemes is proposed applying Principal Component Analysis (PCA) method. The main idea of PCA method is selecting relays according to the eigenvector corresponding to the largest eigenvalue of channels from source to the destination. The PCA method provides an acceptable tradeoff between better power and Bit Error Rate (BER) performances. The higher efficiency is achieved by Appling PCA which demonstrated in power performance and this management of total power usage makes relay networks more practical.

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