Intra-pulse MTI system with range ambiguity suppression

Details Intra-pulse MTI system with range ambiguity suppression Intra-pulse MTI system with range ambiguity suppression

1973-10-12

1978-06-20

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 172PC, G01S 942, G01S 9233

Patent

active

040964787

ABSTRACT:
A dual-pulse coherent MTI system having a time interval between pulses as short as zero. The pulses are "chirped" in opposite sense, the latter constituting a unique coding for eliminating range ambiguity problems. Video return signals are received and applied to two parallel channels each containing pulse compression and limiting circuits. The pulse compression circuits are matched uniquely to the positive chirp slope pulse in one channel and to the negative chirp slope pulse in the other channel. The channel corresponding to the earlier of the two pulses is subjected to a fixed delay of one pulse width before the outputs of the channels are differenced to produce a net MTI signal. This is a continuation of application Ser. No. 159,751, filed July 6, 1971, now abandoned.

REFERENCES:
patent: 3225349 (1965-12-01), Thor
patent: 3905033 (1975-09-01), Moore et al.
patent: 3968490 (1976-07-01), Gostin
patent: 4053884 (1977-10-01), Cantrell et al.

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