| 摘要 |
PROBLEM TO BE SOLVED: To provide a pilot signal transmission method for facilitating estimating the influence of interference waves generated between radio waves or between OFDM signals, in a digital radio transmission system using a plurality of radio waves or OFDM signals having the same frequency. SOLUTION: When some radio wave or OFDM signal transmits a pilot signal for estimating a transmission path, pilot signals of the other radio waves or OFDM signals are made non-signal (not transmitted). By doing this, the influence of interference waves can efficiently be estimated. COPYRIGHT: (C)2004,JPO
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