| 摘要 |
<p>A base station device of a radio communication system in which a control data transmission channel and a user data transmission channel are assigned to different frequency bands, wherein the base station device comprises a first frequency deviation estimation means to estimate frequency deviation using first demodulation reference signals contained in the received control data transmission channel at predetermined time intervals; a second frequency deviation estimation means to estimate frequency deviation using second demodulation reference signals contained in the received user data transmission channel at time intervals longer than those for the first demodulation reference signals; a third frequency estimation means to estimate frequency deviation using transmission quality monitoring reference signals contained in the received user data transmission channel at time intervals longer that those for the first and second demodulation reference signals; and a frequency deviation determination means to calculate a frequency deviation estimation result by comparing a frequency deviation estimation value using the first demodulation reference signal with a first threshold value and a second threshold value which is smaller than the first threshold value.</p> |
