Patent ID: 8457252

Claim:
A digital signal receiver comprising: a Common Phase Error (CPE) removal unit ( 240 ) configured to reduce common phase error of the received signal by using pilot sub-carriers that are corrected from local pilot sub-carriers with channel state information (CSI); and a channel estimation (CE) unit ( 250 ) configured to estimate the channel state information (CSI) of the received signal after reducing common phase error (CPE) and feed the CSI back to the CPE removal unit ( 240 ); wherein, the CPE removal unit ( 240 ) comprises a means ( 241 ) for generating the CSI corrected pilot sub-carriers by multiplying the CSI received from the CE unit ( 250 ) with 1 or −1 according to positive or negative sign of the local pilot sub-carriers only in response to continual pilots of the received signal.