| 摘要 |
<p>PURPOSE:To enhance the signal detecting capacity in clutter, by storing the data of past clutter and subtracting said stored data from the data of the clutter obtained by lately scanning. CONSTITUTION:For example, memories 611-61n for storing the data of reflected wave obtained by the previous scanning are provided to the output terminals of detector circuits 331-33n. The data stored in these memories 611-61n are supplied to subtractors 621-62n along with the data of the reflected wave obtained by lately scanning outputted from the detector circuits 331-33n and subtracted from the reflected wave data obtained by lately scanning. The output signals of the subtractors 621-62n are respectively supplied to an output synthesizing part 35.</p> |
