Name
Abstract | ||
|---|---|---|
We report on experimental results, and associated theory, for a 60 GHz synthetic aperture radar (SAR) testbed for short-range (sub-meter) imaging. Our testbed consists of a monostatic radar with synchronized transmitter and receiver, with lateral motion (over 10-30 cm) providing the SAR geometry, and range resolution provided by stepped frequency continuous wave (SFCW) signals covering a band exceeding 6 GHz. Sub-centimeter (cm) level resolution is achieved in both cross-range and slant-range. For stationary targets, platform movement provides a means of emulating a system with multiple monostatic transceivers, and exploring the impact of the spatial distribution of such transceivers. In particular, sparse spatial sampling causes significant deterioration in cross-range resolution under classical SAR image reconstruction, which is based on a point scatterer signal model. We show that performance can be greatly improved by modeling objects using “patches,” where a patch is defined as a continuum of point scatterers with (approximately) the same reflectivity. Estimation-theoretic quantities such as the Cramer-Rao Lower Bound (CRLB) and normalized cross-correlation between responses for nearby targets, are derived for both point-and patch-based signal models. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/ACSSC.2014.7094506 | Pacific Grove, CA |
Keywords | Field | DocType |
millimetre wave radar,radar imaging,radar receivers,radar resolution,radar transmitters,signal reconstruction,synthetic aperture radar,CRLB,Cramer-Rao lower bound,SAR geometry,SAR testbed,SFCW signals,classical SAR image reconstruction,cross-range resolution,estimation-theoretic quantities,frequency 60 GHz,lateral motion,monostatic radar,monostatic transceivers,normalized cross-correlation,patch-based signal models,patches,platform movement,point scatterer signal model,point scatterers,point-based signal models,receiver,short-range imaging,sparse spatial sampling,spatial distribution,stepped frequency continuous wave signals,sub-centimeter level resolution,synchronized transmitter,synthetic aperture radar testbed | Radar engineering details,Continuous-wave radar,Radar,Radar imaging,Computer science,Side looking airborne radar,Synthetic aperture radar,Electronic engineering,Inverse synthetic aperture radar,Bistatic radar | Conference |
ISSN | Citations | PageRank |
1058-6393 | 1 | 0.35 |
References | Authors | |
4 | 4 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Babak Mamandipoor | 1 | 37 | 4.56 |
| Malysa, G. | 2 | 1 | 0.35 |
| amin arbabian | 3 | 227 | 35.52 |
| Upamanyu Madhow | 4 | 3025 | 293.76 |