Outage Probability Analysis and Power Allocation for Two-Way Relay Networks with User Selection and Outdated Channel State Information

Author

Lisheng Fan ; Xianfu Lei ; Pingzhi Fan ; Hu, Rose

Author_Institution

Provincial Key Lab. of Inf. Coding & Transm., Southwest Jiaotong Univ., Chengdu, China

Volume

16

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

638

Lastpage

641

Abstract

This paper considers a multiuser two-way relay network (TWRN) consisting of one base station (BS), one amplify-and-forward (AF) relay and K mobile stations (MSs) among which the Nth-best MS is selected to exchange information with the BS. Specifically, we study the impact of outdated channel state information (CSI) on the system over time-varying Rayleigh block-fading channels by deriving a tight closed-form lower bound for the outage probability. We also obtain an asymptotic outage probability expression for high signal-to-noise ratio (SNR). Moreover, by minimizing the asymptotic outage probability, we optimize the power allocation (PA) among the network nodes. Numerical and simulation results collaborate the proposed studies.

Keywords

Rayleigh channels; amplify and forward communication; mobile radio; multiuser channels; probability; amplify-and-forward relay; asymptotic outage probability; closed-form lower bound; information exchange; mobile stations; multiuser two-way relay network; network nodes; one base station; outdated channel state information; power allocation; signal-to-noise ratio; time-varying Rayleigh block-fading channels; user selection; Channel estimation; Channel state information; Delay; Relays; Resource management; Signal to noise ratio; Simulation; Two-way relay networks (TWRN); outage probability; outdated channel state information (CSI); power allocation (PA); user selection;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.031212.112448

Filename

6171803