Patent ID: 7907509
Filing Date: 2011-03-15
Classification: H04B,H04L

Abstract:
1. A communication apparatus performing communication using a multi-carrier signal, the communication apparatus comprising: a communication quality calculator that calculates communication quality corresponding to at least two sub-carriers respectively, out of a plurality of sub-carriers included in the multi-carrier signal; a sub-carrier detector that compares each of the communication quality calculated by the communication quality calculator with a first threshold, and that detects a plurality of sub-carriers corresponding to lower communication quality than the first threshold, based on the comparison result; a sub-carrier extractor that extracts at least two sub-carriers from the plurality of sub-carriers detected by the sub-carrier detector, so that the communication quality exceeds the first threshold; and a multi-carrier signal transmitter that assigns same data to the sub-carriers extracted by the sub-carrier extractor, and that transmits the extracted sub-carriers as the multi-carrier signal, wherein: the sub-carrier detector further compares the communication quality calculated by the communication quality calculator with a second threshold lower than the first threshold, and detects a sub-carrier corresponding to lower communication quality than the second threshold, based on the comparison result, and the sub-carrier extractor extracts the at least two sub-carriers from the plurality of sub-carriers detected by the sub-carrier detector, the plurality of sub-carriers not including the sub-carrier corresponding to lower communication quality than the second threshold, so that the communication quality of the extracted two sub-carriers exceeds the first threshold.