An EM-based joint maximum likelihood estimation of carrier frequency offset and channel for 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

32 Scopus citations

Abstract

A maximum likelihood estimator (MLE) based on Expectation Maximization (EM) method is presented to jointly estimate the carrier frequency offset (CFO) and the channel of each user in uplink OFDMA systems. The proposed MLE distinguishes itself from existing methods by its applicability to any arbitrary carrier assignment, schemes. The proposed MLE achieves high computational efficiency by transforming a multidimensional maximization problem into a number of substantially smaller separate maximization problems. Computer experiments have been conducted to confirm the effectiveness of the proposed estimators in estimation accuracy and robustness against the near-far effect.

Original languageEnglish
Pages (from-to)598-602
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume60
Issue number1
DOIs
StatePublished - 1 Dec 2004
Event2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
Duration: 26 Sep 200429 Sep 2004

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