A general carrier frequency offset estimator for broadband OFDM

Defeng Huang, Khaled Letaief

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

Abstract

OFDM (Orthogonal Frequency Division Multiplexing) is a promising technology for future broadband wireless communications due to its capability in combating multipath fading. Carrier frequency offset (CFO), which can induce the loss of orthogonality among OFDM sub-carriers and significant performance degradation, needs to be estimated and compensated for. In this paper, we propose a general CFO estimator based on the maximum likelihood (ML) estimation criterion. It will be shown that with the same estimator architecture, CFO can be obtained using either training OFDM symbols, pilot tones, null sub-carriers, or a combination of them. Furthermore, by taking advantage of the channel side information, the performance of CFO estimation can be significantly improved. To demonstrate the capability of the proposed CFO estimator, we will consider an OFDM system using the signal structure of the IEEE WLAN standard 802.11a. Compared with previous work using null sub-carriers alone, it will be shown that by taking advantage of the pilot tones, null sub-carriers, and the channel statistics, the performance of CFO estimation can be improved by about 2dB.

Original languageEnglish
Title of host publication2005 Asia-Pacific Conference on Communications
Pages1083-1087
Number of pages5
Volume2005
DOIs
Publication statusPublished - 2005
Externally publishedYes
Event2005 Asia-Pacific Conference on Communications - Perth, Western Australia, Australia
Duration: 3 Oct 20055 Oct 2005

Other

Other2005 Asia-Pacific Conference on Communications
CountryAustralia
CityPerth, Western Australia
Period3/10/055/10/05

Fingerprint

Orthogonal frequency division multiplexing
Multipath fading
Maximum likelihood estimation
Wireless local area networks (WLAN)
Statistics
Degradation
Communication

Keywords

  • Carrier frequency offset
  • IEEE 802.11a
  • Null sub-carrier
  • OFDM

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Huang, D., & Letaief, K. (2005). A general carrier frequency offset estimator for broadband OFDM. In 2005 Asia-Pacific Conference on Communications (Vol. 2005, pp. 1083-1087). [1554231] https://doi.org/10.1109/APCC.2005.1554231

A general carrier frequency offset estimator for broadband OFDM. / Huang, Defeng; Letaief, Khaled.

2005 Asia-Pacific Conference on Communications. Vol. 2005 2005. p. 1083-1087 1554231.

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

Huang, D & Letaief, K 2005, A general carrier frequency offset estimator for broadband OFDM. in 2005 Asia-Pacific Conference on Communications. vol. 2005, 1554231, pp. 1083-1087, 2005 Asia-Pacific Conference on Communications, Perth, Western Australia, Australia, 3/10/05. https://doi.org/10.1109/APCC.2005.1554231
Huang D, Letaief K. A general carrier frequency offset estimator for broadband OFDM. In 2005 Asia-Pacific Conference on Communications. Vol. 2005. 2005. p. 1083-1087. 1554231 https://doi.org/10.1109/APCC.2005.1554231
Huang, Defeng ; Letaief, Khaled. / A general carrier frequency offset estimator for broadband OFDM. 2005 Asia-Pacific Conference on Communications. Vol. 2005 2005. pp. 1083-1087
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