Joint Optimal Power Allocation and Relay Location for Amplify-and-Forward Multihop Relaying over Lognormal Channel

Author

Kundu, Chinmoy ; Bose, Ranjan

Author_Institution

Bharti Sch. of Telecomm. Technol. & Mgmt., Indian Inst. of Technol., New Delhi, New Delhi, India

fYear

2013

fDate

2-5 June 2013

Firstpage

1

Lastpage

5

Abstract

In this paper, a joint optimization of power allocation (PA) and relay location is proposed for Amplify-and-Forward (AF) multihop relaying over independent lognormal fading channels. The proposed optimization method maximizes the end-to-end (e2e) average signal-to- noise ratio (ASNR) having constraints on total transmit power with no per terminal maximum limit and assuming fixed e2e distance. Optimal parameters do not depend on instantaneous channel state information (ICSI) and can reduce complexity and power consumption. Optimal PA for maximizing e2e instantaneous SNR (ISNR) is also derived considering same constraints. Outage performance of joint optimization method based on ASNR and optimization method based on ISNR is compared. It is observed that joint optimization not only performs better than equal allocation, it can also outperform PA based on ISNR when link unbalance is large.

Keywords

amplify and forward communication; fading channels; optimisation; relay networks (telecommunication); AF multihop relaying; ISNR; PA; amplify-and-forward multihop relaying; average signal-to-noise ratio; e2e instantaneous SNR; end-to-end ASNR; independent lognormal fading channels; optimal power allocation; optimization method; relay location; Fading; Joints; Optimization; Relays; Resource management; Signal to noise ratio; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th

Conference_Location

Dresden

ISSN

1550-2252

Type

conf

DOI

10.1109/VTCSpring.2013.6692610

Filename

6692610