Communications: directive radio wave systems and devices (e.g. – Clutter elimination – Mti
Reexamination Certificate
2006-06-20
2006-06-20
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Clutter elimination
Mti
C342S089000, C342S094000, C342S118000, C342S134000, C342S137000, C342S159000, C342S162000, C342S175000, C342S195000
Reexamination Certificate
active
07064704
ABSTRACT:
A radar transmits electromagnetic energy in pulse repetition intervals and receives reflections from objects in range gates including Doppler filters. The radar approves desirable ambiguous echoes and suppresses ambiguous echoes of no interest or that interfere with the radar's display. The radar frequency varies according to a staggered or wobbling pattern. The ambiguous echoes produce one pulse in the range gates within a predetermined number of periods. The Doppler filter works with an impulse function response that includes a small number of samples. The Doppler filter, during the predetermined number of periods, gives rise to independent samples from reflectors within the radar's unambiguous range. When the independent samples exceed the small number of samples, the radar approves the ambiguous echo. Otherwise, it is suppressed. In this way, ambiguous echoes are prevented from interfering with the reception or display of echoes. The suppression of asynchronous interferences can be made easier.
REFERENCES:
patent: 3491360 (1970-01-01), Stoorvogel
patent: 4049953 (1977-09-01), Evans, Jr.
patent: 4057800 (1977-11-01), Ganz
patent: 4106019 (1978-08-01), Alexander et al.
patent: 4679050 (1987-07-01), Bergman
patent: 4714927 (1987-12-01), Siegel et al.
patent: 4730189 (1988-03-01), Siegel et al.
patent: 4973968 (1990-11-01), Hurd
patent: 6081221 (2000-06-01), Zrnic et al.
patent: 6720909 (2004-04-01), Dedden
patent: 2335103 (1999-09-01), None
patent: 64-50978 (1989-02-01), None
patent: WO 9947944 (1999-09-01), None
Franklin Eric J.
Gregory Bernarr E.
SAAB AB
Venable LLP
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