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Signal and Noise Considerations in Multi-Channel SAR

Younis, Marwan and Lopez-Dekker, Paco and Krieger, Gerhard (2015) Signal and Noise Considerations in Multi-Channel SAR. In: International Radar Symposium (ISSN: 0885-8985). German Institute of Navigation (DGON). International Radar Symposium (IRS), 2015-06-24 - 2015-06-26, Dresden, Germany. doi: 10.1109/IRS.2015.7226367. ISSN 0885-8985.

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Official URL: http://www.dgon-irs.org/


One of the most ubiquitous, yet treacherous relations in radar is the equation describing the ratio of signal-to-noise powers, known as the radar equation. It is straight forward to derivation the radar equation for a point scatterer, as commonly done on an undergraduate courses level when radar is introduced. Typically, the point scatterer based approach is extended to derive the radar equation for distributed scatterers as applicable for imaging synthetic aperture radar. There are, however, several hidden pitfalls in the radar equation when applied to imaging radars. The most common one, is, that it appears to include a gain, i.e.\ an increase in the signal-to-noise ratio, associated to image focusing (also know as range and azimuth compression). A conclusion which is incorrect and misleading. As it turns out, understanding the radar equation requires a profound SAR and signal processing understanding. This paper attempts a rigorous approach interpreting the signal and noise power of a multi-channel digital beam-forming SAR system.

Item URL in elib:https://elib.dlr.de/95327/
Document Type:Conference or Workshop Item (Speech)
Title:Signal and Noise Considerations in Multi-Channel SAR
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:June 2015
Journal or Publication Title:International Radar Symposium (ISSN: 0885-8985)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:German Institute of Navigation (DGON)
Keywords:SNR, SAR, Multi-Channel, Digital Beamforming
Event Title:International Radar Symposium (IRS)
Event Location:Dresden, Germany
Event Type:international Conference
Event Start Date:24 June 2015
Event End Date:26 June 2015
Organizer:German Institute of Navigation (DGON)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Development of a mini-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Younis, Dr.-Ing. Marwan
Deposited On:20 Feb 2015 10:43
Last Modified:24 Apr 2024 20:01

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