Title :
A Decentralized Power Allocation Scheme for Amplify-And-Forward Multi-Hop Relaying Systems
Author :
Farhadi, Golnaz ; Beaulieu, Norman C.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
Abstract :
A decentralized power allocation scheme for amplify-and-forward (AF) multi-hop relaying systems is proposed. The scheme maximizes a harmonic mean-based approximate expression for the instantaneous received signal-to-noise ratio (SNR). The outage probability in Rayleigh fading of the proposed power-optimized system is evaluated. Numerical results show the superior performance of AF multi-hop relaying systems employing the proposed power allocation scheme over those with uniform power allocation. The asymptotic outage behavior for sufficiently large values of SNR is also studied and it is demonstrated that AF multi-hop relaying systems employing the proposed power allocation scheme achieve diversity order 2.
Keywords :
Batteries; Communications Society; Cooperative systems; Fading; Power system relaying; Power system reliability; Rayleigh channels; Relays; Signal to noise ratio; Wireless sensor networks;
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town, South Africa
Print_ISBN :
978-1-4244-6402-9
DOI :
10.1109/ICC.2010.5501940
