Many frequency-recovery algorithms for orthogonal frequency-division multiplexing systems are geared to recover offsets up to half the distance of the subcarriers. If the error is larger, an ambiguity of an integer number of subcarrier spacings is left. This paper develops a blind algorithm for ambiguity resolution that works effectively over frequency-selective radio channels. Simulation results show a sizable improvement over existing techniques, expecially at high signal-to-noise ratios.

Blind Frequency Ambiguity Resolution for OFDM Signals over Frequency-Selective Channels

LOTTICI, VINCENZO
Co-primo
Writing – Review & Editing
;
LUISE, MARCO
Co-primo
Writing – Review & Editing
;
REGGIANNINI, RUGGERO
Co-primo
Writing – Review & Editing
2004

Abstract

Many frequency-recovery algorithms for orthogonal frequency-division multiplexing systems are geared to recover offsets up to half the distance of the subcarriers. If the error is larger, an ambiguity of an integer number of subcarrier spacings is left. This paper develops a blind algorithm for ambiguity resolution that works effectively over frequency-selective radio channels. Simulation results show a sizable improvement over existing techniques, expecially at high signal-to-noise ratios.
Lottici, Vincenzo; Luise, Marco; Marselli, M; Reggiannini, Ruggero
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/89824
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