Super-resolution based on frequency domain interferometric...

Details Super-resolution based on frequency domain interferometric... Super-resolution based on frequency domain interferometric...

2007-07-10

2007-07-10

Pihulic, Dan (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

C342S02500R, C342S189000, C342S195000

Reexamination Certificate

active

11130746

ABSTRACT:
A system for obtaining frequency domain interferometric super-resolution of a target scatterer, having a first and a second coherent transceivers, a mutual coherent sub-system and an estimation system. The first and second coherent transceivers are operative to produce a plurality of first and second sampling signals separated from each other by a predetermined frequency difference within the first and second sub-band, respectively. The mutual coherent sub-system is coupled to the first and second coherent transceivers to receive phase and amplitude of the first and second sampling signals, so as to evaluate an ambiguous range estimate from a pair of the first and second sampling signals and an unambiguous range estimate from a pair of the first and/or second sampling signals. The estimation system follows the mutual coherent sub-system to reconcile the ambiguous and unambiguous range estimates so as to obtain a target signature with a super-resolution defined by a frequency offset between the first and second sub-bands.

REFERENCES:
patent: 5945940 (1999-08-01), Cuomo
patent: 2006/0077091 (2006-04-01), Wu et al.

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