Carrier frequency offset compensation with successive cancellation in uplink OFDMA systems

Yücek T., ARSLAN H.

IEEE Transactions on Wireless Communications, vol.6, no.10, pp.3546-3551, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 6 Issue: 10
  • Publication Date: 2007
  • Doi Number: 10.1109/twc.2007.060273
  • Journal Name: IEEE Transactions on Wireless Communications
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3546-3551
  • Keywords: OFDMA, frequency offset, successive cancellation
  • Istanbul Medipol University Affiliated: Yes

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. © 2007 IEEE.