Distributed aperture imaging with multiple transmitters in complex environments

T. Varslot; B. Yazici; M. Cheney

doi:10.1117/12.777504

15 April 2008 Distributed aperture imaging with multiple transmitters in complex environments

T. Varslot, B. Yazici, M. Cheney

Proceedings Volume 6970, Algorithms for Synthetic Aperture Radar Imagery XV; 69700J (2008) https://doi.org/10.1117/12.777504
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

We present a new image reconstruction method for distributed apertures operating in complex environments with additive non-stationary noise. Our method is capable of exploiting information that we might have about: multipath scattering in the environment; statistics of the objects to be imaged; statistics of the additive non-stationary noise. The aperture elements are distributed spatially in an arbitrary fashion, and can be several hundred wavelengths apart. Furthermore, our method facilitates multiple transmit apertures which operate simultaneously, and is thus capable of handling a true multi-transmit-multi-receive scenario. We derive a set of basis functions which is adapted to the given operating environment and sensor distribution. By selecting an appropriate subset of these basis functions we obtain a sub-space reconstruction which is optimal in the sense of obtaining the minimum-mean-square-error for the reconstructed image. Furthermore, as this subspace determines which details will be visible in the reconstructed image, it provides a tool for evaluating the sensor locations against the objects that we would like to see in the image. The implementation of our reconstruction takes the form of a filter bank which is applied to the pulse-echo measurements. This processing can be performed independently on the measurements obtained from each receiving element. Our approach is therefore well suited for parallel implementation, and can be performed in a distributed manner in order to reduce the required communication bandwidth between each receiver and the location where the results are merged into the final image. We present numerical simulations which illustrate capabilities of our method.

Citation Download Citation

T. Varslot, B. Yazici, and M. Cheney "Distributed aperture imaging with multiple transmitters in complex environments", Proc. SPIE 6970, Algorithms for Synthetic Aperture Radar Imagery XV, 69700J (15 April 2008); https://doi.org/10.1117/12.777504

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Scattering

Reflectivity

Signal to noise ratio

Transmitters

Chemical elements

Receivers

Mirrors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years