摘要 |
PCT No. PCT/SE80/00123 Sec. 371 Date Dec. 25, 1980 Sec. 102(e) Date Dec. 23, 1980 PCT Filed Apr. 23, 1980 PCT Pub. No. WO80/02327 PCT Pub. Date Oct. 30, 1980.An MTI-filter included in the receiver part of a tracking radar for suppressing clutter when receiving echo pulses from a certain target. The transmitting pulses of the tracking radar are transmitted in series where the carrier frequency is varied from pulse to pulse and is repeated from series to series. The MTI-filter (F) contains a number of delay links (DL1-DLN), for example digital shift registers which are stepped forward timely with the radar PRF. The input of the filter and the output of the shift register M</=N are connected to a differentiator (SK) where M=the number of carrier frequencies in a pulse series. |