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Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05.

DOI: 10.1109/igarss.2005.1525293

Institute of Electrical and Electronics Engineers, IEEE Geoscience and Remote Sensing Letters, 3(3), p. 424-428, 2006

DOI: 10.1109/lgrs.2006.874164

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Impact of Oscillator Noise in Bistatic and Multistatic SAR

Journal article published in 2005 by Gerhard Krieger, Marc Rodriguez Cassola, Marc Rodriguez Cassola, Marwan Younis ORCID, Robert Metzig
This paper is available in a repository.
This paper is available in a repository.

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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.