Impact of oscillator noise in bistatic and multistatic SAR

Author

Krieger, Gerhard ; Younis, Marwan

Author_Institution

German Aerosp. Center, Oberpfaffenhofen

Volume

3

Issue

3

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

424

Lastpage

428

Abstract

This letter addresses the impact of limited oscillator stability in bistatic and multistatic synthetic aperture radars (SARs). Oscillator noise deserves special attention in distributed SAR systems since there is no cancellation of low-frequency phase errors as in a monostatic SAR, where the same oscillator signal is used for modulation and demodulation. It is shown that the uncompensated phase noise may cause a time-variant shift, spurious sidelobes, and a broadening of the impulse response, as well as a low-frequency phase modulation of the focused SAR signal. Quantitative estimates are derived analytically for each of these errors based on a system-theoretic model taking into account the second-order statistics of the oscillator phase noise

Keywords

geophysical equipment; oscillators; phase modulation; phase noise; remote sensing by radar; synthetic aperture radar; bistatic SAR; distributed SAR system; interferometry; low-frequency phase modulation; multistatic SAR; oscillator phase noise; oscillator stability; second-order statistics; synchronization; synthetic aperture radar; Demodulation; Error analysis; Low-frequency noise; Noise cancellation; Oscillators; Phase estimation; Phase modulation; Phase noise; Stability; Statistical analysis; Bistatic radar; interferometry; multistatic radar; oscillator; phase noise; synchronization; synthetic aperture radar;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2006.874164

Filename

1658019