Communications: directive radio wave systems and devices (e.g. – With particular circuit – Digital processing
Patent
1985-11-25
1987-07-07
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Digital processing
364726, 342137, G01J 1300
Patent
active
046790500
ABSTRACT:
Described is a pulse radar apparatus having a repetition period containing m wobbles. The pulse radar apparatus is provided with: a transmitting and receiving unit (2), whereby the received target echoes are sampled and digitized; an n-point DFT processing unit (3); a threshold circuit (4); and a cluster combiner circuit (5) comprising means to form a cluster covering one single target using the signals obtained from the threshold circuit (4). Due to the wobbles, additional information arises in the DFT spectra. From the range, azimuth, local maximum values of the DFT spectrum and the associated output channel number of the DFT processing unit (3), a classification unit (6) determines whether a target is a multiple-time-around target. The classification unit (6) is also able to determine the target doppler frequency, even if this frequency exceeds the average pulse repetition frequency.
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Hayes, Jr. Donald E.
Hollandse Signaalapparaten B.V.
Kraus Robert J.
Tarcza Thomas H.
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