@conference {Athaudage2002A-low-complexit,
title = {A low complexity timing and frequency synchronization algorithm for OFDM systems},
booktitle = {Global Telecommunications Conference, 2002. GLOBECOM {\textquoteright}02. IEEE},
volume = {1},
year = {2002},
month = {nov.},
pages = {244 - 248 vol.1},
abstract = {The paper presents a low complexity discrete stochastic approximation algorithm for time and frequency synchronization in OFDM systems. The proposed technique can track the conditions of a slowly time varying channel where synchronization parameters, namely the symbol timing and frequency offset, vary slowly with time. The most important property of the proposed algorithm is its self-learning capability - it spends most of the computational effort at the global minimizer of the objective function. In particular, we show that the algorithm achieves an $\#$949;=(1- rho;)/(1+ rho;) reduction in computational cost (in terms of complex multiplications to be performed), where rho;=Ncp/N is the ratio between cyclic prefix length (Ncp) and number of subcarriers (N) of the OFDM system (e.g. N=512 and Ncp=64 gives $\#$949;=78\%). Numerical examples illustrate the synchronization accuracy of the proposed technique in terms of symbol timing and frequency offset estimation errors.},
keywords = {approximation theory, complex multiplications, computational complexity, computational cost, cyclic prefix length, discrete stochastic approximation algorithm, estimation errors, frequency estimation, frequency synchronization, minimisation, objective function minimizer, OFDM modulation, OFDM systems, self-learning capability, stochastic optimization, stochastic processes, symbol timing synchronization, synchronisation, time-varying channels, timing},
doi = {10.1109/GLOCOM.2002.1188077},
url = {http://dx.doi.org/10.1109/GLOCOM.2002.1188077},
author = {Athaudage, C.R.N. and Krishnamurthy, V.}
}