| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve radar clutter suppressing performance for enabling sufficient suppressing of clutter even under a strong radar clutter environment. SOLUTION: A radar pulse of a predetermined frequency is emitted from a transmitter 101 at a predetermined repetition period. When an echo of this radar pulse is received by an antenna 103, it is inputted via several circuits into a narrow-band analog filter 109 of a frequency band narrower than a frequency band corresponding to the repetition period. By this, a target signal is extracted from the echo of the radar pulse and radar clutter is also suppressed. An output signal of the filter 109 is inputted via mixers 110 and 111, LPFs 114 and 115, and analog-to-digital converters 116 and 117 into a broad-band digital filter 118 with a signal processing band of a frequency band corresponding to the repetition period, and radar clutter is suppressed which could not be suppressed at the narrow-band analog filter 109.</p> |
