Microwave Mobile Communications
Microwave Mobile Communications
Training symbol based coarse timing synchronization in OFDM systems
IEEE Transactions on Wireless Communications
A practical scheme for frequency offset estimation in MIMO-OFDM systems
EURASIP Journal on Wireless Communications and Networking - Special issue on synchronization in wireless communications
A universal frequency offset estimator for OFDM applications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A comparison of pilot-aided channel estimation methods for OFDMsystems
IEEE Transactions on Signal Processing
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In orthogonal frequency-division multiplexing (OFDM) systems, the integer part of carrier frequency offset (CFO) as a multiple of subcarrier spacing needs to be estimated from the frequency-domain signal. The performance of the autocorrelation based method is quite poor, while the channel knowledge based method is too complex for hardware real-time implementation. To provide improved tradeoffs between the performance and complexity, we propose a new hybrid algorithm that filters away unlikely integer CFO candidates with the autocorrelation method and determines the most likely estimate with channel knowledge. The analytical performance of the proposed hybrid method agrees with the simulation results and both demonstrate the cost-effectiveness of the method even in challenging wireless channel conditions.