Analysis of subcarrier pairing in a cellular OFDMA relay link

Author

Riihonen, Taneli ; Wichman, Risto ; Hämäläinen, Jyri ; Hottinen, Ari

Author_Institution

Helsinki Univ. of Technol., Helsinki

fYear

2008

fDate

26-27 Feb. 2008

Firstpage

104

Lastpage

111

Abstract

We consider a cellular OFDMA relay link consisting of a base station (BS), an infrastructure-based amplify-and-forward relay node (RN) and N active mobile user equipments (UEs). We study how to optimally pair the BS-RN subcarriers with the RN-UE subcarriers when the K subcarriers in the RN-UE channel are assigned for the UEs using round robin scheduling. The main contribution is to analyze the performance of the system by deriving closed-form expressions for average end-to-end SNR and capacity. The calculated measures facilitate performance evaluation that illustrates the benefit of channel-adaptive subcarrier pairing over fixed pairing.

Keywords

OFDM modulation; cellular radio; frequency division multiple access; amplify-and-forward relay node; base station; cellular OFDMA relay link; mobile user equipments; round robin scheduling; subcarrier pairing; Base stations; Closed-form solution; Downlink; OFDM; Performance analysis; Power system relaying; Protocols; Relays; Round robin; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Smart Antennas, 2008. WSA 2008. International ITG Workshop on

Conference_Location

Vienna

Print_ISBN

978-1-4244-1756-8

Electronic_ISBN

978-1-4244-1757-5

Type

conf

DOI

10.1109/WSA.2008.4475544

Filename

4475544