Title :
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
fDate :
3/1/2005 12:00:00 AM
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;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2005.843463
