Phase Noise Compensation for OFDM Systems

摘要

We describe a low complexity method for time domain compensation of phasenoise in OFDM systems. We extend existing methods in several respects. First wesuggest using the Karhunen-Lo\'{e}ve representation of the phase noise processto estimate the phase noise. We then derive an improved datadirected choice ofbasis elements for LS phase noise estimation and present its total least squarecounterpart problem. The proposed method helps overcome one of the majorweaknesses of OFDM systems. We also generalize the time domain phase noisecompensation to the multiuser MIMO context. Finally we present simulationresults using both simulated and measured phased noise. We quantify thetracking performance in the presence of residual carrier offset.