Communications: directive radio wave systems and devices (e.g. – With particular circuit – With polarization
Reexamination Certificate
2007-12-04
2007-12-04
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
With polarization
C342S022000, C342S027000, C342S160000
Reexamination Certificate
active
11356997
ABSTRACT:
A linear FM pulse radar with Doppler processing of co-polarized and cross-polarized radar return signals isolates the target echo signal content associated with a moving pedestrian to provide high quality target echo data for standoff HCE detection based on polarimetric signature analysis. Baseband co-polarized and cross-polarized radar return signals are repeatedly and coherently integrated across numerous successive radar return pulses to create co-polarized and cross-polarized range vs. velocity (Doppler) data maps. The co-polarized data map is used to identify a moving pedestrian, and co-polarized and cross-polarized data subsets corresponding to the identified pedestrian are extracted and subjected to polarization signature analysis to determine if the pedestrian is bearing explosive devices. Low pass filtering of the of the baseband co-polarized and cross-polarized radar return signals prior to integration provides range aliasing to reject signal content associated with objects beyond the unambiguous range of the radar apparatus.
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Gorman John D.
Reed John C.
Chen Shelley
Navarre Mark A.
Science, Engineering and Technology Associates Corporation
Tarcza Thomas H.
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