Decision-directed fine synchronization for coded OFDM systems

Author

Shi, K. ; Serpedin, E. ; Ciblat, P.

Author_Institution

Texas A&M Univ., College Station, TX, USA

Volume

4

fYear

2004

fDate

17-21 May 2004

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 coded orthogonal frequency division multiplexing (OFDM) systems. By exploiting the decisions provided by a Viterbi decoder and the information available on all the modulated subcarriers, we report accurate estimators of residual CFO and small SFO without relying on pilots. 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 AWGN and frequency-selective channels.

Keywords

AWGN channels; OFDM modulation; Viterbi decoding; decision theory; frequency estimation; signal sampling; synchronisation; AWGN channels; Viterbi decoder; carrier frequency offset; coded OFDM systems; decision-directed fine synchronization; frequency-selective channels; joint estimation; modulated subcarriers; performance analysis; residual CFO; sampling clock frequency offset; simulation; small SFO; AWGN; Analytical models; Clocks; Decoding; Frequency estimation; Frequency synchronization; OFDM modulation; Performance analysis; Sampling methods; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-8484-9

Type

conf

DOI

10.1109/ICASSP.2004.1326839

Filename

1326839