| 摘要 |
Spreading factor determining section 104 increases spreading factor M of a spreading code to be generated in first spreading code generating section 102, as the ICI level increases. In other words, as deterioration increases in orthogonality among subcarriers in the frequency domain, the section 102 increases spreading factor M in the frequency domain. Further, as the ISI level increases, the section 102 increases spreading factor L of a spreading code to be generated in second spreading code generating section 103. In other words, as deterioration increases in orthogonality among subcarriers in the time domain, the section 102 increases spreading factor L in the time domain.
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