Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Patent
1994-03-04
1996-01-02
Lobo, Ian J.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
342 39, 342128, 342132, 342135, 342109, 342162, 367905, G01S 1328
Patent
active
054812704
ABSTRACT:
A method and apparatus for identifying a remote target includes a transmitter for transmitting pulses of energy toward the target for generating echo signals, and a receiver for receiving the echo signals, and for generating received signals representing the target, noise and clutter. The received signals are applied through a plurality of cascaded channels, each including a Doppler filter cascaded with a multiplier, each also including range sidelobe suppression, for, in each of the cascaded channels, narrowband filtering the signals passing therethrough about a controllable center frequency, and for, if necessary, converting the signals passing therethrough to baseband, for thereby applying one of a plurality of Doppler filtered baseband signals to the input of each of the range sidelobe suppressors of each of the cascaded channels. The power of the Doppler filtered baseband signals in each range bin is evaluated for determining the frequency at which the spectral density is greatest. The center frequency of at least one of the cascaded Doppler channels is controlled such that one of the Doppler channels has its center frequency at the maximum-power frequency.
REFERENCES:
patent: 5070337 (1991-12-01), Chen et al.
patent: 5151702 (1992-09-01), Urkowitz
patent: 5173706 (1992-12-01), Urkowitz
patent: 5309161 (1994-05-01), Urkowitz et al.
patent: 5343208 (1994-08-01), Chesley
patent: 5376939 (1994-12-01), Urkowitz
Bucci Nicholas J.
Freedman Jerome E.
Urkowitz Harry
Lobo Ian J.
Martin Marietta Corporation
Meise W. H.
Nieves C. A.
Young S. A.
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