| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that a conventional guidance apparatus transmits radio waves of a vertically polarized wave and a horizontally polarized wave to a target, receives signals reflected from the target and performs polarization signal processing of the received signals to detect a target signal having a different polarization characteristic from a clutter signal and track the detected target signal, but when sea waves include a plurality of periodicities, the polarization characteristics of clutter are made ambiguous; a clutter suppression effect by the polarization signal processing cannot be obtained; and the target signal cannot be detected. <P>SOLUTION: A guidance apparatus includes a polarization sharing antenna for simultaneously receiving a horizontally polarized wave and a vertically polarized wave and polarization detection processing, and when detecting a target signal from a clutter signal by the polarization signal processing, previously resolves frequency components of clutter by Doppler signal processing to reduce ambiguity in the polarization characteristics of the clutter. Consequently, target detection performance in the polarization signal processing can be improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
