Decision-directed fine synchronization in OFDM systems

Author

Shi, Kai ; Serpedin, Erchin ; Ciblat, Philippe

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

53

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

408

Lastpage

412

Abstract

A new decision-directed (DD) synchronization scheme is proposed for joint estimation of carrier frequency offset (CFO) and sampling clock frequency offset (SFO) in orthogonal frequency-division multiplexing (OFDM) systems. By exploiting the hard decisions, we report accurate estimators of residual CFO and small SFO. The performance analysis and simulation results indicate that the proposed novel DD scheme achieves much better performance than the conventional pilot-based schemes in both additive white Gaussian noise and frequency-selective channels.

Keywords

AWGN channels; OFDM modulation; frequency estimation; synchronisation; OFDM system; additive white Gaussian noise; carrier frequency offset estimation; conventional pilot-based scheme; decision-directed fine synchronization; frequency-selective channel; joint estimation; orthogonal frequency-division multiplexing; sampling clock frequency offset estimation; AWGN; Additive white noise; Clocks; Fast Fourier transforms; Frequency division multiplexing; Frequency estimation; Frequency synchronization; OFDM; Sampling methods; Timing; Carrier frequency offset (CFO); fast Fourier transform (FFT); orthogonal frequency-division multiplexing (OFDM); sampling clock frequency offset (SFO); synchronization;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2005.843463

Filename

1413583