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In this paper, the authors develop a blind Carrier Frequency Offsets (CFOs) estimation algorithm for multiusers in the uplink of an Orthogonal Frequency-Division Multiple-Access (OFDMA) system, where the base station equipped with Uniform Linear Array (ULA). Due to the ULA at base station, different users could be separated by their spatial information. So, unlike existing blind alternatives, which are subject to some specific carrier assignment schemes or rely on null carriers, their proposed method can support Generalized Carrier Assignment Scheme (GCAS) and full loaded systems.
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