Abstract
Licensee MDPI, Basel, Switzerland. In this paper, a novel range compression algorithm for enhancing range resolutions of a passive Global Navigation Satellite System-based Synthetic Aperture Radar (GNSS-SAR) is proposed. In the proposed algorithm, within each azimuth bin, firstly range compression is carried out by correlating a reflected GNSS intermediate frequency (IF) signal with a synchronized direct GNSS base-band signal in the range domain. Thereafter, spectrum equalization is applied to the compressed results for suppressing side lobes to obtain a final range-compressed signal. Both theoretical analysis and simulation results have demonstrated that significant range resolution improvement in GNSS-SAR images can be achieved by the proposed range compression algorithm, compared to the conventional range compression algorithm.
| Original language | English |
|---|---|
| Article number | 1496 |
| Journal | Sensors (Switzerland) |
| Volume | 17 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2017 |
Keywords
- Global navigation satellite system
- GNSS-SAR
- Range compression
- Range resolution
- Synthetic aperture radar
ASJC Scopus subject areas
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics
- Biochemistry
- Instrumentation
- Electrical and Electronic Engineering