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This paper presents a novel algorithm for residual phase estimation inwireless OFDM systems, including the carrier frequency offset (CFO) and thesampling frequency offset (SFO). The subcarriers are partitioned into severalregions which exhibit pairwise correlations. The phase increment betweensuccessive OFDM blocks is exploited which can be estimated by two estimatorswith different computational loads. Numerical results of estimation varianceare presented. Simulations indicate performance improvement of the proposedtechnique over several conventional schemes in a multipath channel.

Fine Residual Carrier Frequency and Sampling Frequency Estimation in Wireless OFDM Systems