| 摘要 |
PROBLEM TO BE SOLVED: To decrease the estimated error of an angle spread without adding a large instrument in an arrival wave spreading measuring instrument for measuring a spatial arrival angle distribution of arrival radio waves. SOLUTION: A receiving level of radio waves received with each antenna of an antenna device 1 comprising a plurality of antennas arranged at regular intervals is measured with a receiving level measuring instrument 2. The receiving level of each antenna is recorded in a receiving level memory part 3a for fixed hours, and a correlation curve representing the relation of a coefficient of correlation between receiving levels and the distance between antennas is found with a correlation curve operation part 3b. A plurality of angle profile functions are prepared, and the correlation curves corresponding to the angle profile functions are previously memorized in an angle profile pattern memory part 3c. Among a plurality of correlation curves memorized in the angle profile pattern memory part 3c, the nearest curve to the correlation curve found with the correlation curve operation part 3b is selected with a fitting operation part 3d.
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