Phase noise mitigation in OFDMA uplink
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This paper addresses the problem of the phase noise induced spectral spread in an OFDMA uplink scenario. Accompanied with power differences between the users at the receiver in a multiuser case, the phase noise induced spread causes performance degradation for users with low signal powers. This paper proposes a receiver-side digital signal processing methods to estimate and mitigate the spread caused by the transmitter-side phase noise. The introduced methods show a significant gain when compared with other conventional phase noise estimation and mitigation methods that are not designed especially for the multiuser scenario.
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