| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a DBF radar device that can perform accurate clutter elimination processing for a detection video signal even when an observation direction is switched. SOLUTION: A clutter map storage circuit 70 stores the level data of an unnecessary constituent such as clutter being observed for each range cell in each observation direction in advance by the control of a clutter map generation control circuit 60. A CFAR(constant false alarm rate) circuit 80 obtains the average level of the unnecessary constituent being contained in a detection video signal being inputted from a DBF(digital beam forming) circuit 40 based on N detection video signals, and deletes the average level from the detection video signal that is to be observed. When the N detection video signals include a signal before/after switching the observation direction, a signal that is observed in a direction that is different from that of the detection video signal to be observed among the N detection video signals is substituted with data that are stored in the clutter map storage circuit 70 for obtaining the average level of the unnecessary constituent.</p> |
