Joint CFO and channel estimation for OFDMA uplink: an application of the variable projection method
IEEE Transactions on Wireless Communications
A high performance baseband transceiver for SISO-/MIMO-OFDMA uplink communications
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Low complexity pilot aided frequency synchronization for OFDMA uplink transmission
IEEE Transactions on Wireless Communications
Low complexity iterative detection for OFDMA uplink with frequency offsets
IEEE Transactions on Wireless Communications
Iterative carrier-frequency offset estimation for generalized OFDMA uplink transmission
IEEE Transactions on Wireless Communications
On pilot design for channel estimation and MUI reduction in uplink OFDMA systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Iterative detection for OFDMA uplink with frequency offsets
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Multiple CFOs in OFDM-SDMA uplink: interference analysis and compensation
EURASIP Journal on Wireless Communications and Networking - Special issue on synchronization in wireless communications
LMSE-based parameter acquisition for multicarrier CDMA systems
IEEE Transactions on Communications
IEEE Transactions on Communications
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
A simple solution for the carrier frequency offset estimation for tile-based OFDMA uplink
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
OFDMA based multiparty medium access control in wireless ad hoc networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Uplink synchronization in OFDMA spectrum-sharing systems
IEEE Transactions on Signal Processing
A novel OFDMA ranging method exploiting multiuser diversity
IEEE Transactions on Communications
A power efficient baseband engine for multiuser mobile MIMO-OFDMA communications
IEEE Transactions on Circuits and Systems Part I: Regular Papers
A low-complexity scheme for frequency estimation in uplink OFDMA systems
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Carrier frequency offset tracking in the IEEE 802.16e OFDMA uplink
IEEE Transactions on Wireless Communications
Data-aided CFO estimators based on the averaged cyclic autocorrelation
Signal Processing
Wireless Personal Communications: An International Journal
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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