CPC G01S 7/354 (2013.01) [G01S 3/46 (2013.01); G01S 7/497 (2013.01); G01S 7/4914 (2013.01); G01S 13/931 (2013.01); G01S 13/933 (2020.01); G01S 13/95 (2013.01)] | 10 Claims |
1. An incoming wave count estimation apparatus comprising:
an array antenna including a plurality of element antennas and for receiving a signal radiated from a radio wave source to be targeted; and
processing circuitry performing a process of:
performing spatial averaging of correlation matrices by dividing a received signal of the array antenna to a plurality of subarrays having different shapes and calculating these correlation matrices for the respective subarrays having different shapes;
performing eigenvalue expansion of correlation matrices for the respective plurality of subarrays having different shapes after spatial averaging obtained; and
estimating an incoming wave count by integrating eigenvalues for the respective plurality of subarrays having different shapes obtained.
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