Channel-independent synchronization of orthogonal frequency division multiple access systems

by: S Barbarossa, M Pompili, GB Giannakis

Selected Areas in Communications, IEEE Journal on, Vol. 20, No. 2. (2002), pp. 474-486.

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Abstract

We develop synchronization algorithms for both the downlink and the uplink of quasi-synchronous and asynchronous orthogonal frequency division multiple access systems. Unlike existing alternatives, the proposed time- and carrier-offset estimators do not require the transmission of known sequences and exhibit performance independent of the underlying channel zero locations. The only necessary assumption is that there are virtual subcarriers which are not occupied by any user. We derive a closed-form variance expression for the carrier-offset estimator at high signal-to-noise ratio (SNR), as a function of the number of active users and the SNR. We compare our method with alternative ones and validate our theoretical derivations with simulation results

@article{citeulike:2706828, abstract = {We develop synchronization algorithms for both the downlink and the uplink of quasi-synchronous and asynchronous orthogonal frequency division multiple access systems. Unlike existing alternatives, the proposed time- and carrier-offset estimators do not require the transmission of known sequences and exhibit performance independent of the underlying channel zero locations. The only necessary assumption is that there are virtual subcarriers which are not occupied by any user. We derive a closed-form variance expression for the carrier-offset estimator at high signal-to-noise ratio (SNR), as a function of the number of active users and the SNR. We compare our method with alternative ones and validate our theoretical derivations with simulation results}, author = {Barbarossa, S. and Pompili, M. and Giannakis, G. B. }, booktitle = {Selected Areas in Communications, IEEE Journal on}, citeulike-article-id = {2706828}, doi = {10.1109/49.983375}, journal = {Selected Areas in Communications, IEEE Journal on}, keywords = {ofdma, synchronization}, number = {2}, pages = {474--486}, posted-at = {2008-04-23 11:11:51}, priority = {2}, title = {Channel-independent synchronization of orthogonal frequency division multiple access systems}, url = {http://dx.doi.org/10.1109/49.983375}, volume = {20}, year = {2002} }

RIS record

TY - JOUR ID - citeulike:2706828 L3 - citeulike-article-id:2706828 TI - Channel-independent synchronization of orthogonal frequency division multiple access systems T2 - Selected Areas in Communications, IEEE Journal on JF - Selected Areas in Communications, IEEE Journal on VL - 20 IS - 2 SP - 474 EP - 486 N2 - We develop synchronization algorithms for both the downlink and the uplink of quasi-synchronous and asynchronous orthogonal frequency division multiple access systems. Unlike existing alternatives, the proposed time- and carrier-offset estimators do not require the transmission of known sequences and exhibit performance independent of the underlying channel zero locations. The only necessary assumption is that there are virtual subcarriers which are not occupied by any user. We derive a closed-form variance expression for the carrier-offset estimator at high signal-to-noise ratio (SNR), as a function of the number of active users and the SNR. We compare our method with alternative ones and validate our theoretical derivations with simulation results KW - ofdma KW - synchronization AU - Barbarossa, S AU - Pompili, M AU - Giannakis, GB PY - 2002/// UR - http://dx.doi.org/10.1109/49.983375 ER -

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