| 摘要 |
<p>PURPOSE:To output only a matched filter output which is most matched with the Doppler frequency of an input signal to optimize the spread and the shift of a main lobe and the no-increase of a side lobe by adding a in-moving window maximum amplitude detecting device. CONSTITUTION:A matched filter 1a executes a filter operation which is most matched with an input 8, and outputs a pulse-compressed signal 5a. The matched filter 1b executes a filter operation whose Doppler frequency is shifted by f2-f1, and outputs a pulse-compressed signal 5b having a large side lobe. The matched filter 1c executes a filter operation whose Doppler frequency is shifted large as f3-f1, and outputs pulse-compressed signal 5c. The outputs 5a-5c are sent out to amplitude detectors 3a-3c and a selector 2. In-moving window maximum amplitude detectors 10a-10c detect the maximum amplitudes 11a-11c in the moving window of amplitude detecting signals 6a-6c, respectively, and a maximum value detector 4 detects the maximum value among three pieces, and outputs a control signal 7 to the selector 7. The selector 2 selects the outputs the output having the maximum amplitude in the moving window among the matched filter outputs.</p> |
