| 摘要 |
PROBLEM TO BE SOLVED: To perform estimation of 360°direction by using a linear array antenna in one-dimensional arrangement. SOLUTION: When the direction of arrival is estimated in a linear array antenna arranged to introduce at least one directivity antenna element, a first direction estimating means performs first direction estimation by using the reception signal of the directivity antenna element, and a second direction estimating means performs second direction estimation by using the reception signals of all linear array antennas. Furthermore, final direction estimation is selected from two direction estimation results obtained in second direction estimation based on the first direction estimation so that estimation of 360°direction can be carried out without two-dimensionally arranging sub-arrays. COPYRIGHT: (C)2007,JPO&INPIT
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