PHAASE NOISE COMPENSATION APPARATUS TO BE APPLIED OFDM SYSTEM AND METHOD THEREOF

摘要

An apparatus and a method for compensating a phase noise applied to an OFDM system are provided to detect a correct transmission signal by estimating a receiving signal and a convolution of an ICI(Inter Carrier Interference) as a phase noise and compensating the phase noise. An apparatus for compensating a phase noise applied to an OFDM system includes an ICI estimation unit(410), an estimation unit(420), a calculating unit(430), and an equalizer. The ICI estimation unit(410) estimates an ICI based on a pilot sub carrier included in a receiving signal. The estimation unit(420) estimates a CPE(Common Phase Error), which is a phase noise caused by the sampling of the receiving signal, based on the pilot sub carrier, and estimates a transmission signal by removing the estimated CPE in the receiving signal. The calculating unit(430) calculates a phase variable caused by the ICI in the receiving signal by performing a convolution for the ICI and the transmission signal. The equalizer compensates the phase variable caused by the calculated ICI in the receiving signal.