Paper Info
Title
Azimuth-variant signal processing in high-altitude platform passive SAR with spaceborne/airborne transmitter
Abstract
High-altitude platforms (HAP) or near-space vehicle offers several advantages over current low earth orbit (LEO) satellite and airplane, because HAP is not constrained by orbital mechanics and fuel consumption. These advantages provide potential for some specific remote sensing applications that require persistent monitoring or fast-revisiting frequency. This paper investigates the azimuth-variant signal processing in HAP-borne bistatic synthetic aperture radar (BiSAR) with spaceborne or airborne transmitter for high-resolution remote sensing. The system configuration, azimuth-variant Doppler characteristics and two-dimensional echo spectrum are analyzed. Conceptual system simulation results are also provided. Since the azimuth-variant BiSAR geometry brings a challenge for developing high precision data processing algorithms, we propose an image formation algorithm using equivalent velocity and nonlinear chirp scaling (NCS) to address the azimuth-variant signal processing problem. The proposed algorithm is verified by numerical simulation results.
Year
DOI
Venue
2013
10.3390/rs5031292
REMOTE SENSING
Keywords
Field
DocType
high-altitude platform,near-space vehicle,synthetic aperture radar (SAR),bistatic SAR,azimuth-variant,passive radar,near-space,chirp scaling,azimuth resolution
Signal processing,Transmitter,Data processing,Synthetic aperture radar,Remote sensing,Azimuth,Remote sensing application,Orbital mechanics,Geology,Passive radar
Journal
Volume
Issue
ISSN
5
3
2072-4292
Citations 
PageRank 
References 
1
0.38
27
Authors
2
Name
Order
Citations
PageRank
Wenqin Wang1473.19
Huai-Zong Shao25013.46