| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio transmitter and a radio transmission method by which the deterioration of propagation path estimation accuracy is suppressed without giving interference to a different communication systems sharing a frequency band. SOLUTION: When a channel estimating part 203 estimates a propagation path characteristic from an IMT-Advanced base station to an FSS earth station for the first time, a subcarrier mapping part 107 maps a pilot symbol into a subcarrier other than an FSS using band, and also maps the pilot symbol to a subcarrier adjacent to an FSS using band other than the FSS using band. COPYRIGHT: (C)2011,JPO&INPIT
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