Carrier Frequency Offset Compensation with Successive Cancellation in Uplink OFDMA Systems

Author

Yücek, Tevfik ; Arslan, Hüseyin

Author_Institution

Univ. of South Florida, Tampa

Volume

6

Issue

10

fYear

2007

fDate

10/1/2007 12:00:00 AM

Firstpage

3546

Lastpage

3551

Abstract

Similar to OFDM systems, OFDMA systems also suffer from frequency mismatches between the receiver and the transmitter. However, the fact that each uplink user has a different frequency offset makes the compensation more challenging than that of OFDM systems. This letter proposes successive interference cancellation (SIC) for compensating the frequency offset in the uplink OFDMA systems. A decorrelator is used to remove the inter-carrier interference (ICI) within a user´s signal and successive cancellation is applied to mitigate the multi access interference (MAI) arising due to the frequency difference among uplink users. The proposed algorithm is shown to eliminate the interference and has a manageable complexity.

Keywords

OFDM modulation; frequency division multiple access; interference suppression; radio links; radiofrequency interference; carrier frequency offset compensation; decorrelator; multi access interference; successive cancellation; uplink OFDMA system; Discrete Fourier transforms; Frequency domain analysis; Frequency estimation; Frequency synchronization; Interference cancellation; Multiple access interference; OFDM; Signal processing; Signal processing algorithms; Silicon carbide;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2007.060273

Filename

4350304