Carrier frequency offsets mitigation for broadband OFDM in a multiuser environment

Defeng Huang, Khaled Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

OFDM (Orthogonal Frequency Division Multiplexing) is an enabling technology for multimedia wireless communications due to its ability in mitigating the effects of multi-path propagation. However, OFDM is sensitive to the carrier frequency offset (CFO), which destroys the orthogonality among sub-carriers and induces inter -carrier interference (ICI). When OFDM is employed in a multiple access scenario, with clusters of sub-carriers allocated to different users (often referred to as OFDMA). CFOs induce both ICI and MUI (multi-user interference), which result in significant performance degradation. In this paper, the CFO estimation methodologies for OFDM/OFDMA are first reviewed. We then present a scheme to compensate for the CFOs in OFDMA systems. In the proposed scheme, circular convolutions are employed to reproduce the interference after the DFT (Discrete Fourier Transform) processing. The interference is then removed from the original received signal to reduce the MUI. Simulation resuIts show that the proposed scheme can significantly improve system performance.

Original languageEnglish
Title of host publicationPIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings
Pages1149-1153
Number of pages5
Volume2
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003 - Beijing, China
Duration: 7 Sep 200310 Sep 2003

Other

Other14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003
CountryChina
CityBeijing
Period7/9/0310/9/03

    Fingerprint

Keywords

  • Carrier frequency offsets correction
  • Interference cancellation
  • Multiple access
  • OFDM

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Huang, D., & Letaief, K. (2003). Carrier frequency offsets mitigation for broadband OFDM in a multiuser environment. In PIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings (Vol. 2, pp. 1149-1153). [1260291] https://doi.org/10.1109/PIMRC.2003.1260291