Asymmetric Pilot Subcarrier Allocation for OFDMA-Based Regenerative Dual-Hop Links

Author

Kim, Hyonseok ; Min, Hyunkee ; Wang, Hanho ; Kim, Youngju ; Hong, Daesik

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul

fYear

2007

fDate

22-25 April 2007

Firstpage

1821

Lastpage

1825

Abstract

An asymmetric pilot subcarrier allocation scheme (APSA) is proposed for orthogonal frequency division multiple access (OFDMA) systems which use regenerative relays. To achieve the best performance of regenerative relay systems, the performance of each hop should be balanced. When there is a direct link between the source and destination, APSA allocates pilot subcarriers asymmetrically to each hop to balance the performance. We show that APSA can improve the performance of the system based on the symbol error rate (SER) analysis and simulation results.

Keywords

OFDM modulation; error statistics; frequency division multiple access; OFDMA-based regenerative dual-hop links; asymmetric pilot subcarrier allocation scheme; orthogonal frequency division multiple access systems; regenerative relays; symbol error rate analysis; Analytical models; Channel estimation; Diversity methods; Error analysis; Frequency conversion; Performance analysis; Power system relaying; Protocols; Relays; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th

Conference_Location

Dublin

ISSN

1550-2252

Print_ISBN

1-4244-0266-2

Type

conf

DOI

10.1109/VETECS.2007.378

Filename

4212806