Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing
US9791563B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2015 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Feb 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The various embodiments presented herein relate to utilizing an operational single-channel radar to collect and process synthetic aperture radar (SAR) and ground moving target indicator (GMTI) imagery from a same set of radar returns. In an embodiment, data is collected by randomly staggering a slow-time pulse repetition interval (PRI) over a SAR aperture such that a number of transmitted pulses in the SAR aperture is preserved with respect to standard SAR, but many of the pulses are spaced very closely enabling movers (e.g., targets) to be resolved, wherein a relative velocity of the movers places them outside of the SAR ground patch. The various embodiments of image reconstruction can be based on compressed sensing inversion from undersampled data, which can be solved efficiently using such techniques as Bregman iteration. The various embodiments enable high-quality SAR reconstruction, and high-quality GMTI reconstruction from the same set of radar returns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.