Outage Probability and Power Allocation for Amplify-and-Forward Cooperative Relaying Systems with Correlated Shadowing

Author

Liang Han ; Shihai Shao ; Ying Shen ; Chaojin Qing ; Youxi Tang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2013

fDate

2-5 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

In this paper, we investigate the effect of shadowing on optimal power allocation of amplify- and-forward cooperative relaying systems. Considering the joint effects of path loss, correlated shadowing and flat Rayleigh fading, the approximate outage probability at high signal-to- noise ratio (SNR) is first derived. Then we solve the power allocation problem by minimizing the approximate outage probability subject to a total power constraint. It is shown by the analytical results that the correlation coefficients and the standard deviations of shadowing have a significant impact on the optimal power allocation. The simulation results show that the proposed power allocation scheme yields about 2dB SNR gain compared to the equal power allocation in the high SNR regime.

Keywords

Rayleigh channels; amplify and forward communication; cooperative communication; correlation methods; probability; relay networks (telecommunication); resource allocation; amplify and forward cooperative relaying systems; correlated shadowing; correlation coefficients; flat Rayleigh fading; outage probability; path loss; power allocation; total power constraint; Correlation; Fading; Relays; Resource management; Shadow mapping; Signal to noise ratio; Standards;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2013 IEEE 78th

Conference_Location

Las Vegas, NV

ISSN

1090-3038

Type

conf

DOI

10.1109/VTCFall.2013.6692340

Filename

6692340