| 摘要 |
A base station apparatus which transmits packets always using a modulation and coding scheme suitable for channel quality, and increases the throughput in the radio communication system. In the apparatus, radio reception section 104 receives a radio transmission signal including channel quality information transmitted from a communication terminal apparatus via reception antenna 102 , and performs predetermined radio reception processing. Demodulation section 106 demodulates the radio transmission signal subjected to the radio reception processing, and extracts the channel quality information. A setting unit is comprised of channel quality information storage section 108 , judgment section 110 and MCS determination section 112 , and sets a modulation and coding scheme based on a plurality of received pieces of channel quality information. Adaptive modulation section 114 performs predetermined adaptive modulation processing on transmission data to transmit to the communication terminal apparatus, using the set modulation and coding scheme.
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