Douglas A. Gray

2 accepted papers

2015

3D SAR beamforming under a foliage canopy from a single pass

Paul B. Pincus, Mark Preiss, Douglas A. Gray

ICASSP 2015accepted

Coherent detection of changes on the ground under a forest canopy by repeat-pass synthetic aperture radar (SAR) imaging is problematic due to the mixture of ground and canopy responses. 3D SAR imaging, by beamforming data from multiple low-frequency across-track acquisitions, offers a way to separat…

Cited by 0 Source ↗Scholar ↗

2015

Weak interference direction of arrival estimation in the GPS L1 frequency band

Zili Xu, Matthew Trinkle, Douglas A. Gray

ICASSP 2015accepted

Due to its low received power, a GPS signal is vulnerable to both intentional and unintentional interferences. In this paper, the problem of estimating the direction of arrival of a weak GPS interference, which has the same power level as the GPS signals or is even weaker than them, using a GPS ante…

Cited by 0 Source ↗Scholar ↗