Patent ID: 7885343

Claim:
A device for clipping multicarrier signal, comprising: a subcarrier power detection unit configured to detect power of each subcarrier forming a multicarrier joint signal and output a detection result; a subcarrier Idle Period in DownLink (IPDL) detection unit configured to perform an IPDL detection for each subcarrier and output an IPDL flag when an IPDL starts in a subcarrier; a clipping filter coefficient selection unit configured to select a clipping filter coefficient according to the IPDL flag from the subcarrier IPDL detection unit and the detection result from the subcarrier power detection unit and output the clipping filter coefficient; a multicarrier clipping processing unit configured to perform a clipping processing of the received multicarrier joint signal according to the clipping filter coefficient from the clipping filter coefficient selection unit and output the multicarrier joint signal after the clipping processing; and an IPDL delay compensation unit configured to perform a delay compensation for the IPDL flag outputted by the subcarrier IPDL detection unit and output the IPDL flag after the delay compensation to the clipping filter coefficient selection unit, wherein the clipping filter coefficient selection unit selects the clipping filter coefficient according to the IPDL flag after the delay compensation and the detection result from the subcarrier power detection unit; and wherein amount of the delay compensation in the IPDL delay compensation unit equals to amount of a channel delay of the subcarrier baseband data minus both amounts of a delay produced by performing the IPDL detection for the subcarrier and of a delay produced by performing the selection of the clipping filter coefficient.