MULTI-CARRIER COMMUNICATION DEVICE AND FEEDBACK INFORMATION COMMUNICATION METHOD

摘要

There is provided a multi-carrier communication device capable of suppressing interference to other channels by feedback information and mitigating capacity decrease of the upstream line. In this device, a PL signal reception section (260) extracts a pilot signal in a PL signal extraction section (261) and measures the reception quality such as SIR in a reception quality measurement section (262). Here, the pilot signal is contained in each sub-carrier and accordingly, the reception quality measurement section (262) measures the reception quality of each sub-carrier. An FBSC decision section (270) decides a sub-carrier for feedback information according to the reception quality of each sub-carrier. More specifically, the FBSC decision section (270) decides the sub-carrier of the highest reception quality as a sub-carrier for the feedback information. The FBSC decision section (270) outputs the sub-carrier information for feedback information (FBSC) to a control CH transmission section (110) and an FB information reception section (250).