| 摘要 |
PURPOSE:To improve the performance of signal detection without deteriorating the ability of eliminating ground clutter, by supplying an output signal of an MTI (moving target indicator) circuit to a plurality of filters whose central frequency is variable, and by shifting the central frequency of the filters in accordance with a mean frequency of an unrequired signal. CONSTITUTION:An output signal of an MTI circuit 21 is supplied to a plurality of filters 211-22n whose central frequency can be set arbitrarily. The central frequency of these filters 211-22n is shifted in accordance with a mean frequency of an unrequired signal, and thus the number of filters whose output is turned ineffective is reduced to the minimum. |
