A Novel Method of Limited Channel Feedback for OFDMA Systems

Author

Kwon, Sunhyoung ; Lee, Namjeong ; Lee, Keonkook ; Kang, Joonhyuk ; Gye-Tae Gil ; Park, Se-Jun

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

fYear

2009

fDate

20-23 Sept. 2009

Firstpage

1

Lastpage

5

Abstract

In this paper, we propose a new limited channel feedback algorithm for Orthogonal Frequency Division Multiple Access (OFDMA) systems. The proposed method reports channel information of relative maximum and minimum points of the channel gain from users to base station (BS). Based on the feedback information, BS reconstructs the channel for all the subcarriers using linear interpolation. Compared with the full CSI reporting, the proposed scheme requires only 1/60 feedback information at the expense of 1% throughput loss. Simulation results show that the proposed scheme provides an attractive tradeoff between uplink feedback amount and downlink system performance compared to the conventional limited feedback techniques.

Keywords

OFDM modulation; frequency division multiple access; interpolation; telecommunication channels; CSI; OFDMA systems; base station; channel gain; channel information; channel state information; downlink system performance; limited channel feedback algorithm; linear interpolation; orthogonal frequency division multiple access systems; throughput loss; Base stations; Channel state information; Downlink; Frequency conversion; Quality of service; Resource management; Scheduling; State feedback; System performance; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th

Conference_Location

Anchorage, AK

ISSN

1090-3038

Print_ISBN

978-1-4244-2514-3

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2009.5378843

Filename

5378843