Communications: directive radio wave systems and devices (e.g. – With particular circuit – For pulse modulation
Patent
1988-09-02
1990-01-02
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For pulse modulation
342175, G01S 730
Patent
active
048916498
ABSTRACT:
A pulsed radar system has improved signal to noise characteristics obtained by suppressing phase noise. Means are provided to store a copy of the transmitted RF signal pulse, which copy contains any phase noise of the RF carrier that is transmitted. The signal copy is retained and following a delay interval the signal is mixed in a high frequency electronic RF mixer with the received RF pulse signal, the latter of which represents a reduced level signal as reflected by an object back to the system receiver's antenna following the lapse of an interval of time. The RF mixer produces an intermediate frequency signal output in which the phase noise is suppressed thereby enhancing the receiver's signal to noise ratio. A novel pulsed signal delay circuit is employed in the foregoing which retains the copy by continuously recirculating a fraction of that RF input pulse over time until it is needed; as when the pulse is to be applied to the RF mixer. The delay circuit includes a fiber optic cable that functions as a delay line. In a related invention the pulsed signal delay circuit is used as an element of a RF receiver to stretch the width of incoming pulses in the time domain to permit a more narrowband signal filter thereby increasing the signal to noise ratio.
REFERENCES:
patent: 2147810 (1939-02-01), Alford
patent: 2520553 (1950-08-01), Lawson
patent: 2943318 (1960-06-01), Deloraine et al.
patent: 3255341 (1966-06-01), Wilcox
patent: 3680044 (1972-07-01), Herman et al.
patent: 4095224 (1978-06-01), Dounce et al.
patent: 4164741 (1979-08-01), Schmidt
patent: 4614946 (1986-09-01), Kaminetzky
patent: 4635060 (1987-01-01), Mertens
patent: 4682175 (1987-07-01), Lazarus
Labaar Frederik
Lance, deceased Algie L.
Goldman Ronald M.
Hellner Mark
Tarcza Thomas H.
Taylor Ronald L.
TRW Inc.
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