Optimal Power Allocation Algorithm for OFDM-Based Decode-and-Forward Dual-Hop Cognitive Systems

Author

Shaat, Musbah ; Bader, F.

Author_Institution

Centre Tecnol. de Telecomunicacions de Catalunya (CTTC), Castelldefels-Barcelona, Spain

fYear

2011

fDate

15-18 May 2011

Firstpage

1

Lastpage

5

Abstract

Relayed transmission is a promising technique to increase coverage and achievable capacity of the communication systems. A cognitive OFDM-based decode-and-forward (DF) cooperative relay network is considered in this paper. The objective of the problem is to maximize the capacity of the cognitive radio (CR) system while guaranteeing that the interference introduced to the primary system is below the prescribed interference temperature limit. The optimal power allocation in the source and the relay is presented and a low computational complexity near-optimal algorithm is proposed. The simulation results confirm the efficiency of the proposed algorithm.

Keywords

OFDM modulation; cognitive radio; computational complexity; decode and forward communication; radiofrequency interference; CR system; OFDM-based decode-and-forward dual-hop cognitive systems; cognitive radio system; computational complexity; interference temperature limit; optimal power allocation algorithm; primary system; Cognitive radio; Interference; OFDM; Optimization; Relays; Resource management; Strontium;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd

Conference_Location

Budapest

ISSN

1550-2252

Print_ISBN

978-1-4244-8332-7

Type

conf

DOI

10.1109/VETECS.2011.5956165

Filename

5956165