Communications: directive radio wave systems and devices (e.g. – Determining distance – With remote cooperating station
Reexamination Certificate
2006-12-12
2006-12-12
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With remote cooperating station
C342S126000, C342S131000, C342S132000, C342S134000, C342S135000, C342S148000
Reexamination Certificate
active
07148839
ABSTRACT:
A bistatic radar has a radar transmitter at a first location on a moving platform having a motion and a radar receiver at a second location, remote from the first location. The transmitter illuminates a target along an indirect path with an encoded radar signal. The target reflects the encoded radar signal to the radar receiver. The transmitter concurrently provides the encoded radar signal to the radar receiver along a direct path. The encoded radar signal is radiated at a start time from a central reference point, and contains the first location, the pulse start time, the central reference point and the motion of the moving platform. Bit synchronization codes are also included.The radar receiver receives the encoded radar signal from the radar transmitter along the direct path during a first time interval, and the same encoded radar signal reflected from the target along the indirect path during a second time interval.The radar receiver decodes first information contained in the encoded radar signal from the direct path received during the first time interval to extract direct path information. The radar receiver also decodes second information contained in the encoded radar signal from the indirect path received during the second time interval to extract indirect path information. The radar receiver combines the direct path information and the indirect path information to to generate a target image or perform target detection. Linear Frequency Modulated (LFM) pulse coherency is maintained by extracting from the direct path pulse phase corrections and applying the phase correction to the indirect received LFM pulses.
REFERENCES:
patent: 4370656 (1983-01-01), Frazier et al.
patent: 4595925 (1986-06-01), Hansen
patent: 5608407 (1997-03-01), Jain et al.
patent: 6297765 (2001-10-01), Frazier et al.
patent: 6614386 (2003-09-01), Moore et al.
patent: 7053821 (2006-05-01), Budic
patent: 2002/0130807 (2002-09-01), Hall et al.
patent: 2005/0083199 (2005-04-01), Hall et al.
patent: 2005/0285787 (2005-12-01), Delaveau et al.
patent: 2006/0033656 (2006-02-01), Budic
patent: 2006/0197701 (2006-09-01), Heide et al.
patent: 2006/0202885 (2006-09-01), Chen
patent: 2251351 (1992-07-01), None
“An ocean-altimetry measurement using reflected GPS signals observed from a low-altitude aircraft”, Lowe, S.T.; Zuffada, C.; LaBrecque, J.L.; Lough, M.; Lerma, J.; Young, L.E. Proceedings. IGARSS 2000. vol. 5, 2000 Ps:2185-2187.
“Correlation time analysis of delay-Doppler waveforms generated from ocean-scattered GPS signals”, You, H.; Garrison, J.L.; Heckler, G.; Smajlovic, D. IGARSS '04. vol. 1, Sep. 20-24, 2004 Ps: 428-431.
Alkov Leonard A.
Raytheon Company
Sotomayor John B.
Vick Karl A.
LandOfFree
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