| 摘要 |
PURPOSE: To accurately estimate an incoming angle by outputting a select signal based on a substantially incoming bearing obtained by signal selecting from all receiving signals, and using only a wave receiver of the periphery of the incoming angle. CONSTITUTION: Receiving signal selecting means 6 calculates a correlation matrix at a step 401 by using a selected signal, and calculates the intrinsic value and eigen vector of the matrix R at a step 402. A bearing evaluating function F(θ) is calculated by using the eigen vector corresponding to the minimum intrinsic value at a step 403, and the angleθfor giving n pieces of largest peaks of the function F(θ) is set to an incoming angle estimated value by peak detecting means 404. If the substantially estimated direction of them is, for example, judged from the bearing of an antenna element #2, its peripheral element is selected at a step 405, sent to the means 6, which excludes except the peripheral element as the signal, and outputs it. Thereafter, the means 404 processes similar procedure, and outputs an azimuth angle indicating the peak nearest the element 442 of the angleθas incoming angle estimated valueθp. Thus, accurate incoming angle can be estimated by using only the wave receiver of the periphery of the incoming angle.
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