RADIO COMMUNICATION APPARATUS AND TRANSFER RATE DECISION METHOD

摘要

A transfer rate decision method capable of optimizing transfer rate (modulation method and coding rate) allocation with a high accuracy in the AMC method. In this method, a base station detects a Doppler frequency (moving speed) of each mobile station by using a Doppler frequency detector (117). According to the Doppler frequency (moving speed) obtained by the Doppler frequency detector (117), an MCS allocation unit (125) corrects a relationship expression between the MCS (coding rate and modulation method) and a CIR. For example, a threshold value of the CIR is corrected and an optimal MCS for the CIR report value is decided. The allocation result (coding rate and modulation method) of the MCS allocation unit (125) is output to a coding unit (101) and a modulation unit (103).