Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems

Man On Pun*, Shang-Ho Tsai, C. C.Jay Kuo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

A maximum likelihood estimator (MLE) that jointly estimates the carrier frequency offset (CFO) and the channel response of each user in uplink OFDMA systems is investigated in this research. The proposed MLE distinguishes itself from existing methods by its applicability to more flexible carrier assignment schemes. It achieves high computational efficiency by transforming a multidimensional optimization problem into a one-dimensional optimization problem. A suboptimal method is developed to further reduce the computational complexity. It is demonstrated by simulation results that the proposed MLE can provide accurate CFO and channel estimation in both SISO and SIMO environments.

Original languageEnglish
Article number20
Pages (from-to)216-227
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5440
DOIs
StatePublished - 1 Dec 2004
EventDigital Wireless Communications VI - Orlando, FL, United States
Duration: 12 Apr 200413 Apr 2004

Keywords

  • Carrier frequency offset
  • Channel estimation
  • Maximum likelihood (ML)
  • OFDMA
  • Uplink synchronization

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