Through-the-wall frequency stepped imaging system utilizing...

Details Through-the-wall frequency stepped imaging system utilizing... Through-the-wall frequency stepped imaging system utilizing...

2007-12-11

2007-12-11

Tarcza, Thomas H. (Department: 3662)

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

Transmission through media other than air or free space

C342S160000, C342S453000

Reexamination Certificate

active

11156948

ABSTRACT:
Lower resolution and clutter-prone two-tone CW radars can have the displayed images dramatically improved by three techniques involved in the subject invention. The three techniques involved are the stepping of each of the multiple radars for readings at multiple frequencies, weighting the results to compensate for wall-induced distortions and differential image processing. In one embodiment, weights for each frequency counteract the distortion produced by particular wall. For differential image processing, temporal snapshots of the images are subtracted one from the other such that the result is only due to moving objects, thus to provide a dramatic display of the presence and position of moving individuals behind a wall.

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