Communications: directive radio wave systems and devices (e.g. – Base band system
Patent
1994-02-02
1995-01-10
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Base band system
G01S 728
Patent
active
053811518
ABSTRACT:
An ultra-wideband impulse radar system for use on an airborne platform includes circuitry for coherently integrating the signals to improve signal-to-noise ratio so as to enhance the detection capability of the system, and for motion compensation of the signals to correct for inadvertent modulations of received signals due to buffeting or vibration of the airborne platform which may otherwise corrupt the filtering and signal integration processes. The inclusion of velocity filters and coherent integration despite the lack of phase information in the signals is accomplished by exploiting the time-delay properties of the received impulse signals, in which the observable pulse repetition frequency of the received signals differs from the transmitted pulse repetition frequency by virtue of the relative velocity between signal reflecting elements and the radar platform.
REFERENCES:
patent: 4907001 (1990-04-01), Harmuth
patent: 5134408 (1992-07-01), Harmuth
patent: 5148174 (1992-09-01), Harmuth
Boles Sol
Buckland Dennis J.
Grumman Aerospace Corporation
Hellner Mark
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