| 摘要 |
<p>PURPOSE:To enable clutter or jamming wave to be removed without removing target wave by adding a circuit for removing a number of continuous hits to a hit integrating circuit after the detection of constant false alarm rate (CFAR). CONSTITUTION:Being connected with a hit integrating integral circuit 4, a hit removing circuit 5 is provided. When a number of continuous hits are integrated among the output hits of the circuit 4, the hits are removed by the circuit 5. Since a target wave does not so widely spread in range direction and Doppler frequency direction, the number of the continuous hits is the degree of one or two and remains without being removed by the circuit 5. In contrast, in case of clutter or jamming wave, since those are normally present while spreading in the range direction and the Doppler frequency direction, the number of the continuous hits is increased to be removed by the circuit 5. Thus, the clutters or the jamming waves can be removed without removing the target wave.</p> |
