Reduced complexity carrier frequency offset estimation for OFDM systems

Defeng Huang, Khaled Letaief, Jianhua Lu

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

5 Citations (Scopus)

Abstract

In broadband wireless communications, extensive research has been devoted to Orthogonal Frequency Division Multiplexing (OFDM) due to its ability in mitigating the multi-path effects. In OFDM, however, carrier frequency offsets (CFO) induce the loss of orthogonality among the sub-carriers and this results in significant performance degradation. In this paper, we propose a reduced complexity algorithm for CFO estimation with the aid of null sub-carriers. Using only one training OFDM symbol with N sub-carriers, the estimation range of the proposed scheme can be N/2 times larger than conventional CFO estimation schemes. As a result, the precision of the oscillators can be significantly reduced, thus, enabling low cost implementation. This paper will also investigate null sub-carrier allocations for the proposed scheme. It will be shown that the allocations should be based upon some specific binary sequences such as the extended m-sequences proposed in this paper.

Original languageEnglish
Title of host publication2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1411-1415
Number of pages5
Volume3
ISBN (Print)0780383443
Publication statusPublished - 2004
Externally publishedYes
Event2004 IEEE Wireless Communications and Networking Conference, WCNC 2004 - Atlanta, GA, United States
Duration: 21 Mar 200425 Mar 2004

Other

Other2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
CountryUnited States
CityAtlanta, GA
Period21/3/0425/3/04

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Keywords

  • Carrier frequency offset
  • Maximum Likelihood estimation
  • OFDM

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Huang, D., Letaief, K., & Lu, J. (2004). Reduced complexity carrier frequency offset estimation for OFDM systems. In 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004 (Vol. 3, pp. 1411-1415). Institute of Electrical and Electronics Engineers Inc..