RADIO COMMUNICATION APPARATUS AND SUBCARRIER ASSIGNMENT METHOD

摘要

A radio communication apparatus wherein the amount of control information to be transmitted is reduced so as to improve the communication efficiency. In the apparatus, a line quality information extracting part (103) extracts CQI from received signals. An assignment control part (104) assigns, based on the CQI and request transmission rate information of the communication terminal apparatus of each user, a subcarrier to each communication terminal apparatus such that the request transmission rate of each communication terminal apparatus is satisfied, and further selects a modulation scheme. A request subcarrier number deciding part (105) decides, based on the request transmission rate information of the communication terminal apparatus of each user, the number of subcarriers to be assigned to the communication terminal apparatuses such that the request transmission rate of each communication terminal apparatus is satisfied. A request subcarrier number information generating part (107) generates information of the number of the subcarriers assigned to the communication terminal apparatuses. A subcarrier assigning part (110) assigns packet data to the selected subcarriers. Modulating parts (111-1 to 111-N) perform adaptive modulations of the packet data assigned to the subcarriers.