Frequency Offset Compensation for OFDM Systems Using a Combined Autocorrelation and Wiener Filtering Scheme

• Autorzy: Ramadan Ali A. , Khanzada T. J. , Omar A.
• Języki publikacji: EN

Abstrakty

EN

One of the orthogonal frequency division multiplexing (OFDM) system disadvantages is its sensitivity to frequency offset and phase noise, which lead to losing the orthogonality between the subcarriers and thereby degrade the system performance. In this paper a joint scheme for frequency offset and pilot-based channel estimation is introduced in which the frequency offset is first estimated using an autocorrelation method, and then is fined further by applying an iterative phase correction by means of pilot-based Wiener filtering method. In order to verify the capability of the estimation algorithm, the scheme has been implemented and tested using a real measurement system in a multipath indoor environment. The results show the algorithm capability of compensating for the frequency offset with different transmission and channel conditions.

Słowa kluczowe

EN

channel characterization; frequency offset; OFDM measurement; Wiener filtering

• Wydawca: Instytut Łączności - Państwowy Instytut Badawczy
• Czasopismo: Journal of Telecommunications and Information Technology
• Rocznik: 2010
• Tom: nr 1
• Strony: 40--47
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Ramadan Ali A.

autor

Khanzada T. J.

autor

Omar A.

• Otto-von-Guericke University of Magdeburg, Institute for Electronic, Signal Processing and Communications (IESK), Chair of Microwave and Communication Engineering (HF), P.O. Box 4120, Universitaetsplatz 2, 39016 Magdeburg, Germany,

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