Synthetic aperture hitchhiker imaging using non-cooperative sources of opportunity

Can Evren Yarman; Birsen Yazıcı; Margaret Cheney

doi:10.1117/12.719660

7 May 2007 Synthetic aperture hitchhiker imaging using non-cooperative sources of opportunity

Can Evren Yarman, Birsen Yazıcı, Margaret Cheney

Proceedings Volume 6568, Algorithms for Synthetic Aperture Radar Imagery XIV; 656806 (2007) https://doi.org/10.1117/12.719660
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

A hitchhiker is a passive radar receiver that relies on sources of opportunity to perform radar tasks.^1-4 In this paper, we consider a synthetic-aperture radar (SAR) system with static non-cooperative transmitters and mobile receivers traversing arbitrary trajectories and present an analytic image formation method. Due to its combined synthetic aperture and hitchhiking structure, we refer to the system under consideration as synthetic aperture hitchhiker (SAH). Our approach is applicable to cooperative and/or non-cooperative and static and/or mobile sources of opportunity. Conventional SAR processing involves correlation of the received signal from a receiver with the transmitted waveform as a first step of the image formation. For passive SAR, however, the transmitted waveform is not necessarily known. Instead, we use spatio-temporal correlation of received signals. Given a pair of receivers, the spatio-temporal correlation method compares the received signals to identify a target within the illuminated scene. We combine this with microlocal techniques to develop a filtered backprojection (FBP) type inversion method for passive SAR⁵. Combined correlation-FBP inversion method does not require the knowledge of the transmitter locations. Furthermore, FBP inversion has the advantage of computational efficiency and image formation under non-ideal conditions, such as arbitrary flight trajectories and non-flat topography.

Citation Download Citation

Can Evren Yarman, Birsen Yazıcı, and Margaret Cheney "Synthetic aperture hitchhiker imaging using non-cooperative sources of opportunity", Proc. SPIE 6568, Algorithms for Synthetic Aperture Radar Imagery XIV, 656806 (7 May 2007); https://doi.org/10.1117/12.719660

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available