Communications: directive radio wave systems and devices (e.g. – Clutter elimination – Mti
Reexamination Certificate
2006-10-20
2008-11-11
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Clutter elimination
Mti
C342S196000
Reexamination Certificate
active
07450057
ABSTRACT:
A method for performing signal processing for accelerating moving targets, in one implementation, encompasses a method for performing coherent integration of pulses within a CPI for SMTI radar. In an embodiment, the method comprises the steps of determining the Fast Fourier Transform (FFT) for each pulse, and multiplying the FFT by a pulse compression reference function. The method then proceeds by shifting phase of the pulse-compressed FFT by applying a first factor derived from a ground reference point and a second factor derived from a velocity-acceleration hypothesis to provide phase-shifted data, shifting the envelope of the phase-shifted data by applying one factor derived from range history and a second factor derived from a velocity-acceleration hypothesis to provide aligned data, and determining the Inverse FFT for the aligned data to provide a set of target data of the form H(p,i1,i2,i3), where p is CPI number, i1is range index, i2is velocity index, and i3is coarse acceleration index, the latter three indices each referenced to the starting time of the first CPI. In a further embodiment, the invention encompasses first performing coherent integration for each CPI within a dwell of CPIs, then performing non-coherent integration in an efficient way, taking full advantage of the alignment to the starting time of the first CPI.
REFERENCES:
patent: 5235338 (1993-08-01), Hsiao et al.
patent: 5784026 (1998-07-01), Smith et al.
patent: 6538599 (2003-03-01), David
Fast pulse Doppler radar processing accounting for range bin migration T.L. Marzetta; E.A. Martinsen; C.P. Plum; Radar Conference, 1993., Record of the 1993 IEEE National pp. 264-268.
Bythrow Peter M
Northrop Grumman Space & Missions Systems Corp.
Patti, Hewitt & Arezina LLC
Tarcza Thomas H.
LandOfFree
Signal processing for accelerating moving targets does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal processing for accelerating moving targets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processing for accelerating moving targets will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4020084